Diablo

**[[Home]] * [[Engines]] * Diablo**
|| [[image:Cojuelo03.JPG link="https://commons.wikimedia.org/wiki/File:Cojuelo03.JPG"]] ||~ || **Diablo**,
an [[UCI]] compliant [[Open Source Engines|open source chess engine]] by [[Marcus Prewarski]], written in [[C]], distributed under the [[Free Software Foundation#GPL|GNU General Public License]], first released in 2005, latest version Diablo 0.5.1 released in October 2006, with [[Jim Ablett]] compiles available <ref>[[http://kirill-kryukov.com/chess/kcec/cgi/engine_details.cgi?print=Details&each_game=1&eng=Diablo%200.5.1%20JA|Diablo 0.5.1 JA]] in [[KCEC]]</ref>. ||
|| [[https://en.wikipedia.org/wiki/Dominican_Carnival_%28Dominican_Republic%29#Characters|Diablo Cojuelo]] <ref>[[https://commons.wikimedia.org/wiki/File:Cojuelo03.JPG|Diablo Cojuelo]] by DRW2193, February 01, 2011, [[https://en.wikipedia.org/wiki/Culture_of_the_Dominican_Republic#Festivals|Culture of the Dominican Republic - Festivals - Wikipedia]], [[http://commons.wikimedia.org/wiki/Category:Diablo_Cojuelo|Category: Diablo Cojuelo]], [[https://es.wikipedia.org/wiki/Diablo_Cojuelo|Diablo Cojuelo from Wikipedia.es]], [[https://en.wikipedia.org/wiki/Wikimedia_Commons|Wikimedia Commons]]</ref> ||~ ||^ ||
[[toc]]
=Description=
==Board Representation==
Diablo is a [[0x88]] engine with [[Piece-Lists|piece-lists]] to determe [[Vector Attacks|vector attacks]] by 0x88 square difference. It performs [[Move Generation#PseudoLegal|pseudo-legal move generation]] and keeps an [[Attack and Defend Maps|attack table]] per [[Ply|ply]] - initialized once per [[Node|node]] during [[Evaluation|evaluation]], which later speeds up [[Check|in check]] detection and [[Static Exchange Evaluation|static exchange evaluation]] by [[Attack and Defend Maps#EDsLookup|lookup]].

==Search==
The [[Search|search]] is [[Principal Variation Search|PVS]] [[Alpha-Beta|alpha-beta]] inside the [[Depth#FractionalPlies|fractional ply]] [[Iterative Deepening|iterative deepening]] framework without [[Aspiration Windows|aspiration]]. The [[Transposition Table#ReplacementStrategies|depth-preferred]] [[Transposition Table|transposition table]]  based on [[Zobrist Hashing|Zobrist hashing]] is used in the main search only. Beside [[Quiescence Search|quiescence]], [[Selectivity|selectivity]] is due to [[Futility Pruning|futility pruning]] near the tips, [[Null Move Pruning|null move pruning]] combined with [[Mate Threat Extensions|mate threat extensions]], and further [[Extensions#FractionalExtensions|fractional extensions]] for [[One Reply Extensions|single replies]], [[Check Extensions|check]], [[Passed Pawn Extensions|passed pawn to 7th rank]] and [[Promotions|queening]]. [[Move Ordering|Move ordering]] takes [[PV-Move|PV-move]], [[MVV-LVA|MVV/LVA]] plus fast SEE for [[Captures|captures]], two [[Killer Move|killers]] and the [[History Heuristic|history heuristic]] into account. [[Internal Iterative Deepening|Internal iterative deepening]] is applied in case of [[Node Types#PV|PV-nodes]] if no move was found in the transposition table.

==Evaluation==
[[Evaluation]] considers [[Material|material]] with [[Piece-Square Tables|piece-square tables]], [[Bishop Pair|bishop pair]], [[Development|development]], [[Center Control|center control]], [[Mobility|mobility]] of bishops and rooks, in particular considering [[Trapped Pieces|trapped rooks]], [[Rook on Open File|rook on open file]] and [[Rook On Seventh|on 7th rank]]. [[Pawn Structure|Pawn structure]] evaluation focuses on [[Passed Pawn|passed pawns]] and further punishes [[Backward Pawn|backward]] and [[Doubled Pawn|doubled pawns]]. [[King Safety|King safety]] terms pay attention to an exposed king and [[King Safety#PawnShield|pawn shield]]. Appropriate [[Score|scores]] are aggregated in [[Opening|opening]] and [[Endgame|endgame]] accumulators and finally, if the sum of material is below some late endgame threshold, [[Tapered Eval|tapered]] by the current [[Game Phases|game phase]] aka sum of material.

