Donna

**[[Home]] * [[Engines]] * Donna**
|| [[image:DonatasLapienis.jpg link="http://lksf.lt/lt/archyvas"]] ||~   || **Donna**,
an [[UCI]] compliant, experimental [[Open Source Engines|open source chess engine]] by [[Michael Dvorkin]], written in the [[Go (Programming Language)|Go programming language]], freely distributable under the terms of [[Massachusetts Institute of Technology#License|MIT license]] and first released in December 2014.

Donna is dedicated to [[http://en.wikipedia.org/wiki/Lithuania|Lithuanian]] chess grandmaster [[https://lt.wikipedia.org/wiki/Donatas_Lapienis|Donatas Lapienis]] (April 8, 1936, [[https://en.wikipedia.org/wiki/Kaunas|Kaunas]] - April 10, 2014, [[https://en.wikipedia.org/wiki/Vilnius|Vilnius]] <ref>[[http://www.chessfed.lt/2014/04/in-memoriam-donatas-lapienis-1936-04-08-2014-04-10/|In memoriam Donatas Lapienis (1936.04.08 – 2014.04.10) «Lietuvos šachmatų federacija]]</ref> ), who was Michael Dvorkin's chess teacher. In the mid 80s, Donatas Lapienis was highest ranked [[https://en.wikipedia.org/wiki/Correspondence_chess|correspondence chess]] player in the world with an [[https://en.wikipedia.org/wiki/Elo_rating_system|Elo rating]] of 2715 <ref>[[https://github.com/michaeldv/donna|michaeldv/donna · GitHub]] Readme</ref> . ||
|| Donatas Lapienis <ref>Image from [[http://lksf.lt/lt/archyvas|Lietuvos korespondencinių šachmatų federacija]] (Lithuania correspondence chess federation)</ref> ||~   ||^   ||
[[toc]]
=Acknowledgments= 
Michael Dvorkin thanks his friend chess grandmaster [[https://en.wikipedia.org/wiki/Eduardas_Rozentalis|Eduardas Rozentalis]], who inspired him to write a chess engine. Donna would never have been possible without the open source authors of their respective engines <ref>[[https://github.com/michaeldv/donna|michaeldv/donna · GitHub]] Readme</ref> :
* [[Aaron Becker]] of [[Daydreamer]]
* [[Fabien Letouzey]] of [[Senpai]]
* [[Igor Korshunov]] of [[Murka]]
* [[Jon Dart]] of [[Arasan]]
* [[Steve Maughan]] of [[Maverick]]
* [[Tom Kerrigan]] of [[TSCP]]
* [[Tord Romstad]], [[Marco Costalba]], [[Joona Kiiski]] of [[Stockfish]]
* [[Vadim Demichev]] of [[GullChess|Gull]]
* [[Vladimir Medvedev]] of [[GreKo]]

=Features= 
According to the Donna [[https://github.com/michaeldv/donna|README]] file:
==[[Data|Data Structures]]== 
* [[Magic Bitboards]]
* [[Transposition Table]]
* [[Material Tables|Material Imbalance Table]]
* [[Pawn Hash Table|Pawn Cache]]
==[[Search]]== 
* [[Root]], [[Search Tree|Tree]], and [[Quiescence Search|Quiescence]] Search
* [[Aspiration Windows]]
* [[Iterative Deepening]]
* [[Extensions]]
* [[Alpha-Beta]]
* [[Mate Distance Pruning]]
* [[Razoring]]
* [[Futility Pruning]]
* [[Null Move Pruning]]
* [[Late Move Reductions]]
* [[Delta Pruning]]
* [[Killer Heuristic]]
* [[Material#InsufficientMaterial|Insufficient Material]]
* [[Repetitions|Repetition Detection]]
==[[Evaluation]]== 
* [[Material]] with [[Material Tables|Imbalance Adjustment]]
* [[Piece-Square Tables]]
* [[King Safety]] and [[King Safety#PawnShield|Pawn Shield]] Quality
* [[Castling Rights]]
* [[Mobility]]
* [[Center Control]]
* [[Attacks|Threats]] and [[Hanging Piece|Hanging Pieces]]
* [[Passed Pawn|Passed]], [[Isolated Pawn|Isolated]], [[Doubled Pawn|Doubled]], and [[Backward Pawn|Backward Pawns]]
* [[Trapped Pieces]]
* [[Endgame|Endgame Knowledge]]
* [[Endgame Bitbases|Bitbase]] for [[KPK]]
==Misc== 
* [[PolyGlot]] [[Opening Book|Opening Books]] <ref>[[https://github.com/michaeldv/donna_opening_books|michaeldv/donna_opening_books · GitHub]]</ref>
* [[https://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop|Interactive Read–Eval–Print Loop (REPL)]]
* Donna Chess Format position notation

