Difference between revisions of "Fizbo"

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'''Fizbo''',<br/>
 
'''Fizbo''',<br/>
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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>.   
+
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]] - in October 2019 [[#Fizbo 2|Fizbo 2]] became [[:Category:Open Source|open source]]. Fizbo was 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=
 
=Further Versions=

Revision as of 21:53, 6 October 2019

Home * Engines * Fizbo

Fizbo,
a Chess Engine Communication Protocol, and since version 1.5, UCI compliant [1] chess engine by Youri Matiounine - in October 2019 Fizbo 2 became open source. Fizbo was first released in May 2014 [2], apparently bitboard based, requiring x86-64 bitscan forward [3] and taking advantage from population count instruction. Since version 1.2, Fizbo performs a parallel search based on a version of enhanced PV splitting algorithm, only one split-point is active at a time, along with iterative deepening, since 1.3 with aspiration windows. Syzygy Bases with up to five pieces were used since version 1.4 released in May 2015. The transposition table with dense 8 byte entries is used also in quiescence search [4].

Further Versions

Fizbo 1.7

Fizbo 1.7, released in March 2016, improved in evaluation due to changed and new features, including pawn pattern, considering all possible combinations of two pawns of the same color [5], and further supports 6-piece Syzygy Bases.

Fizbo 1.8

Fizbo 1.8 in August 2016 came with a BMI2 executable, improved pondering logic, reworked parallel search logic, and multiple small changes to search and evaluation [6].

Fizbo 1.9

Fizbo 1.9, released on December 31, 2016, further enhanced considerably due to extensive changes and new features in evaluation [7].

Fizbo 2

Fizbo 2 was released in December 21, 2017 [8], and is apparently the last version by Youri Matiounine, who stopped working on the engine, and decided to release his source code on GitHub [9] [10] nearly two years later, including a two-layer neural network based evaluation with optional AVX2 intrinsics [11].

Forum Posts

2014

2015

2016

2017 ...

External Links

Chess Engine

Misc

References

  1. ↑ Fizbo version 1.5 released by Youri Matiounine, CCRL Discussion Board, August 16, 2015
  2. ↑ new engine - Fizbo - could you please test it? by Youri Matiounine, CCRL Discussion Board, May 07, 2014
  3. ↑ new engine - Fizbo - could you please test it? by Youri Matiounine, CCRL Discussion Board, May 07, 2014
  4. ↑ Fizbo Chess Engine
  5. ↑ Re: Fizbo 1.7 is released by Youri Matiounine, CCC, March 23, 2016
  6. ↑ Fizbo 1.8 released by Youri Matiounine, CCC, August 26, 2016
  7. ↑ Fizbo 1.9 released by Youri Matiounine, CCC, December 31, 2016
  8. ↑ Fizbo 2 has been released by Youri Matiounine, CCC, December 21, 2017
  9. ↑ Fizbo 2 sources just got released by Damir, CCC, October 06, 2019
  10. ↑ GitHub - MoonstoneLight/Fizbo-Chess: Original codes of Fizbo Chess. Thanks to original author Youri Matiounine
  11. ↑ Fizbo-Chess/nn2.cpp at master · MoonstoneLight/Fizbo-Chess · GitHub

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