Rating CEDR=3714
BrainLearn is a free, powerful UCI chess engine derived from BrainFish. It is not a complete chess program and requires a UCI-compatible GUI (e.g. XBoard with PolyGlot, Scid, Cute Chess, eboard, Arena, Sigma Chess, Shredder, Chess Partner or Fritz) in order to be used comfortably.
Read the documentation for your GUI of choice for information about how to use Stockfish with it.
BrainLearn 24 - download
v.24:
Added book management section (thanks to Khalid Omar PolyFish: see the Readme)
Restored Minimum thinking time uci option
Stockfish patch May 7,2023:
Refine deeper post-lmr searches
This patch improves logic conditions for performing deeper searches after passed LMR.
Instead of exceeding alpha by some margin now it requires to exceed the
current best value - which may be lower than alpha (but never bigger since we
update alpha with bestvalue if it exceeds alpha).
Individual statistics: BrainLearn 21.1 - 840 games (+259,=575,- 6), 65.1 %
Critter 1.6a : 14 (+ 12,= 2,- 0), 92.9 %
Fritz 17 : 2 (+ 1,= 1,- 0), 75.0 %
Raubfisch X48e : 1 (+ 0,= 1,- 0), 50.0 %
SugaR AI 2.50 : 4 (+ 0,= 4,- 0), 50.0 %
Komodo 13.02 : 4 (+ 4,= 0,- 0), 100.0 %
Hiarcs 15.5 : 4 (+ 3,= 1,- 0), 87.5 %
RofChade 3.0 : 16 (+ 10,= 6,- 0), 81.2 %
Fat Titz 130122 : 1 (+ 0,= 1,- 0), 50.0 %
Slowchess 2.9 : 12 (+ 6,= 6,- 0), 75.0 %
Fisherov chess monk 1.2 : 32 (+ 0,= 32,- 0), 50.0 %
Revenge 3.0 : 22 (+ 10,= 12,- 0), 72.7 %
ProteusSF Piranha 220904 : 1 (+ 0,= 1,- 0), 50.0 %
Ethereal 13.88 Plus NNUE : 4 (+ 1,= 3,- 0), 62.5 %
Nebula-vortex 1.0 : 1 (+ 0,= 0,- 1), 0.0 %
Koivisto 8.16 : 2 (+ 1,= 1,- 0), 75.0 %
Berserk 10 : 4 (+ 2,= 2,- 0), 75.0 %
AI 27.0 : 3 (+ 0,= 3,- 0), 50.0 %
Vafra 12.2 Cfish : 6 (+ 2,= 4,- 0), 66.7 %
Seer 2.6 : 16 (+ 7,= 9,- 0), 71.9 %
Crystal 5 KWK : 4 (+ 0,= 4,- 0), 50.0 %
Kayra 1.7 : 36 (+ 0,= 35,- 1), 48.6 %
Berserk 20221129 : 12 (+ 3,= 9,- 0), 62.5 %
Caissa 1.4 : 6 (+ 4,= 2,- 0), 83.3 %
BrainLearn 20.1 vulkan : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 15.1 : 26 (+ 0,= 26,- 0), 50.0 %
RubiChess 20221203 : 16 (+ 10,= 6,- 0), 81.2 %
Knightx 3.6a : 2 (+ 2,= 0,- 0), 100.0 %
Igel 3.2.0 : 4 (+ 3,= 1,- 0), 87.5 %
Kookaburra 1.03a : 27 (+ 0,= 27,- 0), 50.0 %
Minic 3.32 : 2 (+ 1,= 1,- 0), 75.0 %
Little Goliath 3.16 : 6 (+ 5,= 1,- 0), 91.7 %
