Wikispaces : chessprogramming - items matching description

Abrok

GerdIsenberg — Fri, 28 Nov 2014 11:16:58 GMT

Home * Engines * Abrok

Abrok,
a Winboard and UCI compliant chess engine by Roman Korba ^[1], written in C/C++, and first released in June 2002 ^[2].

Forum Posts

new engine? by Pavel, Winboard Forum, June 02, 2002
Better UCI support for Abrok, version 2.0602 released! by Leo Dijksman, Winboard Forum, June 02, 2002
A suicidal move by Abrok v2.0602 by Igor Gorelikov, Winboard Forum, June 11, 2002
Arasan-Abrok match by Jon Dart, CCC, March 04, 2004 » Arasan

External Links

References

^ "Your name, when spelled in reverse, may be something funny or cool", textreverse.com
^ Abrok from WBEC Ridderkerk

What links here?

Page	Date Edited
Abrok	Nov 28, 2014
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
Roman Korba	Nov 28, 2014

Up one level

Abulafia

GerdIsenberg — Wed, 04 Oct 2017 19:41:11 GMT

Home * Engines * Abulafia

		Abulafia, an UCI compliant experimental open source chess engine by Nicu Ionita written in Haskell, and predecessor of Barbarossa ^[1]. Abulafia uses magic bitboards ^[2] to determine sliding piece attacks, and monad transformers ^[3] ^[4] in continuation passing style to control the search.
Abulafia's Light of the Intellect (1285) ^[5]

Forum Posts

Abulafia, chess, Haskell and some (new?) ideas by Nicu Ionita, CCC, April 20, 2012
The best chess engine written in Haskell by Ruxy Sylwyka, CCC, January 18, 2013

External Links

Chess Engine

Misc

References

^ Barbarossa 0.1.0 by Nicu Ionita, CCC, November 24, 2013
^ Abulafia/Magics.hs at master · nionita/Abulafia · GitHub
^ Haskell/Monad transformers - Wikibooks
^ Haskell/Understanding monads - Wikibooks
^ An illuminated page from Abraham Abulafia's Light of the Intellect (1285), The Vatican Library, Unknown artist; the author of the book is Abulafia, Kabbalah from Wikipedia, Wikimedia Commons

What links here?

Page	Date Edited
Abulafia	Oct 4, 2017
Barbarossa	Dec 20, 2016
Engines	Mar 10, 2018
Nicu Ionita	May 3, 2017

Up one level

Adam

GerdIsenberg — Tue, 24 Feb 2015 14:07:24 GMT

Home * Engines * Adam

		Adam, a chess engine by Dominique Longbien, written in C++, and first released in June 2002 as WinBoard engine ^[1]. Adam 3.3, released in March 2011, is compatible with UCI only. Adam was active over the board from 2002 until 2006 in participating several French Computer Chess Championship and French Programmers Tournaments. At the FCCC 2003, running in a Pentiom 3, 1.3 GHz, Adam searched about 250 KNPS ^[2].
Michelangelo: Creation of Adam ^[3]

Forum Posts

WB Engine 150, Adam by Dominique Longbien (France) is available by Frank Quisinsky, Winboard Forum, June 05, 2002
adam.exe,any chance for a non enchanched compile for us by mike schoonover, Winboard Forum, June 06, 2002
To Dominique Longbien: About Adam ... by Carlos, Winboard Forum, October 11, 2002
Help nalimov implementation by Dominique Longbien, Winboard Forum, April 16, 2003

External Links

Chess Engine

Adam from WBEC Ridderkerk
Adam 3.3 in CCRL 40/40

Misc

References

^ WB Engine 150, Adam by Dominique Longbien (France) is available by Frank Quisinsky, Winboard Forum, June 05, 2002
^ CHESS WIZARD Champion de France 2003 !
^ Detail of Michelangelo's The Creation of Adam, Fresco Sistine Chapel ceiling ca. 1512, source: Web Gallery of Art, Wikimedia Commons

What links here?

Page	Date Edited
Adam	Feb 24, 2015
Dominique Longbien	Aug 20, 2015
Engines	Mar 10, 2018
FCCC 2003	Jan 26, 2013
FCCC 2004	Jun 16, 2013
Massy 2002	Jan 2, 2018
Massy 2003	Jan 27, 2013
Massy 2004	Oct 27, 2016
Massy 2006	Jan 29, 2013
PixChess	Oct 27, 2016

Up one Level

AICE

GerdIsenberg — Wed, 29 Nov 2017 09:40:18 GMT

Home * Engines * AICE

		AICE, a free Chess Engine Communication Protocol and UCI compliant chess engine, written by Anastasios Milikas in C++ using the Standard Template Library, with Windows and Linux binaries available ^[1]. AICE is an Arena partner engine ^[2], and able to play Chess960, participated at the two open Livingston Chess960 Computer World Championships, the Chess960CWC 2005 and the Chess960CWC 2006.
AICE Logo ^[3]

Etymology

AICE stands for Artificially Intelligent Chess Engine, as explained by Anastasios, who also remarked "This is probably not a good name, since the engine is not intelligent! But I am working on it…” ^[4]. Anastasios initial intention with AICE was to use neural networks and genetic algorithms in order to optimize its evaluation weights, but he found that this was not productive and suitable for a chess evaluation function. They might be useful in time management, or controlling extentions or reductions ^[5].

Features

AICE is a bitboard based PV searcher with adaptive null move pruning in none PV-Nodes, using SEE, history- and killer heuristic to improve move ordering, and fractional extensions and non recursive reductions based on evaluation and history. In version 0.73, fail-high reductions were implemented in addition to null move pruning, but removed in in 0.97. Beside the transposition table and a smaller hash table for the quiescence search, AICE maintains a pawn hash table to cache once calculated pawn structure related data.

Forum Posts

AICE 0.85 by milix, Winboard Forum, December 21, 2004
AICE 0.86 by milix, Winboard Forum, December 30, 2004
Cycle VI-2005 6. Bundesliga result and games - AICE ! by Karl-Heinz Söntges, CCC, July 24, 2005
Aice 0.96 Linux: confused by a draw offer by Volker Pittlik, Winboard Forum, August 10, 2006
AICE 0.99.2 by milix, Winboard Forum, August 25, 2006

External Links

Chess Engine

milix AICE chess engine for both UCI and Winboard
Interview with the programmer of AICE by Alexander Schmidt and Frank Quisinsky, Arena Chess GUI 3.0 - Archive 8, 118, April 27, 2005
Portrait of Anastasios Mikilas, author of the Chess960 engine AICE by Mark Vogelgesang, July 21, 2005
Arena Chess GUI 3.0 - Aice
Aice 0.99.2 in CCRL 40/40
Aice 0.99.2 in CCRL 40/4 FRC

Misc

References

^ milix AICE chess engine for both UCI and Winboard
^ Arena Chess GUI 3.0 - Aice
^ milix AICE chess engine for both UCI and Winboard
^ Portrait of Anastasios Mikilas, author of the Chess960 engine AICE by Mark Vogelgesang, July 21, 2005
^ Interview with the programmer of AICE by Alexander Schmidt and Frank Quisinsky, Arena Chess GUI 3.0 - Archive 8, 118, April 27, 2005

What links here?

Page	Date Edited
AICE	Nov 29, 2017
Anastasios Milikas	Nov 29, 2017
Arena	Mar 16, 2018
Chess960CWC 2005	Jan 1, 2016
Chess960CWC 2006	Sep 25, 2014
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
iCE	Jan 4, 2016

Up one Level

Alaric

GerdIsenberg — Wed, 05 Mar 2014 07:57:26 GMT

Home * Engines * Alaric

		Alaric, (TerraPi) a WinBoard and UCI compliant chess engine written by Peter Fendrich in C++. It uses both bitboards and other structures to represent the board and to generate moves, and further utilizes transposition table, pawn hash table, history tables, and two killer slots per ply. Inside its principal variation search with null move pruning, a precise prediction of node types takes place in order to guide the search ^[1].
Alaric I ^[2]

Etymology

The chess engine Alaric is named after Alaric I (around 370 – 410 AD), King of the Visigoths from 395, who managed to walk with his forces right through the Roman empire, invaded Italy and sacked Rome in 410. Before that in the year 394 he served as a leader of Germanic troops under Roman command of Theodosius I but wasn't happy with how the Goths were treated ^[3].

Tournament Play

Alaric played the CCT9 with a result of 3½/7, and, under the handle TerraPi, a successful WCRCC 2007, becoming 6th with 8½/14 ^[4]. One year later, at the WCRCC 2008, Alaric even became 4th with 9½/14 ^[5]. Alaric's opening book was cooked by Günther Simon ^[6].

Selected Games

CCT9

CCT9, Buzz - Alaric ^[7]

[Event "CCT9"]
[Site "Internet Chess Club"]
[Date "2007.02.17"]
[Round "?"]
[White "Buzz"]
[Black "Alaric"]
[Result "0-1"]
 
1.c4 e6 2.d4 c5 3.d5 exd5 4.cxd5 Nf6 5.Nc3 d6 6.e4 Be7 7.Be2 Qa5 8.Kf1 O-O 
9.f4 Na6 10.e5 Ne8 11.a3 Qc7 12.Nf3 Bg4 13.Bxa6 bxa6 14.exd6 Nxd6 15.h3 Bd7 
16.g4 Bf6 17.Kg2 Rfe8 18.Re1 Rxe1 19.Nxe1 Re8 20.Nd3 Nc4 21.Qf3 Bd4 22.Kg3
h5 23.gxh5 Bf5 24.Kh2 Qb8 25.h6 Qb3 26.Ne5 Nxe5 27.fxe5 Bxe5+ 28.Kg2 Qc2+ 
29.Qe2 Be4+ 30.Kf2 Bd4+ 31.Kg3 Qb3 32.Kh4 Bf6+ 33.Bg5 Bxg5+ 34.Kxg5 f6+ 
35.Kh4 g5+ 36.Kh5 Kf7 37.Re1 Bg6+ 38.Kg4 Rxe2 39.Rxe2 Bd3 40.Rf2 Bf1 41.Rxf1 
Qxb2 42.Kg3 Qxc3+ 43.Rf3 Qe5+ 44.Kf2 Qxd5 45.Ke2 Kg6 46.h7 Kxh7 47.Rc3 Qd4 
48.Rd3 Qe5+ 49.Re3 Qb2+ 50.Kd3 Qd4+ 51.Ke2 c4 52.Re7+ Kh6 53.Kf1 Qd1+ 54.Re1 
Qf3+ 55.Kg1 c3 56.Rf1 Qg3+ 57.Kh1 c2 58.h4 Kh5 59.Rc1 Kxh4 60.Rxc2 Kh3 61.Re2 
Qf3+ 62.Kg1 Qxe2 63.a4 Qg2# 0-1

WCRCC 2008

WCRCC 2008, round 2, Alaric (TerraPi) - Arasan ^[8] ^[9]

[Event "WCRCC 2008"]
[Site "Internet Chess Club"]
[Date "2008.06.21"]
[Round "2"]
[White "TerraPi"]
[Black "Arasan"]
[Result "1-0"]
 
