Berserk - UCI chess engine ( written in C).
Author: Jay Honnold
Rating CEDR=3593 (7 place)
v.11:
What's Changed
Don't increase reductions for cutnodes when the move is tactical by @jhonnold in #417
Between search optimizations by @jhonnold in #418
Disable SE Extensions when clearly winning by @jhonnold in #419
Fast Range over modulo for TT indexing by @jhonnold in #420
Setup Pyrrhic submodule by @jhonnold in #421
Remove depth requirement on eval adjustment by @jhonnold in #422
Fix recapture extension extending non-captures by @jhonnold in #423
Introduce negative reductions when hash move is singular by @jhonnold in #424
Update Github Workflow to force Ubuntu 20.04 by @jhonnold in #425
Standard LMR + PVS Logic by @jhonnold in #426
Search Stack by @jhonnold in #428
Combined Patches by @jhonnold in #430
Cleanup by @jherrera80 in #429
MovePicker Refactor by @jhonnold in #433
Prevent positive score differences from impacting TM by @jhonnold in #435
12 Byte TT Entries by @jhonnold in #437
Accumulator Cleanup by @jhonnold in #438
QSearch ordering strictly based on Capture History by @jhonnold in #439
Utilize 128bit multiplication for TT indexing by @jhonnold in #440
Train with a mix of Berserk and Koivisto data by @jhonnold in #445
Track bestmove using "Root Moves" by @jhonnold in #446
Move Type in Continuation History by @jhonnold in #447
Add simple protections for search explosions due to extensions by @jhonnold in #448
History values fit within int16_t by @jhonnold in #449
Remove SF Chess960 Cornered Bishop Logic by @jhonnold in #450
General Cleanups by @jhonnold in #451
Speedups by @jhonnold in #452
Optimize Apply Updates by @jhonnold in #453
Additional continuation histoy for follow-follow up by @jhonnold in #454
Separate Move Pickers by @jhonnold in #455
Hold TT Entry by @jhonnold in #456
Increase hidden layer to 768 neurons by @jhonnold in #458
No TT eval correction in QSearch by @jhonnold in #459
Updates by @jhonnold in #460
Add PV TT Eval correction in QSearch by @jhonnold in #461
Identify upcoming repetitions by @jhonnold in #462
Add WDL Output and Normalize CP to 50% at 100cp by @jhonnold in #463
Utilize LMR Depth when move pruning quiets by @jhonnold in #465
History Pruning by @jhonnold in #466
Split Good and Bad captures with history and SEE by @jhonnold in #467
Individual statistics: Berserk 10-dev, 530 games (+133,=296,-101), 53.0 %
Fritz 17 : 2 (+ 1,= 1,- 0), 75.0 %
Raubfisch X48e : 8 (+ 0,= 7,- 1), 43.8 %
SugaR AI 2.50 : 8 (+ 0,= 6,- 2), 37.5 %
Dragon 2.6.1 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 15 : 8 (+ 0,= 4,- 4), 25.0 %
Fisherov 0.98k : 6 (+ 0,= 6,- 0), 50.0 %
Lc0 0.29.0-rc0 : 8 (+ 1,= 7,- 0), 56.2 %
Arasan 23.3 : 2 (+ 0,= 2,- 0), 50.0 %
Hiarcs 15.5 : 4 (+ 2,= 2,- 0), 75.0 %
Caissa 0.5 NNUE : 2 (+ 1,= 1,- 0), 75.0 %
RofChade 3.0 : 2 (+ 1,= 1,- 0), 75.0 %
Fisherov chess monk SE : 10 (+ 0,= 6,- 4), 30.0 %
