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'''RubiChess''',<br/>
an [[UCI]] compliant [[:Category:Open Source|open source chess engine]] by [[Andreas Matthies]], written in [[Cpp|C++]], licensed under the [[Free Software Foundation#GPL|GPL v3.0]].
RubiChess started in 2017 as [[0x88]] engine and soon evolved to a [[Bitboards|bitboard]] engine first using [[Rotated Bitboards|rotated bitboards]] and subsequently [[Magic Bitboards|magic bitboards]] (about 24% faster) to determine [[Sliding Piece Attacks|sliding piece attacks]] <ref>[https://github.com/Matthies/RubiChess/blob/master/ChangeLog.txt RubiChess/ChangeLog.txt at master · Matthies/RubiChess · GitHub]</ref>. In September 2020, Andreas Matthies announced RubiChess [[NNUE]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=2&t=75016 RubiChess NNUE player implemented] by [[Andreas Matthies]], [[CCC]], September 06, 2020</ref>.
=Features=
** [[History Heuristic#CMHist|Counter Moves History]]
==[[Evaluation]]==
* [[NNUE]] (RubiChess NNUE)
* [[Texel's Tuning Method]]
* [[Tapered Eval]]
=Forum Posts=
==2018 ...==
* [http://talkchess.com/forum3/viewtopic.php?f=2&t=67594 RubiChess 0.9 is out] by [[Andreas Matthies]], [[CCC]], May 29, 2018
* [http://talkchess.com/forum3/viewtopic.php?t=68559 RubiChess 1.1] by [[Andreas Matthies]], [[CCC]], October 03, 2018
* [http://talkchess.com/forum3/viewtopic.php?f=2&t=70878 Rubichess 1.4] by [[Ferdinand Mosca]], [[CCC]], May 31, 2019
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69754&start=369 Re: New engine releases 2019] by [[Andreas Matthies]], [[CCC]], October 17, 2019
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=75016 RubiChess NNUE player implemented] by [[Andreas Matthies]], [[CCC]], September 06, 2020
=External Links=
[[Category:PC]]
[[Category:X64]]
[[Category:Linux]]
[[Category:Windows]]
[[Category:X64]]
[[Category:NNUE]]
[[Category:Chess Suffix]]
[[Category:Geography]]
[[Category:Given Name]]
