Fizbo

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a Chess Engine Communication Protocol, and since version 1.5, UCI compliant chess engine by Youri Matiounine, first released in May 2014, apparently bitboard based, requiring x86-64 bitscan forward 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.
 * Fizbo**,

=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, 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.

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

=Forum Posts=

2014

 * [|new engine - Fizbo - could you please test it?] by Youri Matiounine, CCRL Discussion Board, May 07, 2014
 * [|Fizbo 1.1] by Graham Banks, CCC, May 09, 2014
 * [|new version of Fizbo engine released] by Youri Matiounine, CCRL Discussion Board, July 28, 2014
 * [|Fizbo version 1.3 is released] by Youri Matiounine, CCRL Discussion Board, November 11, 2014
 * [|Fizbo 1.3 released] by Graham Banks, CCC, November 12, 2014

2015

 * [|Fizbo version 1.4 released] by Youri Matiounine, CCRL Discussion Board, May 18, 2015
 * [|Fizbo 1.4 released] by Graham Banks, CCC, May 18, 2015
 * [|Fizbo version 1.5 released] by Youri Matiounine, CCRL Discussion Board, August 16, 2015
 * [|Fizbo version 1.5 released] by Graham Banks, CCC, August 16, 2015

2016

 * [|Fizbo version 1.6 released] by Youri Matiounine, CCRL Discussion Board, January 29, 2016
 * [|Fizbo 1.6 released] by Graham Banks, CCC, January 29, 2016
 * [|Fizbo 1.7 is released] by Youri Matiounine, CCC, March 23, 2016
 * [|Fizbo 1.8 released] by Youri Matiounine, CCC, August 26, 2016
 * [|Fizbo 1.9 released] by Youri Matiounine, CCC, December 31, 2016

2017

 * [|Fizbo 2 has been released] by Youri Matiounine, CCC, December 21, 2017

=External Links=

Chess Engine

 * [|Fizbo Chess Engine]
 * [|Fizbo] in CCRL 40/4
 * [|Fizbo] in CCRL 40/40

Misc

 * [|fizbo - Wiktionary]
 * [|Fizbo from Wikipedia]

=References= =What links here?= include page="Fizbo" component="backlinks" limit="40"
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