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d5 
9.exd5 Nxd5 10.Nxe5 Nxe5 11.Rxe5 c6 12.d4 Bd6 13.Re1 Qh4 14.g3 Qh3 15.Re4 
g5 16.Qe1 Bf5 17.Nd2 Nf6 18.f3 Nxe4 19.Nxe4 Bxe4 20.fxe4 Be7 21.e5 Qg4 22.Qd1 
Qxd1+ 23.Bxd1 Rab8 24.Bf3 Rfc8 25.Be3 Kg7 26.Be4 h6 27.Rf1 a5 28.Kg2 Rc7 
29.Kf3 Rh8 30.h3 Rd8 31.Kg4 a4 32.Rd1 Rf8 33.Kf5 Rb8 34.Rh1 Rh8 35.h4 Rcc8 
36.b3 axb3 37.axb3 Rc7 38.hxg5 Bxg5 39.Bxg5 hxg5 40.Rxh8 Kxh8 41.Kxg5 Kg7 
42.c4 bxc4 43.bxc4 Rc8 44.g4 Rd8 45.d5 cxd5 46.cxd5 Rc8 47.d6 Rc1 48.Kf4 Rf1+ 
49.Ke3 Re1+ 50.Kf3 Kh6 51.Kf4 Kg7 52.g5 Rf1+ 53.Ke3 Rd1 54.Bd3 Kf8 55.g6 fxg6 
56.Bxg6 Rg1 57.Bd3 Re1+ 58.Kd4 Ke8 59.Bc4 Kd7 60.Kd5 Rd1+ 61.Kc5 Re1 62.e6+ 
Kd8 63.Kd4 Kc8 1-0

Forum Posts

About the "final" Terra and Alaric by Peter Fendrich, Winboard Forum, January 28, 2005
Alaric new version by Peter Fendrich, Winboard Forum, February 12, 2007
New Alaric by Peter Fendrich, Winboard Forum, March 30, 2007
Alaric 704 : 2607 by Patrick Buchmann, CCC, April 06, 2007
Alaric test for Fritz users by Peter Fendrich, CCC, July 01, 2007
Alaric 707 by Peter Fendrich, Winboard Forum, July 14, 2007
Alaric 707 : 2670 by Patrick Buchmann, CCC, July 15, 2007
Where is Alaric? by Mike Scheidl, CCC, January 08, 2008
some notes re Arasan games in ACCA by Jon Dart, CCC, June 22, 2008 » WCRCC 2008, Arasan
WCRCC: Sjeng-TerraPi sac by Jon Dart, CCC, June 25, 2008 » WCRCC 2008, Deep Sjeng
Operator for Alaric in World Comp Rapid Chess Championship by Peter Fendrich, CCC, August 12, 2009 » WCRCC 2009

External Links

Chess Engine

Misc

References

^ Alaric - About the engine
^ Portrait of Alaric in C. Strahlheim, Das Welttheater, 4. Band, Frankfurt a.M., 1836, Alaric I from Wikipedia
^ Alaric - About Alaric and the Goths
^ Alaric @ WCRCC tournament by Peter Fendrich, July 24, 2007
^ Alaric's results by Peter Fendrich, June 23, 2008
^ Alaric - Downloads
^ Buzz (Computer) vs Alaric (Computer) (2007) from chessgames.com
^ 2008 Second Annual ACCA World Computer Chess Championships - Results
^ some notes re Arasan games in ACCA by Jon Dart, CCC, June 22, 2008

What links here?

Page	Date Edited
Alaric	Mar 4, 2014
CCT9	Aug 25, 2013
Contempt Factor	Mar 10, 2018
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
Günther Simon	Jul 30, 2017
Peter Fendrich	May 19, 2017
Terra	Feb 11, 2015
Thread	Apr 22, 2018
WCRCC 2007	Nov 21, 2016
WCRCC 2008	Nov 21, 2016

Up one Level

Alfil

GerdIsenberg — Thu, 03 Sep 2015 21:10:22 GMT

Home * Engines * Alfil

		AlfilChess, (Alfil Chess, Alfil) a chess program by Enrique Sánchez Acosta, written in C++, first incorporated as chess engine of TotalChess 2000, and subsequently since 2001 commercially released as Alfil Chess I and Alfil Chess 2.2 by Hollywood Publishing ^[1]. Alfil has become a free engine under Windows, compliant with UCI, and under Linux, compliant with the Chess Engine Communication Protocol. More recent versions have a parallel search with multiple threads and are able to probe Nalimov Tablebases ^[2], and were ported to Android ^[3].
Alfil for Android ^[4]

C# Engine Project

The C# Engine Project, at first dubbed Alfil 15 and released as open source in 2015, started from Stockfish v5 and various C# ports such as Portfish, and over the time incorporated ideas and knowledge gained from over 10 years of Alfil development, and from other open source engines ^[5]. Alfil 15 was registered for TCEC Season 8, when it was disqualified after its first game versus Pedone, since it could not disable its internal book, not complying with the TCEC rules ^[6]. After that incident, and due to discussions on Alfil's 15 origins in computer chess forums ^[7], the author made these more explicit on September 02, 2015, renamed the program, and invited everyone to collaborate ^[8].

Selected Games

TCEC - Stage 1 - Season 5, Alfil 13.1 - Arasan 16 ^[9]

[Event "TCEC - Stage 1 - Season 5"]
[Site "http://www.tcec-chess.net"]
[Date "2013.09.05"]
[Round "4.16"]
[White "Alfil 13.1"]
[Black "Arasan 16"]
[Result "1/2-1/2"]
 
1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 O-O 6.Bd3 Na6 7.e5 dxe5 8.fxe5
Nd7 9.Na4 c5 10.c3 Rb8 11.Bf4 b5 12.e6 bxa4 13.exd7 Qxd7 14.Bxb8 Nxb8
15.O-O cxd4 16.Nxd4 Bxd4+ 17.cxd4 Qxd4+ 18.Kh1 Be6 19.Rc1 Qxb2 20.Bc4
Bxc4 21.Rxc4 Qxa2 22.Rxa4 Qe6 23.Re1 Qf6 24.Rxa7 Nc6 25.Rc7 Rd8 26.Qf3
Ne5 27.Qxf6 exf6 28.Rc2 Kg7 29.g3 Rd5 30.Kg2 f5 31.Ree2 g5 32.Red2 Rb5
33.Ra2 h6 34.Ra7 f4 35.gxf4 gxf4 36.Ra4 f3+ 37.Kf2 Rb3 38.Rad4 h5 39.h3
Kg6 40.Rd5 Kf5 41.Rd1 f6 42.R5d2 Rb4 43.Rd4 Rb7 44.Rg1 Rb2+ 45.Kg3 Kg5
46.h4+ Kg6 47.Rf4 Rb3 48.Re4 Ng4 49.Rxg4+ hxg4 50.Kxg4 f2 51.Rf1 f5+
52.Kf4 Rb4+ 53.Kf3 Rxh4 54.Rxf2 1/2-1/2

Forum Posts

2007 ...

Alfil 7.5 : 2293 by Patrick Buchmann, CCC, May 20, 2007
Alfil 8 beta 0.4 : 2472 by Patrick Buchmann, CCC, November 01, 2007
Alfil 8.1 : 2464 by Patrick Buchmann, CCC, January 21, 2008
Alfil 8.1.1 SIMD by Tony Thomas, CCC, February 25, 2008

2010 ...

Alfil 11 MT by esacosta, CCC, November 29, 2011
Alfil on FICS by esacosta, CCC, December 15, 2011

2015 ...

Alfil 15.4 C# (beta 17) by Enrique Sánchez, CCC, April 21, 2015
Alfil 15.7 by Enrique Sánchez, CCC, July 12, 2015
Has Alfil 15.8 been withdrawn? by Gabor Szots, CCC, August 29, 2015

External Links

Chess Engine

Misc

Alfil - Wikipedia.es (Spanish)
Alfil (chess) from Wikipedia

References

What links here?

Page	Date Edited
Alfil	Sep 3, 2015
Engine releases	Apr 23, 2018
Engines	Mar 10, 2018
Enrique Sánchez Acosta	Apr 22, 2015
TCEC Season 5	Jun 2, 2014
TCEC Season 6	Dec 2, 2014
TCEC Season 7	Jan 23, 2015

Up one level

AliChess

GerdIsenberg — Fri, 05 Feb 2016 15:49:55 GMT

Home * Engines * AliChess

AliChess,
an UCI compliant chess engine by Anton Lindenmair, which first appeared in 2006 on Playchess ^[1].

Forum Posts

AliChess 4.08 : 2207 by Patrick Buchmann, CCC, April 05, 2007
Eigenmann Endgame Test: AliChess & SlowChess by Walter Eigenmann, CCC, April 10, 2007 » Eigenmann Endgame Test

External Links

References

^ Hiarcs 10 in Blitz Games LIVE on Playchess ! - who is AliChess 4.00 ? by Eduard Nemeth, CCC, January 07, 2006

What links here?

Page	Date Edited
AliChess	Feb 5, 2016
Anton Lindenmair	Feb 2, 2016
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
IGWT III	May 15, 2017

Up one Level

Amoeba

GerdIsenberg — Mon, 19 Mar 2018 08:00:37 GMT

Home * Engines * Amoeba

		Amoeba, an UCI compliant open source chess engine by Richard Delorme, written in D language, first released in May 2016 ^[1], licensed under the GPL v3.0. Amoeba uses the Nelder–Mead method ^[2] or downhill simplex method ^[3] to tune its evaluation parameters, also called amoeba method and eponym of the program ^[4].
Amoeba search of Simionescu function ^[5]

Features

^[6]

Board Representation

Search

Iterative Deepening
Aspiration Windows (improved in 2.6)
Principal Variation Search
Transposition Table (improved in 2.6)
Quiescence Search
Internal Iterative Deepening
Static Exchange Evaluation (SEE pruning improved in 2.6)
Check Extensions
Null Move Pruning
Reverse Futility Pruning
Razoring
Mate Distance Pruning
Late Move Reductions (improved in 2.6)

Evaluation

Tapered Eval
Lazy Evaluation
Mobility
Pawn Structure
Tempo
Automated Tuning using Nelder–Mead method aka Amoeba method

Tournament Manager

With the release of Amoeba 2.1, the code of a tournament manager was published also written in D language, used to validate or reject Amoeba changes ^[7]. So far only with fixed time per move, it

can use various openings from pgn file
can play several games in parallel
can set H0 & H1 hypothesis for SPRT ^[8]
can saves played game to a pgn file

Forum Posts

2016

amoeba a new UCI engine by Richard Delorme, CCC, May 20, 2016
Amoeba 1.3 released by Richard Delorme, CCC, August 03, 2016
Amoeba 2.0 by Richard Delorme, CCC, November 27, 2016

2017

amoeba 2.1 by Richard Delorme, CCC, January 24, 2017
sprt tourney manager by Richard Delorme, CCC, January 24, 2017 » Amoeba Tournament Manager, SPRT
amoeba 2.2 released by Günther Simon, CCC, March 03, 2017
Amoeba 2.4 by Richard Delorme, CCC, April 19, 2017
Amoeba 2.5 by Richard Delorme, CCC, June 07, 2017
Amoeba 2.6 by Richard Delorme, CCC, September 22, 2017
Amoeba 2.7 by Richard Delorme, CCC, December 11, 2017

2018

Amoeba 2.8 by Richard Delorme, CCC, March 18, 2018

External Links

Chess Engine

Misc

References

^ amoeba a new UCI engine by Richard Delorme, CCC, May 20, 2016
^ John Nelder, Roger Mead (1965). A Simplex Method for Function Minimization. The Computer Journal, Vol. 7, No. 4, doi:10.1093/comjnl/7.4.308
^ Margaret H. Wright (2012). Nelder, Mead, and the Other Simplex Method. Documenta Mathematica, Extra Volume Optimization Stories, pdf
^ amoeba/README.md at master · abulmo/amoeba · GitHub
^ Animated Nelder-Mead minimum search of Simionescu function, by Pasimi, November 22, 2016, CC BY-SA 4.0, Wikimedia Commons
^ Features as mentioned in amoeba/README.md at master · abulmo/amoeba · GitHub
^ sprt tourney manager by Richard Delorme, CCC, January 24, 2017
^ The SPRT without draw model, elo model or whatever... by Michel Van den Bergh, CCC, September 01, 2015

What links here?