Viridithas 6.0.0 : 4 (+ 2,= 2,- 0), 75.0 %
Dragon 3.2 : 24 (+ 1,= 23,- 0), 52.1 %
Velvet 5.0.0 : 12 (+ 9,= 3,- 0), 87.5 %
Charisma Diamond : 10 (+ 0,= 10,- 0), 50.0 %
Minic 3.33 : 10 (+ 7,= 3,- 0), 85.0 %
Mittens 0.9 : 2 (+ 2,= 0,- 0), 100.0 %
Uralochka 3.39d : 18 (+ 10,= 8,- 0), 77.8 %
RukChess 3.0.13 NNUE2 : 2 (+ 1,= 1,- 0), 75.0 %
Seawall 20230105 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish 20230104 : 4 (+ 0,= 4,- 0), 50.0 %
Rebel 16.1 : 14 (+ 6,= 8,- 0), 71.4 %
Captain 3.1 : 2 (+ 2,= 0,- 0), 100.0 %
Eman 8.60 : 14 (+ 2,= 12,- 0), 57.1 %
Sting Black Hole 3 : 8 (+ 8,= 0,- 0), 100.0 %
Blue Marlin 15.6 : 41 (+ 2,= 38,- 1), 51.2 %
Carp 1.1.0 : 4 (+ 4,= 0,- 0), 100.0 %
Zagreus 1.1.0 : 4 (+ 4,= 0,- 0), 100.0 %
Clovis I : 4 (+ 4,= 0,- 0), 100.0 %
Raven 1.30 : 4 (+ 4,= 0,- 0), 100.0 %
Koivisto 8.17 : 8 (+ 3,= 5,- 0), 68.8 %
Peacekeeper 1.1 : 4 (+ 4,= 0,- 0), 100.0 %
Akimbo 0.1.1 : 4 (+ 4,= 0,- 0), 100.0 %
BlackCore 5.0 : 6 (+ 4,= 2,- 0), 83.3 %
Stockfish 20230114 : 12 (+ 0,= 12,- 0), 50.0 %
4ku 1.1 : 2 (+ 2,= 0,- 0), 100.0 %
Igel 3.3.0 : 8 (+ 6,= 2,- 0), 87.5 %
Inanis 1.2.0 : 4 (+ 4,= 0,- 0), 100.0 %
Koivisto 9.0 : 16 (+ 8,= 8,- 0), 75.0 %
Polyfish 230115 : 14 (+ 0,= 14,- 0), 50.0 %
Caissa 1.5 : 12 (+ 10,= 2,- 0), 91.7 %
CorChess 20230114 : 2 (+ 0,= 2,- 0), 50.0 %
Charisma Saphir : 6 (+ 0,= 6,- 0), 50.0 %
ShashChess 27.2 : 4 (+ 1,= 3,- 0), 62.5 %
CorChess 20230104 : 4 (+ 0,= 4,- 0), 50.0 %
Stockfish 20230109 : 2 (+ 0,= 2,- 0), 50.0 %
ShashChess 27.1 : 6 (+ 0,= 6,- 0), 50.0 %
4ku : 2 (+ 2,= 0,- 0), 100.0 %
Lc0 0.30.0-dag+git.19fc042 : 2 (+ 0,= 2,- 0), 50.0 %
CorChess 20230124 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 20230125 : 4 (+ 0,= 4,- 0), 50.0 %
Viridithas 7.0.0 : 8 (+ 6,= 2,- 0), 87.5 %
Vafra 12.3 Cfish : 8 (+ 2,= 6,- 0), 62.5 %
CorChess 20230125 : 6 (+ 0,= 6,- 0), 50.0 %
Eman 8.70 : 18 (+ 0,= 18,- 0), 50.0 %
Igel 3.4.0 : 8 (+ 1,= 7,- 0), 56.2 %
Stockfish 20230202 : 4 (+ 0,= 4,- 0), 50.0 %
Polyfish 230202 : 12 (+ 1,= 11,- 0), 54.2 %
ShashChess 28 : 18 (+ 0,= 16,- 2), 44.4 %
Charisma Light 2 : 4 (+ 0,= 3,- 1), 37.5 %
CorChess 20230210 : 5 (+ 0,= 5,- 0), 50.0 %
Caissa 1.6 : 2 (+ 1,= 1,- 0), 75.0 %
Velvet 5.1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Fat Fritz 2 : 12 (+ 0,= 12,- 0), 50.0 %
