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'''[[Main Page|Home]] * [[Engines]] * JikChess'''
'''JikChess''',<br/>
a [[Chess Engine Communication Protocol]] compliant chess engine by [[Janne I. Kokkala]], written in [[Cpp|C++11]]. Its development started in early 2013, and the first version was released in November 2014 <ref>[http://koti.kapsi.fi/jik/jikchess/#history JikChess - History]</ref>.
=Features=
<ref>based on [http://koti.kapsi.fi/jik/jikchess/#technical JikChess - Technical]</ref>
==Search==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Alpha-Beta]] [[Principal Variation Search|PVS]]
* [[Selectivity]]
** [[Null Move Pruning]]
** [[Late Move Reductions]]
** [[Futility Pruning#Extendedfutilitypruning|Extended Futility Pruning]]
** [[Quiescence Search]] with [[Captures]] and [[Promotions]] only
** [[Check Extensions]]
** [[Extensions#FractionalExtensions|Fractional Ply]] [[PV Extensions]]
* [[Move Ordering]]
** [[Transposition Table]]
** [[Captures]] by [[Static Exchange Evaluation|SEE]]
** [[Killer Heuristic]]
** [[Internal Iterative Deepening]]
==Evaluation==
* [[Evaluation#Linear|Linear Combination]] of Numerical Positional Features
* [[Tapered Eval]]
* [[Pawn Hash Table]]
* [[Automated Tuning]]
** [[Automated Tuning#LogisticRegression|Logistic Regression]] (Similar to [[Texel's Tuning Method]])
** [https://en.wikipedia.org/wiki/Regularization_%28mathematics%29 Regularization] - [https://en.wikipedia.org/wiki/Prior_probability Prior] added to the [https://en.wikipedia.org/wiki/Loss_function Cost Function] (encourages unimportant parameters to become zero)
==Misc==
* [[PolyGlot]] [[Opening Book]]
* [[Gaviota Tablebases]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=54598 JikChess 0.01 by Janne I. Kokkala] by Ruxy Sylwyka, [[CCC]], December 09, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=58016 JikChess 0.02 released] by [[Graham Banks]], [[CCC]], October 22, 2015
=External Links=
* [http://koti.kapsi.fi/jik/jikchess/ JikChess chess engine]
* [http://ccrl.chessdom.com/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=JikChess%200.02%2064-bit JikChess 0.02 64-bit] in [[CCRL|CCRL 40/40]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:WinBoard]]
[[Category:XBoard]]
[[Category:Chess Suffix]]
'''JikChess''',<br/>
a [[Chess Engine Communication Protocol]] compliant chess engine by [[Janne I. Kokkala]], written in [[Cpp|C++11]]. Its development started in early 2013, and the first version was released in November 2014 <ref>[http://koti.kapsi.fi/jik/jikchess/#history JikChess - History]</ref>.
=Features=
<ref>based on [http://koti.kapsi.fi/jik/jikchess/#technical JikChess - Technical]</ref>
==Search==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Alpha-Beta]] [[Principal Variation Search|PVS]]
* [[Selectivity]]
** [[Null Move Pruning]]
** [[Late Move Reductions]]
** [[Futility Pruning#Extendedfutilitypruning|Extended Futility Pruning]]
** [[Quiescence Search]] with [[Captures]] and [[Promotions]] only
** [[Check Extensions]]
** [[Extensions#FractionalExtensions|Fractional Ply]] [[PV Extensions]]
* [[Move Ordering]]
** [[Transposition Table]]
** [[Captures]] by [[Static Exchange Evaluation|SEE]]
** [[Killer Heuristic]]
** [[Internal Iterative Deepening]]
==Evaluation==
* [[Evaluation#Linear|Linear Combination]] of Numerical Positional Features
* [[Tapered Eval]]
* [[Pawn Hash Table]]
* [[Automated Tuning]]
** [[Automated Tuning#LogisticRegression|Logistic Regression]] (Similar to [[Texel's Tuning Method]])
** [https://en.wikipedia.org/wiki/Regularization_%28mathematics%29 Regularization] - [https://en.wikipedia.org/wiki/Prior_probability Prior] added to the [https://en.wikipedia.org/wiki/Loss_function Cost Function] (encourages unimportant parameters to become zero)
==Misc==
* [[PolyGlot]] [[Opening Book]]
* [[Gaviota Tablebases]]
=Forum Posts=
* [http://www.talkchess.com/forum/viewtopic.php?t=54598 JikChess 0.01 by Janne I. Kokkala] by Ruxy Sylwyka, [[CCC]], December 09, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=58016 JikChess 0.02 released] by [[Graham Banks]], [[CCC]], October 22, 2015
=External Links=
* [http://koti.kapsi.fi/jik/jikchess/ JikChess chess engine]
* [http://ccrl.chessdom.com/ccrl/4040/cgi/engine_details.cgi?print=Details&each_game=1&eng=JikChess%200.02%2064-bit JikChess 0.02 64-bit] in [[CCRL|CCRL 40/40]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:WinBoard]]
[[Category:XBoard]]
[[Category:Chess Suffix]]