Page	Date Edited
Amoeba	Mar 19, 2018
Automated Tuning	Feb 27, 2018
Cutechess-cli	Jan 6, 2018
Dumb	Mar 10, 2018
Engine releases	Apr 23, 2018
Engine Testing	Feb 1, 2018
Engines	Mar 10, 2018
LittleBlitzer	Jan 24, 2017
Match Statistics	Mar 31, 2018
Richard Delorme	Sep 30, 2017
Tournaments	Dec 21, 2017

Up one Level

Amyan

GerdIsenberg — Tue, 10 Dec 2013 20:38:42 GMT

Home * Engines * Amyan

		Amyan, a chess engine written by Antonio Dieguez running under Windows, compliant to the Chess Engine Communication Protocol aka WinBoard, and the Universal Chess Interface (UCI). Amyan was first released in 2000, the still available Amyan 1.522 Version from 2002 has an own GUI. The program is written in C++ ^[1], a ported Java applet is able to run in a Web browser using a Java virtual machine ^[2]. Amyan played the CCT4, CCT5 and CCT6 CCT Tournaments, and became the First Annual ACCA Americas' Computer Chess Champion at ACCA 2006, to further play the ACCA 2009. At the 4th Chess Computer Cup 2008 in Carugate, Italy, Amyan was tied with winner DanaSah, both with 5/6 and also equal sum of opponent scores, but Amyan played the draw versus Chiron in round 2, DanaSah in round 5 gaining higher cumulative score.
Amyan 1.522 (GUI ^[3]

Description

Description of Board Representation, Search and Evaluation loosely based on the readme.txt file of Amyan 1.72, by Antonio Dieguez ^[4].

Board Representation

Amyan's mailbox board array has index 11 for a1 and 88 for h8, so it is apparently a 10*10 board with following index mapping. It further uses bitboards mainly for pawns.

int mailbox[100] = {
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   -1,  0,  1,  2,  3,  4,  5,  6,  7, -1,
   -1,  8,  9, 10, 11, 12, 13, 14, 15, -1,
   -1, 16, 17, 18, 19, 20, 21, 22, 23, -1,
   -1, 24, 25, 26, 27, 28, 29, 30, 31, -1,
   -1, 32, 33, 34, 35, 36, 37, 38, 39, -1,
   -1, 40, 41, 42, 43, 44, 45, 46, 47, -1,
   -1, 48, 49, 50, 51, 52, 53, 54, 55, -1,
   -1, 56, 57, 58, 59, 60, 61, 62, 63, -1,
   -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};
 
int mailbox64[64] = {
   11, 12, 13, 14, 15, 16, 17, 18,
   21, 22, 23, 24, 25, 26, 27, 28,
   31, 32, 33, 34, 35, 36, 37, 38,
   41, 42, 43, 44, 45, 46, 47, 48,
   51, 52, 53, 54, 55, 56, 57, 58,
   61, 62, 63, 64, 65, 66, 67, 68,
   71, 72, 73, 74, 75, 76, 77, 78,
   81, 82, 83, 84, 85, 86, 87, 88,
};

Search

Principal Variation Search
Null Move Pruning with R=2
Killer Heuristic with several Killer moves
Futility Pruning
Late Move Reductions
Captures ordered by MVV-LVA
Extensions restricted to one ply per line, except check evasions
Transposition Table

Evaluation

Evaluation Hash Table
Pawn Hash Table
Doubled and isolated pawns depending on file
Pawn Center
Passed Pawns depending on rank
Connected Passed Pawns
Blockade of Stop
Tarrasch Rule
King Safety
King Tropism
Pawn Storms
Mobility with King and center considerations
Rooks on (semi) open files
Rook on Seventh
Piece-Square Tables for knights, bishops and queens
Knight outposts
Scoring of some pins

Selected Games

ACCA 2006, round 2, Amyan - Crafty ^[5]

[Event "ACCA 2006"]
[Site "ICC"]
[Date "2006.11.08"]
[Round "2"]
[White "Amyan"]
[Black "Crafty"]
[Result "1-0"]
 
1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5
8.Bb5+ Bd7 9.Be2 cxd4 10.cxd4 Bc6 11.Qc2 Bxd4 12.Nxd4 Qxd4 13.Bb2
Qb4+ 14.Bc3 Qc5 15.O-O O-O 16.Rac1 Rd8 17.Qb2 Qg5 18.f4 Qh6 19.Ba5
Rd7 20.Rc4 b6 21.Bb4 a5 22.Bd2 Rd8 23.Rfc1 Be8 24.Be3 Nd7 25.e5 e6
26.Rc7 a4 27.Bb5 Qh5 28.Qf2 Qf5 29.Be2 g5 30.g4 Qg6 31.h4 gxh4 32.
Qxh4 Nc5 33.Bf3 Rab8 34.Bg2 Rd3 35.Re1 Qg7 36.g5 Rc3 37.Re2 Qg6 38.
Bxc5 Rxc5 39.Rxc5 bxc5 40.Be4 Qg7 41.Rh2 h6 42.Qf2 hxg5 43.Qxc5 Rd8
44.Bh7+ Qxh7 45.Rxh7 Kxh7 46.Qe7 Rb8 47.Qxg5 Rb1+ 48.Kf2 Bb5 49.Ke3
Rf1 50.Qg2 Re1+ 51.Kd4 Rc1 52.Qb7 Rc4+ 53.Ke3 Be8 54.Qe7 Rc3+ 55.Kd4
Rc8 56.f5 exf5 57.e6 Kg6 58.Ke5 1-0

Forum Posts

interesting game, Crafty vs Amyan by Antonio Dieguez, CCC, September 18, 2000
About Pepito and Amyan by José Carlos, CCC, September 24, 2000 » Pepito
CCT5 - ok, a short comment, just Amyan... by Antonio Dieguez, CCC, January 20, 2003 » CCT5
Older Versions of Amyan by Swaminathan, CCC, October 24, 2008
just amyan... by Antonio Dieguez, CCC, September 14, 2009
Amyan 1.6 : 2477 by Patrick Buchmann, CCC, September 17, 2009
Amyan 1.71 : 2490 by Patrick Buchmann, CCC, October 18, 2009
move in the pv at starting position by Antonio Dieguez, CCC, November 05, 2009

External Links

References

^ Amyan from WBEC Ridderkerk
^ Amyan ...
^ Amyan <- Antonio Diéguez, Amyan 1.522 screenshot
^ readme.txt, download Amyan 1.72, Amyan <- Antonio Diéguez
^ The 2006 First Annual ACCA Americas' Computer Chess Championships - Results - PGN download

What links here?

Page	Date Edited
ACCA 2006	Jul 14, 2014
ACCA 2009	Jul 14, 2014
ACCA Americas' Computer Chess Championship	Nov 20, 2014
Amy	May 9, 2017
Amyan	Dec 10, 2013
Antonio Dieguez	Dec 22, 2012
CCC 2009	Apr 29, 2015
CCT12	Jan 28, 2018
CCT4	Apr 22, 2013
CCT5	Feb 22, 2013
CCT6	May 29, 2014
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
José Carlos Martínez Galán	Feb 19, 2017
Pepito	Nov 27, 2014
Swaminathan Natarajan	Jun 17, 2015

Up one Level

Andscacs

GerdIsenberg — Tue, 16 Jan 2018 10:28:17 GMT

Home * Engines * Andscacs

		Andscacs, an UCI compliant chess engine by Daniel José Queraltó. Its development started in September 2013, and the first release was published in February 2014 ^[1]. Andscacs soon evolved to a top engine, becoming runner-up at the IGWT III losing the final from Chiron with the narrowest margin of 4½ - 5½, but taking revenge one year later at the IGWT IV, this time with 6½ - 5½ to its favour. At the Tenth Annual ACCA World Computer Rapid Chess Championship 2016, Andscacs emphasized its ambitions, and became runner-up without losing a single game, but 12 wins and 3 draws, and thus the only program preventing later winner Komodo from a 100% score.
Andscacs Logo ^[2]

Description

Being a bitboard engine, Andscacs determines sliding piece attacks ray-wise, quite similar to the classical approach ^[3]. Since version 0.70, Andscacs uses magic bitboards to speed the attack calculations ^[4].

Search

Andscacs applies a principal variation search with tranposition table inside an iterative deepening framework with aspiration windows ^[5]. Beside quiescence, selectivity is due to adaptive null move pruning, late move reductions, check extensions, singular extensions, razoring and futility pruning. Move ordering is further improved by the killer heuristic, IID and static exchange evaluation, the latter also used to prune bad captures in quiescence and futile moves near the horizon. Since version 0.70, a hash move is tried in quiescence search even if it’s a quiet move. Trying only captures and promotions was clearly weaker ^[6]. Version 0.80 in Apil 2015 introduced a threaded parallel search ^[7], a Lazy SMP approach ^[8].

Evaluation

The evaluation considers material imbalances, and has piece-square tables for middlegame and endgame, piece values adapted by type of positions (open, closed), different types of piece mobility, king safety and sophisticated pawn structure evaluation with focus on passed pawns, most features smoothed out between game phases by a tapered eval. Since version 0.62u, evaluation scores are cached with a small evaluation hash table ^[9].

Tuning

The about 200 evaluation features were tuned with 750.000 positions to minimize the standard deviation of Stockfish's and Andscacs' static evaluation, which initially added a nice Elo boost to Andscacs ^[10], without playing too similar.

