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Created page with "'''Home * Engines * Ifrit''' FILE:Brooklyn Museum - Arghan Div Brings the Chest of Armor to Hamza.jpg|border|right|thumb| An Ifrit named Arghan Div <ref>"..."
'''[[Main Page|Home]] * [[Engines]] * Ifrit'''
[[FILE:Brooklyn Museum - Arghan Div Brings the Chest of Armor to Hamza.jpg|border|right|thumb| An Ifrit named Arghan Div <ref>"An Ifrit named Arghan [https://en.wikipedia.org/wiki/Daeva Div] brings the chest of armor to [https://en.wikipedia.org/wiki/Hamzanama Hamza]", unknown artist, between 1562 and 1577, [https://en.wikipedia.org/wiki/Brooklyn_Museum Brooklyn Museum], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], [https://en.wikipedia.org/wiki/Ifrit Ifrit from Wikipedia]</ref>
]]
'''Ifrit''', (Ифрит)<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Andrey Brenkman]], written in [[Cpp|C++]], distributed under the [[Free Software Foundation#GPL|GNU General Public License]], with executables built to run under [[Windows]], [[Linux]], and [[Android]], 64, and 32 bit.
The development started in 2006, as suggested by the copyright notice inside the source files, the most recent version m1.8 published on [https://en.wikipedia.org/wiki/Bitbucket Bitbucket] on June 14, 2012. Ifrit used several [[Board Representation|board representations]] and implementations in four series, namely [[0x88]] in series "c" , [[Bitboards]] in "b", object oriented Bitboards in series "j", and finally, [[Magic Bitboards]] in series "m". The [[Search|search]] does not perform [[Negamax]], but indirect [[Recursion|recursion]] with White as max-player and Black as min-player. Some routines, such as [[BitScan|bitscan]], are instantiated in multiple source files, bitboard constants are defined as decimals rather than more intuitive [https://en.wikipedia.org/wiki/Hexadecimal hexadecimal] for board pattern.
=Features=
<ref>Based on Ifrit_m1_9_Beta_24_June_2012, [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/default/ abrenkman / Ifrit_chess_engine / source / — Bitbucket]</ref>
==[[Move Generation]]==
* [[Magic Bitboards#Plain|Plain Magic Bitboards]]
* [[BitScan#DeBruijnMultiplation|BitScan Forward by De Bruijn Multiplication]] <ref>[[BitScan#DeBruijnMultiplation|Bitscan forward by De Bruijn Multiplication]] with De Bruijn constant from CPW, 0x03F79D71B4CB0A89, used as decimal magic 285870213051386505, implementation (decimal conversion?) credited to [[Jim Ablett]], routine by [[Charles Leiserson]], [[Harald Prokop]] and [[Keith H. Randall]], end of [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/159ff9cab144e4fb6d63f208550566b3d2ed4f81/move_generation.cpp?fileviewer=file-view-default abrenkman / Ifrit_chess_engine / source / move_generation.cpp — Bitbucket], also instantiated elsewhere</ref>
* [[BitScan#DoubleConversionBSR|BitScan Reverse by Double Conversion]]
* [[Population Count#SWARPopcount|SWAR-Popcount]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Zobrist Hashing]]
* [[Move Ordering]]
** [[History Heuristic]]
** [[Killer Heuristic]]
** [[MVV-LVA|MVV/LVA]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Null Move Pruning]]
** [[Late Move Reductions]]
** [[Futility Pruning]]
** [[Razoring]]
** [[Quiescence Search]]
** [[Delta Pruning]]
==[[Evaluation]]==
* [[Material]]
* [[Piece-Square Tables]]
* [[Pawn Structure]]
* [[Evaluation of Pieces]]
* [[King Safety]]
** [[King Safety#PawnShield|Pawn Shield]]
** [[King Safety#SquareControl|Square Control]]
=See also=
* [[Djinn]]
* [[Genie]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=18427 Ifrid??] by Tony Thomas, [[CCC]], December 17, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=18525 Ifrit] by [[Gabor Szots]], [[CCC]], December 24, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=32163 Ifrit Updated] by [[Swaminathan Natarajan]], January 29, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=35800 [STS 1-10] Ifrit 3.6] by [[Swaminathan Natarajan]], August 14, 2010
=External Links=
==Chess Engine==
* [http://alphagameset.xyz/ifrit/ifrit_chess_engine.html Шахматная программа Ифрит (Ifrit chess engine)]
* [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/default/ abrenkman / Ifrit_chess_engine / source / — Bitbucket]
* [http://kirr.homeunix.org/chess/engines/Jim%20Ablett/IFRIT/ Index of /chess/engines/Jim Ablett/IFRIT] by [[Jim Ablett]] hosted by [[Kirill Kryukov]]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Ifrit&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 Ifrit] at [[CCRL|CCRL 40/40]]
==Misc==
* [https://en.wikipedia.org/wiki/Ifrit Ifrit from Wikipedia]
: [https://ru.wikipedia.org/wiki/%D0%98%D1%84%D1%80%D0%B8%D1%82 Ифрит — Википедия]
* [https://en.wikipedia.org/wiki/Melechesh Melechesh] - A Summoning of Ifrit and Genii, [https://en.wikipedia.org/wiki/Djinn_(album) Djinn] (2001), [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=4bV-LpGuquc|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:GPL]]
[[Category:UCI]]
[[Category:Mac]]
[[Category:Android]]
[[Category:Demonology]]
[[Category:Metaphysics]]
[[Category:Mythology]]
[[Category:Music]]
[[FILE:Brooklyn Museum - Arghan Div Brings the Chest of Armor to Hamza.jpg|border|right|thumb| An Ifrit named Arghan Div <ref>"An Ifrit named Arghan [https://en.wikipedia.org/wiki/Daeva Div] brings the chest of armor to [https://en.wikipedia.org/wiki/Hamzanama Hamza]", unknown artist, between 1562 and 1577, [https://en.wikipedia.org/wiki/Brooklyn_Museum Brooklyn Museum], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons], [https://en.wikipedia.org/wiki/Ifrit Ifrit from Wikipedia]</ref>
]]
'''Ifrit''', (Ифрит)<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Andrey Brenkman]], written in [[Cpp|C++]], distributed under the [[Free Software Foundation#GPL|GNU General Public License]], with executables built to run under [[Windows]], [[Linux]], and [[Android]], 64, and 32 bit.