=See also=
* [[Chinese Dark Chess|Chinese Dark Chess program Diablo]] 
* [[Various Classifications#Demonology|Demonology]]
* [[DrunkenMaster]]
* [[Various Classifications#Geography|Geography]]
* [[Novag Diablo]]
* [[Satana]]

=Forum Posts=
* [[http://www.stmintz.com/ccc/index.php?id=417516|Re: Gauntlets Chispa 4.0.3 Queen 3.02 and Diablo 0.1 - games]] by [[Marcus Prewarski]], [[CCC]], March 13, 2005
* [[http://www.talkchess.com/forum/viewtopic.php?t=34138|Diablo 0.5.1 x64 version?]] by [[Harun Taner]], [[CCC]], May 04, 2010

=External Links=
==Chess Engine==
* [[http://www.geocities.ws/prewarski/|Drunken Master Chess Engine - Diablo]]
* [[http://kirr.homeunix.org/chess/engines/Jim%20Ablett/DIABLO/|Index of /chess/engines/Jim Ablett/DIABLO]] compiled by [[Jim Ablett]], hosted by [[Kirill Kryukov]]
* [[http://wbec-ridderkerk.nl/html/details1/Diablo.html|Diablo]] at [[WBEC|WBEC Ridderkerk]]
* [[http://kirill-kryukov.com/chess/kcec/cgi/engine_details.cgi?print=Details&each_game=1&eng=Diablo%200.5.1%20JA|Diablo 0.5.1 JA]] in [[KCEC]]
* [[http://www.computerchess.org.uk/ccrl/4040/cgi/engine_details.cgi?print=Details&eng=Diablo%200.5.1|Diablo 0.5.1]] in [[CCRL|CCRL 40/40]]
==Misc==
* [[https://en.wiktionary.org/wiki/diablo|diablo - Wiktionary]]
* [[https://en.wikipedia.org/wiki/Diablo|Diablo from Wikipedia]]
* [[https://es.wikipedia.org/wiki/Diablo|Diablo from Wikipedia.es]] (Spanish)
* [[https://es.wikipedia.org/wiki/Diablo_Cojuelo|Diablo Cojuelo from Wikipedia.es]] (Spanish)
* [[https://en.wikipedia.org/wiki/El_Diablo|El Diablo from Wikipedia]]
===Chess Computers===
* [[http://www.chesscomputeruk.com/html/novag_diablo.html|Novag Diablo]] from [[http://www.chesscomputeruk.com/index.html|Chess Computer UK]] by [[Mike Watters]]
===Games===
* [[https://en.wikipedia.org/wiki/Diablo_%28series%29|Diablo (series) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Diablo_%28video_game%29|Diablo (video game) from Wikipedia]]
===Geography===
* [[https://en.wikipedia.org/wiki/Canyon_Diablo_%28canyon%29|Canyon Diablo (canyon) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Canyon_Diablo,_Arizona|Canyon Diablo, Arizona from Wikipedia]]
* [[http://en.wikipedia.org/wiki/Canyon_Diablo_%28meteorite%29|Canyon Diablo (meteorite) from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Diablo_Lake|Diablo Lake from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Diablo_Range|Diablo Range from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Mount_Diablo|Mount Diablo from Wikipedia]]
* [[http://es.wikipedia.org/wiki/Puerta_del_Diablo|Puerta del Diablo from Wikipedia.es]]
===Diabolo===
* [[https://en.wikipedia.org/wiki/Diabolo|Diabolo from Wikipedia]]
* [[https://en.wikipedia.org/wiki/Diabolo_%28disambiguation%29|Diabolo (disambiguation) from Wikipedia]]
===Music Video===
* [[http://mariofloreslatinmusic.com/aboutus.html|Mario Flores Latin Jazz Band]] - Mambo Diablo, [[http://en.wikipedia.org/wiki/YouTube|YouTube]] Video
> [[media type="youtube" key="xhhDr2Rh9JQ" width="480"]]

=References= 
<references />
=What links here?= 
[[include page="Diablo" component="backlinks" limit="20"]]
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