Forum Posts

2014

New engine - Andscacs by Daniel José Queraltó, CCC, February 06, 2014
Andscacs - New version by Daniel José Queraltó, CCC, February 09, 2014
Andscacs - New version by Daniel José Queraltó, CCC, March 03, 2014
Andscacs - New version 0.62w by Daniel José Queraltó, CCC, April 10, 2014
Andscacs - New version 0.62x by Daniel José Queraltó, CCC, May 05, 2014
Andscacs - New version 0.64 by Daniel José Queraltó, CCC, June 07, 2014
Andscacs - New version 0.70 by Daniel José Queraltó, CCC, November 05, 2014
Changes in Andscacs 0.70 by Daniel José Queraltó, CCC, November 08, 2014
Andscacs - New version 0.71 by Daniel José Queraltó, CCC, December 17, 2014
Changes in Andscacs 0.71 by Daniel José Queraltó, CCC, December 19, 2014

2015

Andscacs - New version 0.72 by Daniel José Queraltó, CCC, February 01, 2015
Andscacs - Test version 74024 by Daniel José Queraltó, CCC, April 09, 2015
Trying to improve lazy smp by Daniel José Queraltó, CCC, April 11, 2015 » Lazy SMP
Empirical results with Lazy SMP, YBWC, DTS by Kai Laskos, CCC, April 16, 2015 » Lazy SMP, YBWC, DTS
Andscacs - New version 0.80 by Daniel José Queraltó, CCC, April 17, 2015
Andscacs - New version 0.81 by Daniel José Queraltó, CCC, June 20, 2015
Andscacs - New version 0.81 - Detailed changes by Daniel José Queraltó, CCC, June 20, 2015
Andscacs - New version 0.82 by Daniel José Queraltó, CCC, August 16, 2015
Andscacs - New version 0.83 by Daniel José Queraltó, CCC, November 10, 2015
Andscacs - New version 0.84 by Daniel José Queraltó, CCC, December 07, 2015
Re: Why computing K that minimizes the sigmoid func. value? by Daniel José Queraltó, CCC, December 07, 2015 » Texel's Tuning Method

2016

Andscacs - New version 0.85 by Daniel José Queraltó, CCC, January 22, 2016
Andscacs - New version 0.86 by Daniel José Queraltó, CCC, March 24, 2016
Singular extension by Daniel José Queraltó, CCC, June 11, 2016 » Singular Extensions
Andscacs 0.86.196 BMI2 is available ... by Frank Quisinsky, June 15, 2016 » BMI2
Andscacs - New version 0.87 by Daniel José Queraltó, CCC, June 19, 2016
Andscacs - New version 0.872 by Daniel José Queraltó, CCC, July 23, 2016
Detailed changes in Andscacs from 0.86 to 0.872 by Daniel José Queraltó, CCC, July 25, 2016
Andscacs, developing version by Daniel José Queraltó, CCC, October 22, 2016
Andscacs - New version 0.88 by Daniel José Queraltó, CCC, October 28, 2016

2017

Andscacs - New version 0.90 by Daniel José Queraltó, CCC, March 25, 2017
Andscacs - New version 0.91 by Daniel José Queraltó, CCC, May 09, 2017
Andscacs new PH feature: first impressions by Rodolfo Leoni, CCC, July 08, 2017 » Persistent Hash Table
Andscacs - New version 0.92 by Daniel José Queraltó, CCC, September 17, 2017
Andscacs - New version 0.921 with source by Daniel José Queraltó, CCC, November 04, 2017
Re: Andscacs - New version 0.921 with source by Jon Dart, CCC, November 09, 2017 » TCEC Season 10
Re: Andscacs - New version 0.921 with source by Ronald de Man, CCC, November 11, 2017
Andscacs, test version by Daniel José Queraltó, CCC, December 31, 2017

2018

Andscacs - New version 0.93 by Daniel José Queraltó, CCC, January 14, 2018

External Links

Chess Engine

Misc

Jorge Retamoza Cuarteto - La Cachila, Andorra Jazz Hivern Fest 2013, YouTube Video
Claudio Constantini, Alejandro Di Costanzo, Hernán Hock, Jorge Retamoza

References

^ New engine - Andscacs by Daniel José Queraltó, CCC, February 06, 2014
^ Andscacs Logo with Flag of Andorra, Andscacs Homepage
^ Re: Andscacs - New version by Daniel José Queraltó, CCC, March 03, 2014
^ Andscacs - New version 0.70 by Daniel José Queraltó, CCC, November 05, 2014
^ New engine - Andscacs by Daniel José Queraltó, CCC, February 06, 2014
^ Changes in Andscacs 0.70 by Daniel José Queraltó, CCC, November 08, 2014
^ Andscacs - New version 0.80 by Daniel José Queraltó, CCC, April 17, 2015
^ Trying to improve lazy smp by Daniel José Queraltó, CCC, April 11, 2015
^ Andscacs Homepage
^ Re: New engine - Andscacs by Daniel José Queraltó, CCC, February 06, 2014

What links here?

Page	Date Edited
Andscacs	Jan 16, 2018
Daniel José Queraltó	Dec 31, 2017
Engine releases	Apr 23, 2018
Engines	Mar 10, 2018
IGT 2017	Oct 2, 2017
IGWT III	May 15, 2017
IGWT IV	May 17, 2017
Italian Computer Chess Championship	Sep 24, 2017
Komodo	Mar 6, 2018
Lazy SMP	Jan 4, 2018
Persistent Hash Table	Dec 31, 2017
Shield	May 17, 2017
Singular Extensions	Jan 9, 2018
TCEC Season 10	Jan 3, 2018
TCEC Season 11	Apr 18, 2018
TCEC Season 9	Nov 6, 2017
Texel's Tuning Method	Dec 2, 2017
WCRCC 2016	Jun 27, 2017

Up one level

Anechka

GerdIsenberg — Thu, 20 Mar 2014 13:11:20 GMT

Home * Engines * Anechka

Anechka, (Анечка, Anya)
an UCI compliant chess engine by Sergei Nefedov, written in Delphi. The program was developed incrementally, starting with board representation, generation, make and unmake move, alpha-beta search, and rudimentary evaluation, published in 2003, further improving in subsequent versions. Version 0.05 disabled checks in quiescence search and had a slightly modified evaluation function, yielding in a significant increase in playing strength on short time controls ^[1]. Latest version is Anechka 0.08, released in July 2006 ^[2]. This version played the CCCCISC 2008 in Moscow with 3½/7, and the IOPCCC 2008 in Łódź.

Selected Games

IOPCCC 2008, round 2, Tytan - Anechka ^[3]

[Event "IOPCCC 2008"]
[Site "Lodz"]
[Date "2008.06.27"]
[Round "2"]
[White "Tytan"]
[Black "Anechka"]
[Result "1/2-1/2"]
 
1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.O-O Nc6 8.e3 O-O 9.Nc3 Re8 
10.d5 Ne5 11.Nxe5 Bxe5 12.a4 a5 13.Nb5 Rb8 14.Bd2 Nxd5 15.Bxa5 e6 16.e4 b6 17.Bd2 Ne7 
18.Qc1 Ba6 19.Rd1 Qc8 20.Bf4 Bxf4 21.Qxf4 Bxb5 22.axb5 Rd8 23.Rdc1 Rd7 24.Bf3 Qd8 25.Qe5 
Ra8 26.Ra3 Rc8 27.Rac3 Rd6 28.Bg4 Qd7 29.Qf4 Qd8 30.R3c2 Rd7 31.R2c4 Rd6 32.Qf6 h6 
33.R1c2 Rd7 34.Qe5 Kh7 35.Qf4 Ng8 36.e5 Ra8 37.Qc1 Ra7 38.R4c3 Ne7 39.Ra3 Rb7 40.Bf3 Rb8 
41.Ra7 Rc8 42.Ra1 Nd5 43.Rc4 Qh8 44.Rh4 Qg7 45.Ra7 Re8 46.Qe1 Rde7 47.Rha4 Qh8 48.Qe2 Rd8 
49.Rc4 Rdd7 50.Ra1 Re8 51.Rh4 Ra8 52.Rxa8 Qxa8 53.Qd2 Qf8 54.Qc1 Qg7 55.Re4 Ne7 56.Qc3 Qf8 
57.Rd4 Qd8 58.Rxd7 Qxd7 59.Kg2 Kg7 60.Bc6 Qd8 61.Be4 Kh7 62.Qd3 Qe8 63.Kf3 Kg7 64.h3 Kh7 
65.g4 Kg7 66.h4 Kg8 67.Ke3 Kh8 68.f4 Ng8 69.Bc6 Qe7 70.g5 Qc5+ 71.Qd4 Qc2 72.Qd2 Qf5 73.Qd7 
Qh3+ 74.Bf3 Qxh4 75.Qxc7 Qe1+ 76.Be2 Qg3+ 77.Ke4 Qf2 78.Bf3 Qe1+ 79.Kd3 Qg3 80.Ke4 hxg5 
81.Qxf7 g4 82.Be2 Qg2+ 83.Ke3 Qh3+ 84.Kd4 g3 85.Bf3 g2 86.Bxg2 Qxg2 87.Qxe6 Qxb2+ 88.Ke3 
Qc3+ 89.Ke2 Qc2+ 90.Kf3 Qd3+ 91.Kg2 Qxb5 92.Qxg6 Qe2+ 93.Kg3 Qe3+ 94.Kg2 Qxf4 95.Qxb6 Qxe5 
96.Qb4 Nh6 97.Qh4 Qe2+ 98.Qf2 Qe4+ 99.Qf3 Qg6+ 100.Kf1 Nf5 101.Ke1 Qg5 102.Kf2 Qd2+ 103.Qe2 
Qd4+ 104.Kf3 Nh4+ 105.Kg3 Ng6 106.Qf2 Qh4+ 107.Kf3 Ne5+ 108.Kg2 Qe4+ 109.Kf1 Qc4+ 110.Qe2
Qc1+ 111.Qe1 Qg5 112.Qf2 Kh7 113.Qh2+ Kg7 114.Qg1 Ng4 115.Qd4+ Kg6 116.Qe4+ Kf6 117.Qf3+ 
Ke7 118.Qb7+ Kd8 119.Qh7 Qf4+ 120.Ke2 Qf2+ 121.Kd3 Ne5+ 122.Kc3 Qe3+ 123.Kc2 Qd4 124.Kb1 
Nc4 125.Qb7 Qc3 126.Ka2 Ke8 127.Qc6+ Ke7 128.Qc5+ Ke6 129.Qc6+ Ke5 130.Qc7+ Ke4 131.Qb7+ Kf5 
132.Qf7+ Kg4 133.Qd7+ Kf4 134.Qf7+ Kg3 135.Qg6+ Kh4 136.Qh7+ Kg5 137.Qg8+ Kh6 138.Qf8+ Kg6 
139.Qg8+ 1/2-1/2

External Links

Chess Engine

Anechka by Сергей Нефедов, Russia from sdchess.ru
Anechka 0.08 in CCRL 40/40
Anechka 0.08 in KCEC
Anechka from WBEC Ridderkerk

Misc

List of minor planets: 10001–11000 - 10456 Anechka - Wikipedia
discovered by Nikolai Chernykh, Crimean Astrophysical Observatory, August 8, 1978
DMPN: (10456) Anechka
Anechka | meaning of Anechka | name Anechka
Anya from Wikipedia
Винтаж (Vintage) - Амстердам, Анечка (альбом) (2011), YouTube Video

References

What links here?

