Fizbo

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**Fizbo**,
a [[Chess Engine Communication Protocol]], and since version 1.5, [[UCI]] compliant <ref>[[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=8241|Fizbo version 1.5 released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], August 16, 2015</ref> chess engine by [[Youri Matiounine]], first released in May 2014 <ref>[[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=7523|new engine - Fizbo - could you please test it?]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], May 07, 2014</ref>, apparently [[Bitboards|bitboard]] based, requiring [[x86-64]] [[BitScan#bsfbsr|bitscan forward]] <ref>[[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=7523|new engine - Fizbo - could you please test it?]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], May 07, 2014</ref> and taking advantage from [[Population Count|population count]] [[x86-64#gpinstructions|instruction]]. Since version **1.2**, Fizbo performs a [[Parallel Search|parallel search]] based on a version of enhanced [[Parallel Search#PrincipalVariationSplitting|PV splitting algorithm]], only one split-point is active at a time, along with [[Iterative Deepening|iterative deepening]], since **1.3** with [[Aspiration Windows|aspiration windows]]. [[Syzygy Bases]] with up to five pieces were used since version **1.4** released in May 2015. The [[Transposition Table|transposition table]] with dense 8 byte entries is used also in [[Quiescence Search|quiescence search]] <ref>[[https://sites.google.com/site/fizbochessengine/|Fizbo Chess Engine]]</ref>.  

=Further Versions=
==Fizbo 1.7==
Fizbo **1.7**, released in March 2016, improved in [[Evaluation|evaluation]] due to changed and new features, including [[Pawn Pattern and Properties|pawn pattern]], considering all possible combinations of two pawns of the same color <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=59608&start=3|Re: Fizbo 1.7 is released]] by [[Youri Matiounine]], [[CCC]], March 23, 2016</ref>, and further supports 6-piece [[Syzygy Bases]]. 

==Fizbo 1.8==
Fizbo **1.8** in August 2016 came with a [[BMI2]] executable, improved [[Pondering|pondering]] logic, reworked parallel search logic, and multiple small changes to [[Search|search]] and [[Evaluation|evaluation]] <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=61243|Fizbo 1.8 released]] by [[Youri Matiounine]], [[CCC]], August 26, 2016</ref>. 

==Fizbo 1.9==
Fizbo **1.9**, released  on December 31, 2016, further enhanced considerably due to extensive changes and new features in [[Evaluation|evaluation]]  <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=62677|Fizbo 1.9 released]] by [[Youri Matiounine]], [[CCC]], December 31, 2016</ref>. 

=Forum Posts=
==2014==
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=7523|new engine - Fizbo - could you please test it?]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], May 07, 2014
* [[http://www.talkchess.com/forum/viewtopic.php?t=52270|Fizbo 1.1]] by [[Graham Banks]], [[CCC]], May 09, 2014
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=7668|new version of Fizbo engine released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], July 28, 2014
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=7826|Fizbo version 1.3 is released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], November 11, 2014
* [[http://www.talkchess.com/forum/viewtopic.php?t=54318|Fizbo 1.3 released]] by [[Graham Banks]], [[CCC]], November 12, 2014
==2015==
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=8113|Fizbo version 1.4 released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], May 18, 2015
* [[http://www.talkchess.com/forum/viewtopic.php?t=56408|Fizbo 1.4 released]] by [[Graham Banks]], [[CCC]], May 18, 2015
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=8241|Fizbo version 1.5 released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], August 16, 2015
* [[http://www.talkchess.com/forum/viewtopic.php?t=57288|Fizbo version 1.5 released]] by [[Graham Banks]], [[CCC]], August 16, 2015
==2016==
* [[http://kirill-kryukov.com/chess/discussion-board/viewtopic.php?f=7&t=8460|Fizbo version 1.6 released]] by [[Youri Matiounine]], [[Computer Chess Forums|CCRL Discussion Board]], January 29, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=59101|Fizbo 1.6 released]] by [[Graham Banks]], [[CCC]], January 29, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=59608|Fizbo 1.7 is released]] by [[Youri Matiounine]], [[CCC]], March 23, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=61243|Fizbo 1.8 released]] by [[Youri Matiounine]], [[CCC]], August 26, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=62677|Fizbo 1.9 released]] by [[Youri Matiounine]], [[CCC]], December 31, 2016
==2017==
* [[http://www.talkchess.com/forum/viewtopic.php?t=66090|Fizbo 2 has been released]] by [[Youri Matiounine]], [[CCC]], December 21, 2017

=External Links=
==Chess Engine==
* [[https://sites.google.com/site/fizbochessengine/|Fizbo Chess Engine]]
* [[http://www.computerchess.org.uk/ccrl/404/cgi/compare_engines.cgi?family=Fizbo&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|Fizbo]] in [[CCRL|CCRL 40/4]]
* [[http://www.computerchess.org.uk/ccrl/4040/cgi/compare_engines.cgi?family=Fizbo&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|Fizbo]] in [[CCRL|CCRL 40/40]]
==Misc==
* [[https://en.wiktionary.org/wiki/fizbo|fizbo - Wiktionary]]
* [[https://en.wikipedia.org/wiki/Fizbo|Fizbo from Wikipedia]]

=References= 
<references />
=What links here?= 
[[include page="Fizbo" component="backlinks" limit="40"]]
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