Redfish 220921 : 1 (+ 1,= 0,- 0), 100.0 %
Spectral 070722 : 1 (+ 1,= 0,- 0), 100.0 %
Patzer AI 020223 : 6 (+ 0,= 6,- 0), 50.0 %
Berserk 11 : 2 (+ 0,= 2,- 0), 50.0 %
Clover 3.3.1 : 2 (+ 1,= 1,- 0), 75.0 %
Caissa 1.6.3 : 4 (+ 3,= 1,- 0), 87.5 %
Rebel 16.2 : 12 (+ 7,= 5,- 0), 79.2 %
Stockfish 20230218 : 6 (+ 0,= 6,- 0), 50.0 %
Berserk 11.1 : 10 (+ 2,= 8,- 0), 60.0 %
Koivisto 9.2 : 14 (+ 9,= 5,- 0), 82.1 %
Charisma Light 1.0 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 20230128 : 4 (+ 0,= 4,- 0), 50.0 %
CorChess 20230202 : 2 (+ 0,= 2,- 0), 50.0 %
Charisma Blitz : 4 (+ 0,= 4,- 0), 50.0 %
Ethereal 14.00 NNUE : 14 (+ 6,= 8,- 0), 71.4 %
Stockfish 20230209 : 2 (+ 0,= 2,- 0), 50.0 %
Berserk 20230130b : 2 (+ 1,= 1,- 0), 75.0 %
Charisma 250223 : 12 (+ 1,= 11,- 0), 54.2 %
CorChess 20230226 : 6 (+ 0,= 6,- 0), 50.0 %
BlackCore 6.0 : 2 (+ 2,= 0,- 0), 100.0 %
Booot 7.1 : 2 (+ 2,= 0,- 0), 100.0 %
BrainLearn 22 : 2 (+ 0,= 2,- 0), 50.0 %
YuliGM PrO 5.0 : 2 (+ 0,= 2,- 0), 50.0 %
Wasp 6.50 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish 20230227 : 4 (+ 0,= 4,- 0), 50.0 %
Clovis III : 2 (+ 2,= 0,- 0), 100.0 %
ShashChess 29 : 2 (+ 0,= 2,- 0), 50.0 %
Flounder 0.4.0.0 : 2 (+ 1,= 1,- 0), 75.0 %
SF-Solidor_PL : 2 (+ 0,= 2,- 0), 50.0 %
Leptir 280223 : 4 (+ 0,= 4,- 0), 50.0 %
Leptir Classic : 2 (+ 0,= 2,- 0), 50.0 %
BrainLearn progress:
| Pl | Engine | CEDR | Score | Games | (%) |
| 18 | Brainlearn 20.1 vulkan | 3730.5 | 35.50 | 52 | 68.27 |
| 48 | BrainLearn 20 | 3716.4 | 321.00 | 490 | 65.51 |
| 68 | BrainLearn 21.1 | 3711.5 | 499.50 | 764 | 65.38 |
| 79 | BrainLearn 19 | 3709.6 | 154.00 | 259 | 59.46 |
| 126 | BrainLearn 19.2.1 | 3701.8 | 79.00 | 118 | 66.95 |
| 141 | BrainLearn 19.1 | 3699.1 | 51.00 | 84 | 60.71 |
| 151 | BrainLearn 19.2 | 3696.8 | 54.00 | 78 | 69.23 |
| 173 | BrainLearn 20.2 | 3694.2 | 280.50 | 458 | 61.24 |
| 184 | BrainLearn 18 | 3692.4 | 209.00 | 336 | 62.20 |
| 195 | BrainLearn 061122 | 3690.5 | 50.00 | 96 | 52.08 |
| 222 | BrainLearn 17 | 3681.8 | 150.00 | 264 | 56.82 |
| 242 | BrainLearn 21 | 3674.7 | 101.50 | 148 | 68.58 |
| 287 | BrainLearn 9.0 | 3611.6 | 13.50 | 18 | 75.00 |
BrainLearn 24 - download
github:https://github.com/amchess/BrainLearn/releases/tag/24
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