Page	Date Edited
Anechka	Mar 20, 2014
CCCCISC 2008	Jan 19, 2014
Engines	Mar 10, 2018
IOPCCC 2008	Feb 23, 2014
Sergei Nefedov	Mar 20, 2014

Up one level

AnMon

GerdIsenberg — Fri, 17 Nov 2017 20:37:38 GMT

Home * Engines * AnMon

		AnMon, a chess program by Christian Barreteau, one of the first engines which supported WinBoard aka the Chess Engine Communication Protocol, later also UCI. AnMon was available as Young Talent by ChessBase running under the Fritz6 GUI ^[1] , and is Arena partner engine ^[2] . It is a tactically very strong MTD(f) searcher. AnMon participated at various French Computer Chess Championships and had its debut at the FCCC 1995, further the WMCCC 1997 in Paris, and multiple Massy French Programmers Tournaments, winning Massy 2000, Massy 2005 and Massy 2006.
Floor mosaic of Chigi Chapel ^[3] ^[4]

Photos & Games

Massy 2002, GNU Chess - AnMon, Pascal Tang, Dominique Longbien, Christian Barreteau, Jean-Philippe Louguet ^[5]

[Event "Massy 2002"]
[Site "Massy, France"]
[Date "2002.05.26"]
[Round "1"]
[White "GNU Chess"]
[Black "AnMon521_UCI"]
[Result "0-1"]
 
1.e4 e5 2.Nf3 Nc6 3.Bb5 g6 4.c3 d6 5.d4 Bd7 6.Qb3 Na5 7.Bxd7+ Qxd7 8.Qd5 Nc6
9.dxe5 dxe5 10.Qxd7+ Kxd7 11.O-O Nf6 12.Nbd2 a5 13.Nc4 Re8 14.Re1 h6 15.a4 Kc8
16.b3 Nd7 17.Nfd2 Nc5 18.Ba3 Nd3 19.Re3 Rd8 20.Rf3 Bxa3 21.Rxa3 Nc5 22.Ra1 Rhf8
23.Rh3 Rd7 24.f3 h5 25.Rg3 Ne6 26.Ra2 Rd3 27.Rc2 Rfd8 28.Nf1 h4 29.Rg4 h3
30.Rh4 hxg2 31.Kxg2 Nf4+ 32.Kf2 R3d1 33.Rh7 Nd3+ 34.Kg1 Ne1 35.Rf2 Rf8 36.Ncd2 Nd3
37.Rg2 Rc1 38.c4 Nd4 39.Rg4 Rc3 40.Rgh4 Ne1 41.R4h3 Nexf3+ 42.Kg2 Ne1+ 43.Kh1 Nd3
44.R7h8 Rxh8 45.Rxh8+ Kd7 46.Rf8 Ke6 47.Re8+ Kf6 48.Kg2 Nc5 49.h4 c6 50.h5 gxh5
51.Rh8 Ncxb3 52.Nxb3 Nxb3 53.Ng3 Rxc4 54.Rh6+ Kg5 55.Rh7 h4 56.Rg7+ Kf6 0-1

Description

given in 1997 from the ICGA site ^[6] :

The program AnMon (half ANgel, half deMON) is written in C and run under Windows NT. It was developed as a hobby for 8 years. AnMon participated in the 1995, and 1996 French Microcomputer Chess Championship. It is based on MTD(f) and uses null-move pruning, selective extensions, transposition tables, killer heuristic, and quiescence search. AnMon is a tactical program.

AnMon uses an opening book containing about 100.000 positions. It was established by the program. AnMon search about 50.000 nodes per second on a Pentium 2 at 233 MHz.

Forum Posts

AnMon 4.25 download ! by Frank Quisinsky, CCC, June 22, 1999
Anmon is Really Very Strong by Fernando Villegas, CCC, June 22, 1999
Anmon question ! Is anmon using alpha-beta ? by Thorsten Czub, CCC, August 16, 1999
AnMon 5.06 for Download by Đorđe Vidanović, CCC, February 01, 2000
ANMON won the computer chess tourney in Massy ! by Frank Quisinsky, Winboard Forum, May 23, 2000
UCI AnMon 5.19 by Christian Barreteau available! by Frank Quisinsky, CCC, February 26, 2002
Re: SCOTD (AnMon 5.21) by Kurt Utzinger, CCC, October 11, 2003
AnMon 5.40 by Christian Barreteau is available ... long text! by Frank Quisinsky, CCC, August 14, 2004
Changes in AnMon ... by Frank Quisinsky, CCC, August 15, 2004
AnMon 5.60 UCI available by Michael Diosi, CCC, January 30, 2006
New version of AnMon since 3 years ... by Leo Dijksman, CCC, February 03, 2009
AnMon 5.66 : 2436 by Patrick Buchmann, CCC, February 04, 2009
AnMon 5.75 : 2452 by Patrick Buchmann, CCC, July 24, 2009

External Links

Chess Engine

Misc

References

^ Support - ChessBase, May 28th, 2000
^ Arena Chess GUI 3.0 - AnMon
^ Santa Maria del Popolo in Rome, Italy: Chigi Chapel. Incrustated floor with the coats of arms of the House of Chigi hold by the Death, Photo by Bernd Brägelmann, Agostino Chigi from Wikipedia
^ Angels & Demons from Wikipedia
^ Massy 2002/05/26 - Tournoi de programmes d'Echecs from LUDOCHESS - Les jeux d'Echecs 100% pur Java by Stéphane Nguyen
^ AnMon's ICGA Tournaments

What links here?

Page	Date Edited
Amyan	Dec 10, 2013
AnMon	Nov 17, 2017
Arena	Mar 16, 2018
Bernard Brioit	Jan 10, 2015
Capture (program)	Jan 8, 2016
ChessBase	Nov 25, 2017
Christian Barreteau	Jan 8, 2016
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
FCCC 1995	Jul 27, 2015
FCCC 1996	Jul 25, 2014
FCCC 1998	Oct 22, 2012
FCCC 1999	Jan 29, 2013
FCCC 2000	Jan 26, 2013
FCCC 2004	Jun 16, 2013
Fernando Villegas	Aug 15, 2016
French Programmers Tournament	Jan 26, 2013
Fruit	Sep 27, 2016
Massy 2001	Jan 28, 2013
Massy 2002	Jan 2, 2018
Massy 2004	Oct 27, 2016
Massy 2005	Jan 29, 2013
Massy 2006	Jan 29, 2013
WMCCC 1997	Apr 4, 2017

Up one Level

Arasan

GerdIsenberg — Sun, 08 Apr 2018 18:38:18 GMT

Home * Engines * Arasan

அரசன்		Arasan, an open source engine written by Jon Dart in C++. Arasan's development started in the early 90s, the first version, released in 1994 was a 16-bit program running under Windows 3.1 using an 8x8 Board, incremental updated attack tables and its own GUI, evolving to a portable 32-bit and later 64-bit program, utilizing bitboards to determine its sliding piece attacks with rotated bitboard lookups. In 2008, rotated were replaced by Magic bitboards, which gave Arasan about a 20-25% speedup ^[1]. Despite its own GUI, Arasan early supported the Chess Engine Communication Protocol and later UCI as well, to run under Windows, Linux and Mac OS ^[2]. The latest version of Arasan and all major versions, including Version 1.0 from March 1994, are available as source code from the Arasan.org site ^[3] . Jon's change logs, bug fix reports and tournament reports over the time are available from forum archives, as well the recent ones from the Arasan blog ^[4]
அரசன் ^[5] (Arasan) , King in Tamil language ^[6]

Bitboard Trials

Jon Dart, May 1996 ^[7]

Lately I've been working on a new major release of Arasan. I have spent the last few months working on the search engine, trying to improve speed and performance. I tried some experiments with a bitboard move representation, but I have backed off on that for now.

With bitboards, I got a nice reduction in tree size (bitboards allow a more accurate swap-down analysis than I had before, and this improves move ordering and allows better "culling" of losing captures in the quiescence search).

However, currently the program relies pretty heavily on incrementally generated attack information, and I didn't have that implemented to work with bitboards, so I had to compute attacks as needed. Unfortunately, the current program "needs" to do this much more often than Crafty does, so the loss from computing attacks more than balanced out the gains from bitboards. This is fixable, I'm sure, but I've put off further work on it for now.

Magic Bitboards

Jon Dart, August 2008 ^[8] :

The main change has been to re-work the code to use "magic" bitboard logic instead of rotated bitboards. This has given about a 20-25% speedup. I have also had to re-write the evaluation function to take advantage of bitboard attack functions for king safety and mobility.

PEXT/PDEP Bitboards

Arasan 20.3, released in November 2017, performs PEXT/PDEP Bitboards if compiled for the BMI2 instruction set ^[9] to replace Fancy Magic Bitboards in looking up sliding piece attacks ^[10]

Automated Tuning

Arasan 19.2, released in November 2016, now applies Texel's Tuning Method by default and supports the Adam gradient descent algorithm ^[11] ^[12].

Tournament Play

Arasan went online in December, 1996 ^[13] , and played almost all major online computer chess tournaments, such as CCT Tournaments, ACCA Americas' Computer Chess Championship, ACCA World Computer Rapid Chess Championship, TCEC, and International Gsei Web Tournaments. Arasan 15.1 ^[14] won the ACCA 2012 ^[15] , Arasan 16.0 the WCRCC 2013 ^[16] . Over the board, Arasan is active at the CSVN Programmers Tournaments operated by Tessa Pijl. Arasan was runner-up behind The Baron in May 2014 at the PT 46 one point behind, as well in June 2015 at the PT 48 with the same score according to the tiebreak rules ^[17].

Photos & Games

PT 48, Two Kings fighting, Johan de Koning and Tessa Pijl in Arasan vs. The King ^[18]

[Event "PT 48"]
[Site "Leiden, NL"]
[Date "2015.06.14"]
[Round "7"]
[White "Arasan"]
[Black "The King"]
[Result "1-0"]
 
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 
9.a4 b4 10.Ne4 c5 11.Nxf6+ Nxf6 12.dxc5 Bxc5 13.e4 Bb7 14.Qe2 O-O 15.O-O e5 
16.Bg5 h6 17.Bh4 Qd6 18.Bg3 Rfe8 19.Rfd1 Re7 20.Bh4 Qc6 21.Rac1 Rc8 22.Rc4 Re6 
23.Bxf6 Rxf6 24.Rdc1 Qb6 25.Kh1 a5 26.Qc2 b3 27.Qe2 Qd6 28.R4c3 Rf4 29.g3 Rf6 
30.Bc4 Rb8 31.Rxb3 Bb4 32.Rd3 Qc7 33.Kg2 Rf8 34.Rdd1 Rc6 35.b3 Re8 36.Kg1 Rc8 
37.Rd5 Re6 38.Rd3 Rf6 39.Rcd1 Re8 40.Nh4 Qb6 41.Nf5 Rf8 42.Rf3 Kh8 43.Nh4 Kg8 
44.Rd7 Bc8 45.Rd5 Rd6 46.Rxd6 Qxd6 47.Rd3 Qc7 48.Qh5 Kh7 49.Nf3 f6 50.Nh4 Bd7 
51.Bf7 Bc8 52.Bg6+ Kg8 53.Bf5 Qc2 54.Qf3 Re8 55.Kg2 Rf8 56.Rd5 Bc5 57.Bxc8 Rxc8 
58.Rd7 Bf8 59.Qg4 h5 60.Qg6 Qe2 61.Nf3 Qc2 62.Qf7+ Kh8 63.Qxh5+ Kg8 64.Nd2 Rb8 
65.g4 Rc8 66.Qf7+ Kh8 67.Qh5+ Kg8 68.Qg6 Kh8 69.Qf5 Kg8 70.g5 fxg5 71.Nf3 Qc6 
72.Nxg5 Qh6 73.Rd3 Rc7 74.Rf3 Bb4 75.Rh3 Bf8 76.Rxh6 1-0

Forum Posts

1995 ...

