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Created page with "'''Home * Engines * Zevra''' FILE:Zebra-stripes-black-and-white-zoo-39245.jpg|border|right|thumb| Zebra striping patterns <ref>[https://en.wikipedia.org/..."
'''[[Main Page|Home]] * [[Engines]] * Zevra'''
[[FILE:Zebra-stripes-black-and-white-zoo-39245.jpg|border|right|thumb| Zebra striping patterns <ref>[https://en.wikipedia.org/wiki/Zebra Zebra] striping patterns are unique to each individual, Closeup of stripes around a zebra's eyes, [https://commons.wikimedia.org/wiki/File:Zebra-stripes-black-and-white-zoo-39245.jpg image] by [https://pixabay.com/users/igorowitsch-762582/ igorowitsch], November 01, 2014, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Zevra''',<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Oleg Smirnov]], written in [[Cpp|C++]] and licensed under the [[Free Software Foundation#GPL|GNU General Public License]].
=Features=
==Board Representation==
* [[Bitboard Board-Definition#SixTwo|Dense Bitboard Board-Definition]]
* [[8x8 Board]]
* [[Magic Bitboards]] <ref>Zevra v2.1.2 r248 has plain like declaration (U64 rookPossibleMoves[64][4096]), but fancy like implementation with variable shift!?</ref>
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Negamax]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Late Move Reductions]]
** [[Mate Distance Pruning]]
** [[Futility Pruning]]
** [[Reverse Futility Pruning]]
** [[Multi-Cut]]
** [[Razoring]]
** [[Quiescence Search]]
* [[Move Ordering]]
** [[Hash Move]]
** [[Internal Iterative Deepening]]
** [[Killer Heuristic]]
** [[MVV-LVA|MVV/LVA]]
** [[History Heuristic]]
==[[Evaluation]]==
* [[Material]]
* [[Piece-Square Tables]]
* [[Mobility]]
* [[Pawn Structure]]
** [[Isolated Pawn]]
** [[Doubled Pawn]]
** [[Passed Pawn]]
* [[King Safety#KingTropism|King Tropism]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=65862 Tevra 1.6.2 r536] by [[Norbert Raimund Leisner]], [[CCC]], November 30, 2017
: [http://www.talkchess.com/forum/viewtopic.php?t=65862&start=33 Re: Tevra 1.6.2 r536] by [[Oleg Smirnov]], [[CCC]], March 12, 2017
=External Links=
==Chess Engine==
* [http://www.sdchess.ru/download_engines.htm SDChess - Download engines]
* [https://github.com/sovaz1997/Zevra GitHub - sovaz1997/Zevra: Chesss Programm]
* [http://www.computerchess.org.uk/ccrl/404/cgi/compare_engines.cgi?family=Zevra&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents Zevra] at [[CCRL|CCRL Blitz]]
==Misc==
* [https://en.wiktionary.org/wiki/%CE%B6%CE%AD%CE%B2%CF%81%CE%B1 ζέβρα (zévra)- Wiktionary]
* [https://en.wikipedia.org/wiki/Zebra Zebra from Wikipedia]
* [https://en.wikipedia.org/wiki/Zebra_(disambiguation) Zebra (disambiguation) from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:X86]]
[[Category:X64]]
[[Category:PC]]
[[Category:Windows]]
[[Category:Linux]]
[[Category:Mammal]]
[[FILE:Zebra-stripes-black-and-white-zoo-39245.jpg|border|right|thumb| Zebra striping patterns <ref>[https://en.wikipedia.org/wiki/Zebra Zebra] striping patterns are unique to each individual, Closeup of stripes around a zebra's eyes, [https://commons.wikimedia.org/wiki/File:Zebra-stripes-black-and-white-zoo-39245.jpg image] by [https://pixabay.com/users/igorowitsch-762582/ igorowitsch], November 01, 2014, [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref> ]]
'''Zevra''',<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Oleg Smirnov]], written in [[Cpp|C++]] and licensed under the [[Free Software Foundation#GPL|GNU General Public License]].
=Features=
==Board Representation==
* [[Bitboard Board-Definition#SixTwo|Dense Bitboard Board-Definition]]
* [[8x8 Board]]
* [[Magic Bitboards]] <ref>Zevra v2.1.2 r248 has plain like declaration (U64 rookPossibleMoves[64][4096]), but fancy like implementation with variable shift!?</ref>
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Negamax]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Late Move Reductions]]
** [[Mate Distance Pruning]]
** [[Futility Pruning]]
** [[Reverse Futility Pruning]]
** [[Multi-Cut]]
** [[Razoring]]
** [[Quiescence Search]]
* [[Move Ordering]]
** [[Hash Move]]
** [[Internal Iterative Deepening]]
** [[Killer Heuristic]]
** [[MVV-LVA|MVV/LVA]]
** [[History Heuristic]]
==[[Evaluation]]==
* [[Material]]
* [[Piece-Square Tables]]
* [[Mobility]]
* [[Pawn Structure]]
** [[Isolated Pawn]]
** [[Doubled Pawn]]
** [[Passed Pawn]]
* [[King Safety#KingTropism|King Tropism]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=65862 Tevra 1.6.2 r536] by [[Norbert Raimund Leisner]], [[CCC]], November 30, 2017
: [http://www.talkchess.com/forum/viewtopic.php?t=65862&start=33 Re: Tevra 1.6.2 r536] by [[Oleg Smirnov]], [[CCC]], March 12, 2017
=External Links=
==Chess Engine==
* [http://www.sdchess.ru/download_engines.htm SDChess - Download engines]
* [https://github.com/sovaz1997/Zevra GitHub - sovaz1997/Zevra: Chesss Programm]
* [http://www.computerchess.org.uk/ccrl/404/cgi/compare_engines.cgi?family=Zevra&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents Zevra] at [[CCRL|CCRL Blitz]]
==Misc==
* [https://en.wiktionary.org/wiki/%CE%B6%CE%AD%CE%B2%CF%81%CE%B1 ζέβρα (zévra)- Wiktionary]
* [https://en.wikipedia.org/wiki/Zebra Zebra from Wikipedia]
* [https://en.wikipedia.org/wiki/Zebra_(disambiguation) Zebra (disambiguation) from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:UCI]]
[[Category:Open Source]]
[[Category:GPL]]
[[Category:X86]]
[[Category:X64]]
[[Category:PC]]
[[Category:Windows]]
[[Category:Linux]]
[[Category:Mammal]]
