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============================== My email: jotes@go2.pl



Chess engines: Polaris 1.6.0

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Polaris is a UCI chess engine, a full rewrite of its predecessor (my first attempt at a chess engine, also named Polaris).

Rating CEDR=2816

v.1.6:
added countermoves
tweaked nmp
added lazy smp
significantly improved lmr
added see pruning
added continuation history
added check extension
added singular extension
various fixes and tweaks
Unlike the past two major versions, 1.6.0 is almost purely an elo release. It does, however, now have support for multithreading - this works fine as far as I know, but seems to scale strangely on some CPUs and should be considered to be in beta.

Note: rare crashes have been observed on a few machines, usually on shorter time controls. This issue is proving extremely difficult to track down, as it does not occur on my development machine, and will be fixed in a patch (presumably 1.6.1) when found.

Individual statistics: Polaris 1.4.1 - 142 games (+ 25,= 23,- 94), 25.7 %
Critter 1.6a                  :   4 (+  0,=  0,-  4),  0.0 %
Rebel 16.2                    :   2 (+  0,=  0,-  2),  0.0 %
Leorik 2.4                    :   2 (+  1,=  0,-  1), 50.0 %
Peacekeeper 1.3               :   2 (+  2,=  0,-  0), 100.0 %
Viridithas 8.1.0              :   2 (+  0,=  0,-  2),  0.0 %
Eman 8.90                     :   2 (+  0,=  0,-  2),  0.0 %
CfishNN 20230329              :   2 (+  0,=  0,-  2),  0.0 %
Deep Blue 230329              :   2 (+  0,=  0,-  2),  0.0 %
CorChess 20230401             :   2 (+  0,=  0,-  2),  0.0 %
Arasan 23.5                   :   8 (+  0,=  0,-  8),  0.0 %
Knightx 3.7b                  :   8 (+  1,=  4,-  3), 37.5 %
Mayhem 8.1                    :   8 (+  2,=  2,-  4), 37.5 %
Lc0 0.30.0-dev+git.9a205320   :   2 (+  0,=  0,-  2),  0.0 %
Polyfish 20230402             :   2 (+  0,=  0,-  2),  0.0 %
Svart 3                       :   2 (+  0,=  0,-  2),  0.0 %
Tenax 0.7.7                   :   8 (+  0,=  0,-  8),  0.0 %
Altair 2.0.0                  :   8 (+  1,=  1,-  6), 18.8 %
BrainLearn 23.1               :   4 (+  0,=  0,-  4),  0.0 %
Jangine 2023-03-31            :   6 (+  6,=  0,-  0), 100.0 %
Midnight 5.0                  :   6 (+  0,=  3,-  3), 25.0 %
MrBob 1.2.0                   :   6 (+  0,=  1,-  5),  8.3 %
Polyfish 20230410             :   4 (+  0,=  0,-  4),  0.0 %
Renegade 0.10.0               :   6 (+  3,=  2,-  1), 66.7 %
RubiChess 20230410            :   6 (+  0,=  0,-  6),  0.0 %
AI 28.0                       :   4 (+  0,=  0,-  4),  0.0 %
ShashChess 31.1               :   4 (+  0,=  0,-  4),  0.0 %
Zangdar 2.14.06               :   6 (+  3,=  3,-  0), 75.0 %
Svart 3.1                     :   6 (+  0,=  3,-  3), 25.0 %
Willow 2.7                    :   6 (+  2,=  3,-  1), 58.3 %
Akimbo 0.2.0                  :   6 (+  4,=  1,-  1), 75.0 %
Clover 4.0                    :   4 (+  0,=  0,-  4),  0.0 %
Corchess 20230410             :   2 (+  0,=  0,-  2),  0.0 %

Polaris 1.6.0 download

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