Arasan 2.0 (Windows chess program) available via ftp by Jon Dart, rec.games.chess, July 4, 1995
Arasan 2.1 (Windows chess program) available via ftp by Jon Dart, rec.games.chess.misc, October 23, 1995
Arasan 2.2 (Windows chess program) available via ftp by Jon Dart, rec.games.chess.misc, December 10, 1995
Arasan progress report by Jon Dart, rgcc, May 23, 1996
Arasan 3.0 (Windows chess program) available by Jon Dart, rgcc, July 8, 1996
Arasan goes online by Jon Dart, rgcc, January 6, 1997
Arasan 4.0 is available by Jon Dart, rgcc, July 15, 1997
Arasan 5.0 released by Jon Dart, CCC, January 13, 1999

2000 ...

Arasan 5.4 released by Jon Dart, CCC, May 25, 2000
Arasan vs. IM Paunovic by Jon Dart, CCC, June 16, 2000
Arasan now under Linux by Jon Dart, CCC, September 02, 2000
A few notes from Arasan's games in CCT2 by Jon Dart, CCC, November 05, 2000 » CCT2
CCT4 notes - Arasan by Jon Dart, CCC, January 20, 2002 » CCT4
Arasan 6.0 by Jon Dart, CCC, September 24, 2002
Arasan 6.3 by Jon Dart, CCC, January 26, 2003
Arasan 7.0 by Jon Dart, CCC, August 09, 2003
Arasan 7.4 by Jon Dart, CCC, February 28, 2004
Arasan 7.4 64-bit Speedup by Slater Wold, CCC, March 30, 2004
Arasan 8.0 by Jon Dart, CCC, August 22, 2004
Arasan 8.2 by Jon Dart, CCC, November 26, 2004

2005 ...

Arasan 8.4 by Jon Dart, CCC, February 26, 2005
Arasan in CCT8 by Jon Dart, CCC, February 26, 2006 » CCT8
Arasan @ WCRCC tournament by Jon Dart, CCC, July 23, 2007 » WCRCC 2007
Arasan 10.0 by Jon Dart, CCC, September 02, 2007
Arasan 10.2 by Jon Dart, CCC, February 16, 2008
Arasan 10.4 by Jon Dart, CCC, June 27, 2008
Arasan 11.0 by Jon Dart, CCC, November 28, 2008
Arasan 11.3 by Jon Dart, CCC, March 24, 2009
Arasan 11.4 by Jon Dart, CCC, June 20, 2009
Arasan 11.5 by Jon Dart, CCC, September 05, 2009
Arasan 11.6 by Jon Dart, CCC, November 18, 2009

2010 ...

Arasan 11.7 by Jon Dart, CCC, February 07, 2010
Arasan 12.0 released by Jon Dart, CCC, August 07, 2010
Arasan 12.2 released by Jon Dart, CCC, November 11, 2010

2011

Arasan 12.3 released by Jon Dart, CCC, February 02, 2011
Arasan 13.0 by Jon Dart, CCC, August 18, 2011
Arasan 13.1 by Jon Dart, CCC, August 23, 2011
MORE about Arasan 13.1 by Fernando Villegas, CCC, August 26, 2011
Arasan 13.2 by Jon Dart, CCC, October 02, 2011
Arasan 13.3 by Jon Dart, CCC, November 14, 2011 » ACCA 2011
Arasan 13.4 by Jon Dart, CCC, December 07, 2011

2012

Arasan 14.0 by Jon Dart, CCC, March 04, 2012
Arasan 14.2 by Jon Dart, CCC, June 12, 2012
Arasan 14.3 by Jon Dart, CCC, July 18, 2012
Arasan 15.0 by Jon Dart, CCC, September 20, 2012
Arasan 15.1 by Jon Dart, CCC, November 19, 2012

2013

Arasan 15.2 by Jon Dart, CCC, February 26, 2013
Arasan 15.4 by Jon Dart, CCC, April 24, 2013
Arasan 15.6 by Jon Dart, CCC, May 21, 2013
Arasan on github by Jon Dart, CCC, May 22, 2013 ^[19]
Arasan games from WCRCC by Jon Dart, CCC, July 21, 2013 » WCRCC 2013
Arasan 16.0 by Jon Dart, CCC, July 24, 2013
Arasan 16.1 by Jon Dart, CCC, September 01, 2013
Arasan 16.2 by Jon Dart, CCC, October 25, 2013
Arasan 16.3 by Jon Dart, CCC, December 06, 2013

2014

test position: Rookie-Arasan by Jon Dart, CCC, January 27, 2014 » Rookie, Zugzwang
Arasan 17.0 by Jon Dart, CCC, March 27, 2014
Arasan GUI fixes by Jon Dart, CCC, April 02, 2014
Arasan 17.1 by Jon Dart, CCC, May 07, 2014
Arasan 17.2 by Jon Dart, CCC, May 30, 2014
Arasan 17.3 by Jon Dart, CCC, September 01, 2014
Arasan 17.4 by Jon Dart, CCC, October 08, 2014

2015 ...

Arasan 17.5 by Jon Dart, CCC, January 24, 2015
Experiments with eval tuning by Jon Dart, CCC, March 10, 2015 » Automated Tuning, Texel's Tuning Method
Arasan 18.0 by Jon Dart, CCC, July 30, 2015
Arasan 18.1 by Jon Dart, CCC, November 02, 2015
Arasan 18.2 by Jon Dart, CCC, December 03, 2015

2016

Arasan 18.3 by Jon Dart, CCC, February 02, 2016
Arasan Syzygy support (working with Windows, too) by Jon Dart, CCC, March 10, 2016 » Syzygy Bases
Arasan 19.0 + updated test suite by Jon Dart, CCC, April 29, 2016
Arasan 19.1 by Jon Dart, CCC, August 09, 2016
Arasan 19.2 by Jon Dart, CCC, November 03, 2016

2017

Arasan 20.0 by Jon Dart, CCC, January 31, 2017
building for Android by Jon Dart, CCC, April 19, 2017 » Android
Arasan 20.1 by Jon Dart, CCC, April 28, 2017
Arasan Programmer's Guide by Jon Dart, CCC, June 21, 2017
Arasan 20.2 by Jon Dart, CCC, July 15, 2017
Arasan 20.3 by Jon Dart, CCC, November 05, 2017

2018

Arasan 20.4 by Jon Dart, CCC, January 03, 2018
Arasan 20.4.1 by Jon Dart, CCC, January 05, 2018
Arasan 20.5 by Jon Dart, CCC, April 08, 2018

External Links

Chess Engine

Arasan Chess by Jon Dart
Arasan Programmer's Guide by Jon Dart ^[20]
Arasan Test Suite
Arasan 8.4 released, short interview with Jon Dart by Frank Quisinsky, March 01, 2005, Arena Chess GUI, Archive 5, 72
jdart1/arasan-chess · GitHub ^[21]
Arasan 17.0 64-bit in CCRL 40/40
Arasan 18.0 64-bit in CCRL 40/40

Misc

References

^ Arasan Blog - Aug 26, 2008
^ Arasan chess
^ Arasan Downloads
^ Arasan Tech Blog
^ Tamil script from Wikipedia
^ அரசன் (சதுரங்கம்) - தமிழ் விக்கிப்பீடியா
^ Arasan progress report by Jon Dart, rgcc, May 23, 1996
^ Arasan Blog - Aug 26, 2008
^ Arasan 20.3 by Jon Dart, CCC, November 05, 2017
^ arasan_source20.3.zip/src/attacks.h
^ Arasan 19.2 by Jon Dart, CCC, November 03, 2016
^ Diederik P. Kingma, Jimmy Lei Ba (2015). Adam: A Method for Stochastic Optimization. arXiv:1412.6980v8, ICLR 2015
^ Arasan goes online by Jon Dart, rgcc, January 6, 1997
^ Arasan 15.1 by Jon Dart, CCC, November 19, 2012
^ Seventh Annual ACCA Americas' Computer Chess Championships by Jon Dart, CCC, November 18, 2012
^ Arasan games from WCRCC by Jon Dart, CCC, July 21, 2013
^ Baron 1st, Arasan 2nd by Jon Dart, CCC, June 14, 2015
^ PT48 Round 7
^ jdart1/arasan-chess · GitHub
^ Arasan Programmer's Guide by Jon Dart, CCC, June 21, 2017
^ Arasan on github by Jon Dart, CCC, May 22, 2013

What links here?

Page	Date Edited
1st CSVN OIT	May 18, 2014
Abrok	Nov 28, 2014
ACCA 2006	Jul 14, 2014
ACCA 2007	Jul 14, 2014
ACCA 2008	Jul 14, 2014
ACCA 2009	Jul 14, 2014
ACCA 2010	Jul 14, 2014
ACCA 2011	Jul 14, 2014
ACCA 2012	Jul 14, 2014
ACCA Americas' Computer Chess Championship	Nov 20, 2014
ACCA World Computer Rapid Chess Championship	Jun 27, 2017
Alaric	Mar 4, 2014
Alfil	Sep 3, 2015
Android	Jan 9, 2018
Arasan	Apr 8, 2018
Automated Tuning	Feb 27, 2018
CCT10	May 5, 2013
CCT11	Feb 17, 2015
CCT13	Dec 6, 2013
CCT14	Aug 23, 2012
CCT15	Oct 21, 2014
CCT16	May 13, 2014
CCT2	Sep 7, 2012
CCT3	Feb 14, 2013
CCT4	Apr 22, 2013
CCT5	Feb 22, 2013
CCT6	May 29, 2014
CCT7	Dec 16, 2017
CCT8	Apr 6, 2013
CCT9	Aug 25, 2013
DGT Pi	Oct 22, 2017
Donna	Aug 17, 2017
Eigenmann Endgame Test	Jun 1, 2017
Engine releases	Apr 23, 2018
Engines	Mar 10, 2018
Fernando Villegas	Aug 15, 2016
Hossa	Jan 7, 2016
IGT 2017	Oct 2, 2017
IGWT 2013	Jun 23, 2014
IGWT 2014	Feb 2, 2016
IGWT III	May 15, 2017
IGWT IV	May 17, 2017
Jon Dart	Dec 17, 2017
King	Feb 26, 2013
Leila	May 8, 2017
Magic Bitboards	Apr 13, 2018
MessChess	Mar 6, 2014
Neural Networks	Mar 12, 2018
Nightmare NL	Dec 12, 2016
Pepito	Nov 27, 2014
PicoChess	Mar 12, 2018
Pseudorandom number generator	May 11, 2017
PT 46	Dec 9, 2014
PT 47	Dec 1, 2014
PT 48	Oct 15, 2015
PuppetMaster	Sep 17, 2015
Recommended Reading	Nov 17, 2017
RomiChess	Jan 2, 2018
Rookie	Jan 7, 2016
RuyTune	Jun 8, 2017
Syzygy Bases	Apr 19, 2018
TCEC Season 10	Jan 3, 2018
TCEC Season 11	Apr 18, 2018
TCEC Season 5	Jun 2, 2014
TCEC Season 6	Dec 2, 2014
TCEC Season 7	Jan 23, 2015
TCEC Season 8	Nov 30, 2015
TCEC Season 9	Nov 6, 2017
Terra	Feb 11, 2015
Tessa Pijl	Oct 28, 2017
Test-Positions	Feb 25, 2018
Texel's Tuning Method	Dec 2, 2017
WCRCC 2007	Nov 21, 2016
WCRCC 2008	Nov 21, 2016
WCRCC 2010	Jul 14, 2014
WCRCC 2012	Jul 14, 2014
WCRCC 2013	Jul 14, 2014
WCRCC 2014	Jul 27, 2014
WCRCC 2015	Jul 19, 2015
WCRCC 2016	Jun 27, 2017
WCRCC 2017	Jun 27, 2017
Witchess	Apr 22, 2015
Zugzwang	Dec 8, 2017

