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'''Aleks Peshkov''',<br/>
a Russian software developer and computer chess programmer. Aleks contributed to various methods of generating [[Sliding Piece Attacks|sliding piece attacks]] in [[Bitboards|bitboards]], most notably he pioneered in the [[Hyperbola Quintessence]] approach <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=140314 Re: BitBoard Tests Magic v Non-Rotated 32 Bits v 64 Bits] by [[Aleks Peshkov]], [[CCC]], August 25, 2007</ref> regarding the [[General Setwise Operations#Union|union]] of [[On an empty Board#PositiveRays|positive]] and [[On an empty Board#NegativeRays|negative ray-attacks]], further utilizing disjoint ray-attacks in conjunction with own inverse and [[Flipping Mirroring and Rotating|mirroring or flipping]] distributive [[General Setwise Operations#ExclusiveOr|xor]] instruction, also suggesting [[SSSE3#Peshkov|SSSE3 Hyperbola Quintessence]] using the [[SSSE3#Pshufb|Pshufb]] instruction for the [[Flipping Mirroring and Rotating#FlipVertically|vertical flip]].
Aleks also supported the [[Stockfish]] development in making test resources available <ref>[httpshttp://web.archive.org/web/20151128030323/http://blog.stockfishchess.org/post/6064085404/stockfish-19 Stockfish Blog - Stockfish 1.9], October 2, 2010([https://en.wikipedia.org/wiki/Wayback_Machine Wayback Machine])</ref>.
=See also=
=Forum Posts=
==2007 ...==* [http://www.talkchess.com/forumforum3/viewtopic.php?topic_viewf=threads7&pt=140314 15172 standard chess piece set] by [[Aleks Peshkov]], [[CCC]], July 17, 2007* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=16002&start=25 Re: BitBoard Tests Magic v Non-Rotated 32 Bits v 64 Bits] by [[Aleks Peshkov]], [[CCC]], August 25, 2007 » [[Hyperbola Quintessence]]* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=16724 Tuning PVS] by [[Aleks Peshkov]], [[CCC]], September 27, 2007 » [[Principal Variation Search]]* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=17553 de Bruijn numbers and Zobrist keys] by [[Aleks Peshkov]], [[CCC]], November 02, 2007==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=41104 Null move alterative in endgames] by [[Aleks Peshkov]], [[CCC]], November 16, 2011 » [[Null Move Pruning]], [[Null Move Reductions]]
* [http://www.talkchess.com/forum/viewtopic.php?t=55501 (iteration+depth) TT replacement policy] by [[Aleks Peshkov]], [[CCC]], February 27, 2015 » [[Transposition Table]]
* [http://www.talkchess.com/forum/viewtopic.php?t=58667&start=106 Re: The wrong way] by [[Aleks Peshkov]], [[CCC]], January 05, 2016 » [[Hyperbola Quintessence]]
* [http://www.talkchess.com/forum/viewtopic.php?t=58890&start=13 Re: On-the fly hash key generation?] by [[Aleks Peshkov]], [[CCC]], January 13, 2016 » [[Zobrist Hashing]]
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=77380 Qsearch dynamic order besides MVV/LVA] by [[Aleks Peshkov]], [[CCC]], May 25, 2021 » [[Move Ordering]], [[Quiescence Search]]
=References=
'''[[People|Up one Level]]'''
[[Category:Chess Programmer|Peshkov]]
[[Category:Stockfish Contributor|Peshkov]]