The development started in 2006, as suggested by the copyright notice inside the source files, the most recent version m1.8 published on [https://en.wikipedia.org/wiki/Bitbucket Bitbucket] on June 14, 2012. Ifrit used several [[Board Representation|board representations]] and implementations in four series, namely [[0x88]] in series "c" , [[Bitboards]] in "b", object oriented Bitboards in series "j", and finally, [[Magic Bitboards]] in series "m". The [[Search|search]] does not perform [[Negamax]], but indirect [[Recursion|recursion]] with White as max-player and Black as min-player. Some routines, such as [[BitScan|bitscan]], are instantiated in multiple source files, bitboard constants are defined as decimals rather than more intuitive [https://en.wikipedia.org/wiki/Hexadecimal hexadecimal] for board pattern.
=Features=
<ref>Based on Ifrit_m1_9_Beta_24_June_2012, [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/default/ abrenkman / Ifrit_chess_engine / source / — Bitbucket]</ref>
==[[Move Generation]]==
* [[Magic Bitboards#Plain|Plain Magic Bitboards]]
* [[BitScan#DeBruijnMultiplation|BitScan Forward by De Bruijn Multiplication]] <ref>[[BitScan#DeBruijnMultiplation|Bitscan forward by De Bruijn Multiplication]] with De Bruijn constant from CPW, 0x03F79D71B4CB0A89, used as decimal magic 285870213051386505, implementation (decimal conversion?) credited to [[Jim Ablett]], routine by [[Charles Leiserson]], [[Harald Prokop]] and [[Keith H. Randall]], end of [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/159ff9cab144e4fb6d63f208550566b3d2ed4f81/move_generation.cpp?fileviewer=file-view-default abrenkman / Ifrit_chess_engine / source / move_generation.cpp — Bitbucket], also instantiated elsewhere</ref>
* [[BitScan#DoubleConversionBSR|BitScan Reverse by Double Conversion]]
* [[Population Count#SWARPopcount|SWAR-Popcount]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Zobrist Hashing]]
* [[Move Ordering]]
** [[History Heuristic]]
** [[Killer Heuristic]]
** [[MVV-LVA|MVV/LVA]]
* [[Selectivity]]
** [[Check Extensions]]
** [[Null Move Pruning]]
** [[Late Move Reductions]]
** [[Futility Pruning]]
** [[Razoring]]
** [[Quiescence Search]]
** [[Delta Pruning]]
==[[Evaluation]]==
* [[Material]]
* [[Piece-Square Tables]]
* [[Pawn Structure]]
* [[Evaluation of Pieces]]
* [[King Safety]]
** [[King Safety#PawnShield|Pawn Shield]]
** [[King Safety#SquareControl|Square Control]]
=See also=
* [[Djinn]]
* [[Genie]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=18427 Ifrid??] by Tony Thomas, [[CCC]], December 17, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=18525 Ifrit] by [[Gabor Szots]], [[CCC]], December 24, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=32163 Ifrit Updated] by [[Swaminathan Natarajan]], January 29, 2010
* [http://www.talkchess.com/forum/viewtopic.php?t=35800 [STS 1-10] Ifrit 3.6] by [[Swaminathan Natarajan]], August 14, 2010
=External Links=
==Chess Engine==
* [http://alphagameset.xyz/ifrit/ifrit_chess_engine.html Шахматная программа Ифрит (Ifrit chess engine)]
* [https://bitbucket.org/abrenkman/ifrit_chess_engine/src/default/ abrenkman / Ifrit_chess_engine / source / — Bitbucket]
* [http://kirr.homeunix.org/chess/engines/Jim%20Ablett/IFRIT/ Index of /chess/engines/Jim Ablett/IFRIT] by [[Jim Ablett]] hosted by [[Kirill Kryukov]]
* [http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Ifrit&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 Ifrit] at [[CCRL|CCRL 40/40]]
==Misc==
* [https://en.wikipedia.org/wiki/Ifrit Ifrit from Wikipedia]
: [https://ru.wikipedia.org/wiki/%D0%98%D1%84%D1%80%D0%B8%D1%82 Ифрит — Википедия]
* [https://en.wikipedia.org/wiki/Melechesh Melechesh] - A Summoning of Ifrit and Genii, [https://en.wikipedia.org/wiki/Djinn_(album) Djinn] (2001), [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: {{#evu:https://www.youtube.com/watch?v=4bV-LpGuquc|alignment=left|valignment=top}}
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:GPL]]
[[Category:UCI]]
[[Category:Mac]]
[[Category:Android]]
[[Category:Demonology]]
[[Category:Metaphysics]]
[[Category:Mythology]]
[[Category:Music]]