Up one Level

Ares US

GerdIsenberg — Tue, 20 Sep 2016 20:47:18 GMT

Home * Engines * Ares

		Ares, an UCI compliant chess engine by Charles Roberson released in 2009 in honor of the NASA Ares I-X space rocket ^[1]. It runs under Windows and was developed under Linux.
Ares I-X ^[2]

Namesake

Ares by Frans van Gool and Erik Leenders

Forum Posts

Ares 1.0 in honor of the NASA Ares I-X Space Rocket by Charles Roberson, CCC, October 31, 2009
Test tournament: Ares by Harun Taner, CCC, December 22, 2009
Ares 1.004 by Charles Roberson, CCC, April 24, 2010
Ares 1.004 : 2273 - ChessMind 0.80 : 2049 by Patrick Buchmann, CCC, May 01, 2010 » ChessMind
Ares 1.005 available by Charles Roberson, CCC, May 23, 2014
New Ares Coming by Charles Roberson, CCC, October 28, 2015

External Links

Chess Engine

Ares Chess 1.005.2 by Charles Roberson
Ares Chess 1.005 by Charles Roberson
Charles Roberson Ares-Page hosted by Thorsten Czub
Ares 1.005 64-bit in CCRL 40/40

Misc

References

^ Ares 1.0 in honor of the NASA Ares I-X Space Rocket by Charles Roberson, CCC, October 31, 2009
^ Rollout of Ares I-X at Kennedy Space Center Launch Complex 39 secured by four bolts on a mobile launcher platform, Author: NASA/Kim Shiflett, Source: NASA Kennedy Media Gallery, Ares I-X from WIkipedia

What links here?

Page	Date Edited
Ares	Jun 9, 2016
Ares US	Sep 20, 2016
Charles Roberson	Jan 7, 2016
ChessMind	Sep 20, 2016
Engine releases	Apr 23, 2018
Engines	Mar 10, 2018
Harun Taner	May 17, 2015
NoonianChess	Jan 7, 2016
Telepath	Jul 14, 2014

Up one Level

Arion

GerdIsenberg — Fri, 28 Nov 2014 16:22:44 GMT

Home * Engines * Arion

		Arion, an UCI compliant chess engine by Gabriel Guillory, written in C++, first released in December 2004. Arion had its over the board debut at the Seventh French Programmers Tournament, Massy 2005, and otherwise participates at Le Fou numérique and other rating lists.
Arion on a Dolphin ^[1]

Features

^[2]

Bitboards
Legal Move Generation
Iterative Deepening
NegaScout
Aspiration Windows
Transposition Table
Null Move Pruning
Futility Pruning
MVV/LVA
Razoring
Internal Iterative Deepening
History Heuristic
Killer Heuristic
Extensions (Standard & Non-standard)
Static Exchange Evaluation (Simple + Full)
Enhanced Transposition Cutoff
History Pruning
Lazy Evaluation
Adaptive Contempt Factor
Pondering
PGN analyzer
Perft

Forum Posts

questions about the new Arion engine by Dave, Winboard Forum, December 14, 2004
Arion 1.3 : 2359 by Patrick Buchmann, Winboard Forum, March 11, 2005
Arion 1.6 by Gabriel Guillory, Winboard Forum, September 09, 2005
Arion 1.7 + PgnScanner 0.32 by Gabriel Guillory, Winboard Forum, March 07, 2006
New link for Arion and PgnScanner by Gabriel Guillory, Winboard Forum, July 26, 2006

External Links

Chess Engine

Misc

References

^ Arion on a Dolphin, watercolor painting by Matthäus Kern, Illustration for Joseph Christian Freiherr von Zedlitz (1841). Der arme Sänger. (German)
^ based on Arion chess program, slightly edited

What links here?

Page	Date Edited
Arion	Nov 28, 2014
Dolphin	Nov 28, 2014
Engines	Mar 10, 2018
Gabriel Guillory	Sep 9, 2016
Massy 2005	Jan 29, 2013

Up one level

Aristarch

GerdIsenberg — Thu, 08 May 2014 15:14:20 GMT

Home * Engines * Aristarch

		Aristarch, a chess engine by Stefan Zipproth, compliant to the Chess Engine Communication Protocol as well as the Universal Chess Interface, running under Windows. The development of Aristarch already started in 1995 and was first written in Basic, version 2 was mainly a C port, but version 3 was a complete rewrite in C++, using a strictly object oriented design, utilizing bitboards to represent the board, and apparently rotated bitboards to generate sliding piece attacks. Version 4.0 includes several improvements, the most important being a completely new pawn evaluation routine ^[1], it otherwise has a rather speculative king safety evaluation. Beside commonly known search extensions and reductions, Version 4.21 introduced an original pruning method based on 8 simple conditions ^[2]. Aristarch played the CCT4 and CCT5 online tournaments.
Aristarchus of Samos ^[3]

Etymology

The name of the engine has its origin in the ancient Greek astronomer and mathematician Aristarchus of Samos (310 BCE - ca. 230 BCE) ^[4], who presented the first known model of Heliocentrism that placed the Sun at the center of the known universe with the Earth revolving around it. He calculated the sizes of the Sun and Moon, as well as their distances from the Earth in terms of Earth's radius.

Forum Posts

Exiciting Aristarch by Sune Larsson, CCC, August 05, 2002
Re: To Stefan Zipproth (Aristarch) by Stefan Zipproth, CCC, August 07, 2002
Amateur vs Prof: Aristarch 4.4 vs Nimzo 7.32 (2) by Kurt Utzinger, CCC, August 10, 2002
Re: who is Aristarch ? by John Merlino, CCC, August 12, 2002
Amateurs vs Professionals (Aristarch 4.4 vs Nimzo 7.32) 7,0-14,0 by Kurt Utzinger, CCC, August 16, 2002
List 512 UCI und Aristarch 4.37 ready for Download by Andreas Aicher, CCC, January 26, 2004
Nice win from Aristarch 4.50 by Graham Banks, CCC, April 21, 2008
A New Version Of Aristarch by David Schumaker, CCC, December 02, 2010

External Links

Chess Engine

Chess engines... Aristarch, List
About Aristarch
Inside Aristarch
Aristarch of Samos from Chess engines...

Misc

References

^ About Aristarch
^ Inside Aristarch
^ Aristarchos of Samos, monument at Aristotle University of Thessaloniki, Photo by Dr. Manuel, Aristarchos von Samos, Wikipedia.de (German)
^ About Aristarch

What links here?

Page	Date Edited
Aristarch	May 8, 2014
CCT4	Apr 22, 2013
CCT5	Feb 22, 2013
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
List (Program)	Jan 7, 2016
Mathematician	Apr 9, 2018
Stefan Zipproth	Jul 26, 2016

Up one Level

asmFish

GerdIsenberg — Wed, 14 Feb 2018 19:45:35 GMT

Home * Engines * Stockfish * asmFish

		asmFish, a port of Stockfish in x86-64 assembly by Mohammed Li, optional using AVX2 and BMI2 instructions, assembled with FASM to run under Windows or UNIX/Linux, first released in June 2016. The fun project is about to demonstrate how an experienced assembly programmer can optimize a program compared with GCC ^[1] . A few structural optimizations were also applied, such as elimination of piece lists as already tried in Stockfish ^[2] . Critical functions in asmFish do not conform to the x86-64 ABI concerning register usage and calling convention ^[3]. Some less time critical code was ported using GCC generated assembly output, such as Ronald de Man's probing code for Syzygy Bases. asmFish further supports large pages, and its parallel search is numa aware ^[4] ^[5] .
Istiophorus platypterus, one of the world's fastest fish ^[6]

Forum Posts

2015

[for fun] rewrite of stockfish into asm and question on source by Mohammed Li, FishCooking, January 09, 2015
Re: [for fun] rewrite of stockfish into asm and question on source by Mohammed Li, FishCooking, April 18, 2016

2016

new humanistic compile of SF is 108KB by Mohammed Li, FishCooking, May 28, 2016
Re: Speedup and simplicity idea by Mohammed Li, FishCooking, June 28, 2016
ASM Fish for Linux and Windows by Norbert Raimund Leisner, CCC, July 26, 2016
asmFish 44 cores by A. Turkoglu, FishCooking, August 28, 2016
Scaling of Asmfish with large thread count by Dann Corbit, CCC, October 07, 2016 » Parallel Search
New asmFish released by Stefan Pohl, CCC, November 04, 2016

2017 ...

Reaching Lyudmil Antonov by Art Ford, CCC, January 23, 2017
asmfish_macOS_11082017 by Michael B, CCC, November 08, 2017
asmFish update - all flavors of OS by Michael B, CCC, January 20, 2018
Re: asmFish update - all flavors of OS by T. Poppins, CCC, January 23, 2018
New asmfish by Günther Simon, CCC, February 12, 2018

External Links

Chess Engine

Misc

Yes - We Have Heaven, Long Distance Runaround, The Fish (Schindleria Praematurus), Album Fragile (1971), YouTube Video

References

^ Re: [for fun] rewrite of stockfish into asm and question on source by Mohammed Li, FishCooking, April 18, 2016
^ removal of piece lists by Mohammed Li, FishCooking, November 11, 2014
^ Agner Fog's manuals
^ asm/readme.txt at master · tthsqe12/asm · GitHub
^ lets get the ball moving down the field on numa awareness by Mohammed Li, FishCooking, August 30, 2016
^ Istiophorus platypterus, Image by Citron, March 2010, CC BY-SA 3.0, Wikimedia Commons, Sailfish from Wikipedia, Indo-Pacific sailfish from Wikipedia

What links here?

Page	Date Edited
asmFish	Feb 14, 2018
Assembly	Sep 3, 2017
CFish	Feb 1, 2018
Engines	Mar 10, 2018
Lyudmil Antonov	Aug 31, 2017
Memory	Dec 8, 2017
Parallel Search	Dec 30, 2017
Portfish	Sep 8, 2016
Stockfish	Apr 7, 2018
x86-64	Mar 6, 2018

Up one Level

Asterisk

GerdIsenberg — Thu, 24 Mar 2016 20:07:32 GMT

Home * Engines * Asterisk

*		Asterisk, an UCI and WinBoard ^[1] compliant chess program written by Péter Horváth in C. Its development started in early 2002 ^[2], already released in March 2002 ^[3]. Asterisk is presumably the Windows successor of Péter's earlier MS-DOS program Robin. Since 2002, Asterisk played all six Hungarian Chessprogram Open, and was tied first at MASPV 2007, and runner-up at the MASPV 2008.

