Releases: jhellis3/Stockfish
Crystal 8
Crystal 7 CMB
Various cleanups, consolidations, and simplifications
Extend supported depth
Improved progress detection
Improved TB efficiency
Bench: 7393911
Additional compiles courtesy of IpMan may be found at: https://ipmanchess.yolasite.com/compiles.php
Crystal 6 PMT
Bug fix for reductions.
Improvements to prob cut logic.
Improved NMP safety.
Score now weighted on traditional values.
New, more efficient TB handling in certain situations.
Introduced framework for future development based on first principles.
Restored some reductions/extensions from Stockfish.
Merged upstream changes from Stockfish.
Bench: 9298798
Additional compiles by Ipman may be found at: https://ipmanchess.yolasite.com/compiles.php
Crystal 5 KWK
Improvements to mate finding & progress detection.
Relative strength increase on top of upstream improvements is ~10 Elo.
Bench: 5390492
Compiles courtesy of IpMan: https://ipmanchess.yolasite.com/compiles.php
Crystal v4.1
Includes a number of bugfixes, search enhancements, and upstream merges.
Cursed/Blessed tablebase results are now displayed as scores in the 80's range when the 50 move rule is disabled in order to distinguish them from regular TB hits which continue to be scored in the 90's.
Bench: 6485199
Compiles by IpMan: https://ipmanchess.yolasite.com/compiles.php
Crystal v4.0
This update encompasses many changes from both upstream and original work. Effort has been put into narrowing the tree without sacrificing tactical ability, thus improving scaling. While it should remain a fair bit weaker than default Stockfish, the relative Elo gap has hopefully been lessened and general strength improved.
Bench: 5405822
Additional compiles by IpMan may be found at: http://ipmanchess.yolasite.com/compiles.php
Crystal v3.2
Small pruning and LMR adjustments.
Added NNUE scaling.
Merged upstream.
Bench: 8708696
Compiles courtesy of IpMan may be found at: http://ipmanchess.yolasite.com/compiles.php
Crystal v3.1
False mate bugfix from upstream.
Code cleanup & pruning enhancements.
Improved progress scoring.
Bench: 7950574
Compiles courtesy of IpMan may be found at: http://ipmanchess.yolasite.com/compiles.php
Crystal v3.0
Numerous fixes since v2.0.
Introduction of eval smoothing.
Introduction of NNUE.
Bench: 6080718
Crystal v2.0
King danger search enhancements
Bench: 10718459
Compiles by IpMan: http://ipmanchess.yolasite.com/compiles.php