=See also= 
* [[Various Classifications#ChessLegend|Chess Legends]]
* [[Various Classifications#Disaster|Disaster]]
* [[Various Classifications#GivenName|Given Name]]
* [[Various Classifications#Meteorology|Meteorology]]

=Forum Posts= 
* [[http://www.talkchess.com/forum/viewtopic.php?t=54596|Donna, a new UCI chess engine by Michael Dvorkin]] by [[Norbert Raimund Leisner]], [[CCC]], December 09, 2014
* [[http://www.talkchess.com/forum/viewtopic.php?t=56218|Donna v2.0 released]] by [[Michael Dvorkin]], [[CCC]], May 03, 2015
* [[http://www.talkchess.com/forum/viewtopic.php?t=57921|Donna 3.0 released]] by [[Michael Dvorkin]], [[CCC]], October 12, 2015
* [[http://www.talkchess.com/forum/viewtopic.php?t=58058|Donna v3.1 released]] by [[Michael Dvorkin]], [[CCC]], October 26, 2015 
* [[http://www.talkchess.com/forum/viewtopic.php?t=58849|Donna v4.0 released]] by [[Michael Dvorkin]], [[CCC]], January 08, 2016

=External Links= 
==Chess Engine== 
* [[http://donnachess.github.io/|Donna Chess Engine Downloads]]
* [[https://github.com/michaeldv/donna|michaeldv/donna · GitHub]]
* [[https://github.com/michaeldv/donna_opening_books|michaeldv/donna_opening_books · GitHub]]
* [[http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?match_length=30&print=Details&each_game=1&eng=Donna%201.0%2064-bit#Donna_1_0_64-bit|Donna 1.0 64-bit]] in [[CCRL|CCRL 40/40]]
==Misc== 
* [[https://en.wiktionary.org/wiki/Donna|Donna - Wiktionary]]
* [[https://en.wiktionary.org/wiki/donna|donna - Wiktionary]]
* [[https://en.wikipedia.org/wiki/Donna|Donna from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Donna_%28given_name%29|Donna (given name) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Belladonna|Belladonna from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Hurricane_Donna|Hurricane Donna from Wikipedia]]
* [[https://it.wikipedia.org/wiki/Donna|Donna - Wikipedia.it]] (Italian)
* [[https://en.wikipedia.org/wiki/Charlie_Parker%27s_Savoy_and_Dial_sessions#Session_6|Charlie Parker All Stars]] - [[https://en.wikipedia.org/wiki/Donna_Lee|Donna Lee]], 1947, [[https://en.wikipedia.org/wiki/YouTube|YouTube]] Video
> [[https://en.wikipedia.org/wiki/Charlie_Parker|Charlie Parker]], [[Videos#MilesDavis|Miles Davis]], [[https://en.wikipedia.org/wiki/Bud_Powell|Bud Powell]], [[https://en.wikipedia.org/wiki/Tommy_Potter|Tommy Potter]], [[https://en.wikipedia.org/wiki/Max_Roach|Max Roach]]
> [[media type="youtube" key="02apSoxB7B4" width="560" height="315"]]
* [[http://kingaglyk.pl|Kinga Głyk Trio]] - [[https://en.wikipedia.org/wiki/Donna_Lee|Donna Lee]], December 2016, [[https://en.wikipedia.org/wiki/YouTube|YouTube]] Video
> [[Videos#KingaGlyk|Kinga Głyk]], [[http://glyk.pl/|Irek Głyk]], [[http://kingaglyk.pl/|Kuba Gwardecki]]
> [[media type="youtube" key="D_onY_geaMs"]]

=References= 
<references />
=What links here?= 
[[include page="Donna" component="backlinks" limit="40"]]
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