Etymology

Asterisk, from Late Latin asteriscus, from Ancient Greek ἀστερίσκος (asteriskos, “a little star, asterisk, used in manuscripts to mark passages”), diminutive of ἀστήρ (aster, “a star”) ^[4] . In computer science, the asterisk is commonly used as a wildcard character, or to denote pointers, repetition, or multiplication ^[5]. Inside the Portable Game Notation Standard, an asterisk character ("*") is a token by itself. It is used as one of the possible game termination markers. It indicates an incomplete game or a game with an unknown or otherwise unavailable result ^[6] .

Photos & Games

MASPV 2003, round 3, Asterisk - Merlin ^[7], Péter Horváth and Balázs Jákó ^[8]

[Event "MASPV 2003"]
[Site "Sopron, Hungary"]
[Date "2003.04.19"]
[Round "3"]
[White "Asterisk"]
[Black "Merlin V1.0"]
[Result "1-0"]
 
1.Nf3 Nf6 2.Nc3 d6 3.d4 d5 4.Bf4 Bf5 5.e3 c6 6.Bd3 e6 7.Bxf5 exf5
8.Qd3 Ne4 9.O-O Be7 10.a4 O-O 11.Ne2 Na6 12.Qb3 Qc8 13.Rfd1 Re8
14.c4 Nb4 15.Rac1 Qe6 16.c5 a5 17.Bc7 Bd8 18.Bxd8 Raxd8 19.Nf4 Qh6
20.Qa3 Re7 21.Qb3 Rde8 22.Nh3 Kh8 23.Ne5 Ng5 24.Nf4 Ne4 25.Nfd3 f6
26.Nf3 Nxd3 27.Rxd3 f4 28.Rf1 Qg6 29.exf4 Qf5 30.g3 Qh3 31.Re3 Qg4
32.Rfe1 Qh3 33.Qb6 Ra8 34.Nh4 g5 35.fxg5 fxg5 36.Nf3 Kg8 37.R1e2 Nd2
38.Nxd2 Rxe3 39.Rxe3 Qd7 40.Rb3 Rf8 41.Qxa5 Qe7 42.Rf3 Qe1+ 43.Kg2
Rxf3 44.Kxf3 Kf7 45.Qc7+ Kg6 46.Qxb7 Qxd2 47.Qxc6+ Kg7 48.Qxd5 Qxb2
49.Qxg5+ Kf7 50.Qf5+ Ke8 51.Qe4+ Kd8 52.Qd5+ Ke7 53.Qe5+ Kf7 54.Qf5+
Ke8 55.Qe6+ Kf8 56.Qf6+ Kg8 57.Qe6+ Kf8 58.Qf6+ Kg8 59.Qd8+ Kf7
60.Qd7+ Kf8 61.Qd6+ Kf7 62.Qd7+ Kf6 63.Qd8+ Kf7 64.Qc7+ Kg8 65.Qd7
h6 66.Qe8+ Kg7 67.Qe7+ Kh8 68.Qf8+ Kh7 69.Qf7+ Kh8 70.Qe8+ Kg7
71.Qd7+ Kf6 72.Qd8+ Kf7 73.Qc7+ Kf8 74.Qd7 Qc3+ 1-0

Forum Posts

new hungarian wb engine : Asterisk by WYx, Winboard Forum, March 05, 2002
Re: WB/UCI chronology pages updated and reworked by Péter Horváth, Winboard Forum, August 12, 2007

External Links

Chess Engine

Asterisk old homepage from Wayback Machine
Asterisk from WBEC Ridderkerk
Asterisk 0.6 in KCEC
Index of /chess/engines/Norbert's collection/Asterisk 0.6 compiled by Norbert Raimund Leisner, hosted by Kirill Kryukov

Misc

References

^ MASPV 2007
^ MASPV 2002
^ new hungarian wb engine : Asterisk by WYx, Winboard Forum, March 05, 2002
^ asterisk - Wiktionary
^ Asterisk from Wikipedia
^ Standard: Portable Game Notation Specification and Implementation Guide by Steven Edwards
^ MASPV 2003 - PGN, PGN has 0-1, MASPV 2003 results 1-0?
^ MASPV 2003 photos

What links here?

Page	Date Edited
Asterisk	Mar 24, 2016
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
Hussar	Mar 27, 2016
MASPV 2002	Jan 9, 2013
MASPV 2003	Jan 9, 2013
MASPV 2004	Jan 9, 2013
MASPV 2007	May 5, 2013
MASPV 2008	May 5, 2013
MASPV 2009	May 6, 2013
Péter Horváth	Mar 24, 2016
Robin	Dec 15, 2017

Up one Level

Atlas (ESP)

GerdIsenberg — Sun, 28 Jan 2018 09:27:00 GMT

Home * Engines * Atlas

		Atlas, an UCI compliant chess engine by Andrés Manzanares Campillo written in C++, with executables running under Linux and Windows. The development of Atlas started in 2004, initially representing the board as 0x88 vector attacks mailbox along with piece-lists, supporting WinBoard, and written in C. Atlas 2.90 was a complete rewrite released in June 2011, a bitboard approach only supporting UCI ^[1].
Sculpture of Atlas ^[2]

Features

^[3]

Board Representation

Search

Iterative Deepening
Aspiration Windows (unsymmetrical)
Principal Variation Search
Quiescence Search
Null Move Pruning with R==3 and Verification
Futility Pruning
SEE Pruning
Late Move Reductions
Check Extensions
Singular Extensions (3.90)
Transposition Table
History Heuristic

Evaluation

Namesake

Atlas by Alex Bell

Forum Posts

2005 ...

Atlas 2 Winboard Engine crashes in Arena GUI by Marc Darius, Winboard Forum, April 20, 2005
Atlas 2.20 hash usage by Graham Banks, Winboard Forum, August 27, 2006
Confused with Atlas 2.20- Help Appreciated by George Speight, Winboard Forum, January 12, 2007

2010 ...

Atlas 3.60 Release by Andrés Manzanares, CCC, November 18, 2013
Atlas 3.70em Release by Andrés Manzanares, CCC, July 20, 2014

2015 ...

Atlas 3.80 release by Andrés Manzanares, CCC, February 06, 2015
Atlas 3.90 release by Andrés Manzanares, CCC, January 22, 2018
Atlas 3.91 (bugfix version) by Andrés Manzanares, CCC, January 26, 2018

External Links

Chess Engine

Misc

References

^ Progreso - Atlas
^ Sculpture of Atlas, Praza do Toural, Santiago de Compostela, Photo by Luis Miguel Bugallo Sánchez, October 18, 2005, CC BY-SA 3.0, Wikimedia Commons, Atlas (mythology) from Wikipedia
^ Features of Atlas 3.80 based on Atlas - Home and Atlas 3.80 release by Andrés Manzanares, CCC, February 06, 2015
^ Atlas - Home - Agradecimientos

What links here?

Page	Date Edited
Andrés Manzanares Campillo	Nov 6, 2017
Atlas	Nov 5, 2017
Atlas (ESP)	Jan 28, 2018
Engine releases	Apr 23, 2018
Engines	Mar 10, 2018

Up one Level

Ayito

GerdIsenberg — Sat, 06 Apr 2013 09:04:00 GMT

Home * Engines * Ayito

Ayito,
a WinBoard and later UCI and Chess960 compliant chess engine written by Jaime Benito de Valle Ruiz in C++, first released in May 2004 ^[1]. Ayito played the Chess960CWC 2005 in Mainz, the DOCCC 2005 in Leiden and the CPT 2008 in Hoogstraten-Wortel.

Selected Games

DOCCC 2005, round 8, Ayito - Neurosis ^[2]

[Event "DOCCC 2005"]
[Site "Leiden NED"]
[Date "2005.11.13"]
[Round "08"]
[White "Ayito"]
[Black "Neurosis"]
[Result "1-0"]
 
1.d4 g6 2.e4 Bg7 3.Nc3 d6 4.Bg5 h6 5.Be3 Nf6 6.Nf3 O-O 7.h3 Kh7 8.Be2
b6 9.O-O Bb7 10.Bd3 Nbd7 11.Qe2 c5 12.Ba6 Bxa6 13.Qxa6 cxd4 14.Bxd4 Qc8 
15.Qb5 e5 16.Be3 Nc5 17.Bxc5 bxc5 18.b3 Rb8 19.Qe2 Qc6 20.Rfd1 Rfd8 
21.Qc4 Rd7 22.a3 Rbd8 23.Nd5 a6 24.Nxf6+ Bxf6 25.Rd5 Rc8 26.Rad1 Kg7 
27.Nd2 Be7 28.Qc3 f6 29.h4 h5 30.Nc4 Rcd8 31.Qg3 Kh7 32.f4 Rc7 33.R1d3 
Rcd7 34.Qf2 exf4 35.Qxf4 Kg7 36.Rg3 Kf7 37.Rd1 Re8 38.Rf1 Rf8 39.e5 Ke8 
40.Qh6 d5 41.exf6 Bxf6 42.Ne5 Bg7 43.Rxf8+ Bxf8 44.Qf4 Qb7 45.Nxd7 Qxd7 
46.Rxg6 Qe7 47.Kf2 Qe4 48.Qxe4+ 1-0

Forum Posts

Ayito: A new Winboard engine. But this one is unique.... by Jaime Benito de Valle Ruiz, Winboard Forum, May 07, 2004
Ayito: A new Winboard engine. But this one is unique.... by Jaime Benito de Valle Ruiz, CCC, May 07, 2004

External Links

Ayito from WBEC Ridderkerk
Ayito 0.2.994 in KCEC
Ayito 0.2.994 in CCRL 40/40
The chess games of Ayito from chessgames.com

References

What links here?

Page	Date Edited
Ayito	Apr 6, 2013
Chess960CWC 2005	Jan 1, 2016
CPT 2008	Nov 6, 2014
DOCCC 2005	Aug 15, 2015
Eigenmann Endgame Test	Jun 1, 2017
Engines	Mar 10, 2018
Jaime Benito de Valle Ruiz	Apr 7, 2016

Up one level

Wikispaces : chessprogramming - items matching description

Abrok

Table of Contents

Forum Posts

External Links

References

What links here?

Abulafia

Table of Contents

See also

Forum Posts

External Links

Chess Engine

Misc

References

What links here?

Adam

Table of Contents

See also

Forum Posts

External Links

Chess Engine

Misc

References

What links here?

AICE

Table of Contents

Etymology

Features

See also

Forum Posts

External Links

Chess Engine

Misc

References

What links here?

Alaric

Table of Contents

Etymology

Tournament Play

Selected Games

CCT9

WCRCC 2008

See also

Forum Posts

External Links

Chess Engine

Misc

References

What links here?

Alfil

Table of Contents

C# Engine Project

Selected Games

See also

Forum Posts

2007 ...

2010 ...

2015 ...

External Links

Chess Engine

Misc

References

What links here?

AliChess

Table of Contents

Forum Posts

External Links

References

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Amoeba

Table of Contents

Features

Board Representation

Search

Evaluation

Tournament Manager

See also

Forum Posts

2016