Slowchess 2.9 : 6 (+ 0,= 5,- 1), 41.7 %
Pedone 3.1 : 2 (+ 1,= 1,- 0), 75.0 %
Koivisto 8.13 : 12 (+ 3,= 9,- 0), 62.5 %
Fisherov chess monk 1.2 : 18 (+ 0,= 11,- 7), 30.6 %
EMAN 8.10 : 2 (+ 0,= 2,- 0), 50.0 %
FoxSEE 8.2 : 2 (+ 2,= 0,- 0), 100.0 %
Rebel 15.1 : 2 (+ 1,= 0,- 1), 50.0 %
Leorik 2.2 : 2 (+ 2,= 0,- 0), 100.0 %
Swordfish 15.3 : 4 (+ 0,= 3,- 1), 37.5 %
Dumb 1.10 : 2 (+ 2,= 0,- 0), 100.0 %
Kayra 1.5 : 6 (+ 0,= 5,- 1), 41.7 %
Lozza 2.4 : 2 (+ 2,= 0,- 0), 100.0 %
Blunder 8.5.5 : 4 (+ 4,= 0,- 0), 100.0 %
Nalwald 16 : 4 (+ 4,= 0,- 0), 100.0 %
ShashChess 23 : 10 (+ 0,= 7,- 3), 35.0 %
ProteusSF RBE 008c : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 130722 : 8 (+ 0,= 5,- 3), 31.2 %
BrainLearn 18 : 18 (+ 0,= 11,- 7), 30.6 %
Avalanche 1.1.0 : 6 (+ 6,= 0,- 0), 100.0 %
Caissa 0.8.0 : 8 (+ 7,= 1,- 0), 93.8 %
CorChess 250722 : 4 (+ 0,= 3,- 1), 37.5 %
EMAN 8.20 : 20 (+ 0,= 16,- 4), 40.0 %
StockNemo 4.0.0.1 : 8 (+ 8,= 0,- 0), 100.0 %
Stockfish 250722 Ivec : 4 (+ 0,= 2,- 2), 25.0 %
Fritz 18 : 4 (+ 3,= 1,- 0), 87.5 %
Maelstrom 1.0.1 : 6 (+ 6,= 0,- 0), 100.0 %
Stockfish 240722 Ivec : 4 (+ 0,= 4,- 0), 50.0 %
CorChess 240722 : 4 (+ 0,= 4,- 0), 50.0 %
Arasan 23.4 : 10 (+ 3,= 7,- 0), 65.0 %
Bagatur 3.5 : 2 (+ 2,= 0,- 0), 100.0 %
Stockfish 020822 Ivec : 2 (+ 0,= 2,- 0), 50.0 %
Virtue 2.3.0 : 2 (+ 2,= 0,- 0), 100.0 %
CorChess 020822 : 2 (+ 0,= 1,- 1), 25.0 %
Eubos 2.3 : 2 (+ 2,= 0,- 0), 100.0 %
Fire-zero 08032022 : 2 (+ 2,= 0,- 0), 100.0 %
Inanis 1.1.0 : 4 (+ 3,= 1,- 0), 87.5 %
Knightx 3.4 : 6 (+ 6,= 0,- 0), 100.0 %
Lumac0 13.2 : 3 (+ 3,= 0,- 0), 100.0 %
Alexandria 2.3.1 : 2 (+ 1,= 1,- 0), 75.0 %
Vault 0.4 : 2 (+ 2,= 0,- 0), 100.0 %
Viridithas 2.4.2 : 4 (+ 4,= 0,- 0), 100.0 %
CorChess 060822 : 8 (+ 0,= 6,- 2), 37.5 %
Ceibo 0.9 : 4 (+ 4,= 0,- 0), 100.0 %
Black Marlin 7.0 : 6 (+ 5,= 1,- 0), 91.7 %
ShashChess 23.1 : 4 (+ 0,= 3,- 1), 37.5 %
Blue Marlin 15.3 : 4 (+ 0,= 3,- 1), 37.5 %
Stockfish 060822 Ivec : 8 (+ 0,= 5,- 3), 31.2 %
RubiChess 20220813 : 10 (+ 2,= 8,- 0), 60.0 %
ShashChess 23.1.1 : 6 (+ 0,= 1,- 5), 8.3 %
Velvet 4.1.0 : 6 (+ 5,= 1,- 0), 91.7 %
Inanis 1.1.1 : 2 (+ 2,= 0,- 0), 100.0 %
Bagatur 3.6 : 2 (+ 2,= 0,- 0), 100.0 %
Flaming Titz 230822 : 4 (+ 0,= 3,- 1), 37.5 %
Wasp 6.00 : 8 (+ 2,= 6,- 0), 62.5 %
Ethereal 13.75 NNUE : 4 (+ 2,= 2,- 0), 75.0 %
Dragon 3.1 : 10 (+ 0,= 7,- 3), 35.0 %
Eman 8.20 : 14 (+ 0,= 9,- 5), 32.1 %
Revenge 3.0 : 8 (+ 0,= 6,- 2), 37.5 %
CorChess 130822 : 4 (+ 0,= 3,- 1), 37.5 %
ProteusSF 030822 : 8 (+ 0,= 7,- 1), 43.8 %
Blue Marlin 15.3a : 14 (+ 0,= 8,- 6), 28.6 %
Stockfish 150822 : 2 (+ 0,= 1,- 1), 25.0 %
Swordfish 15.3a : 6 (+ 0,= 3,- 3), 25.0 %
Minic 3.27 : 2 (+ 0,= 2,- 0), 50.0 %
Stockfish 170822 : 4 (+ 0,= 1,- 3), 12.5 %
Seer 2.5.0 : 6 (+ 0,= 6,- 0), 50.0 %
Minic 3.28 : 6 (+ 2,= 4,- 0), 66.7 %
Teal Oracle : 2 (+ 0,= 1,- 1), 25.0 %
BigBallz 010922 : 4 (+ 0,= 3,- 1), 37.5 %
ShashChess 24 : 8 (+ 0,= 7,- 1), 43.8 %
Kayra 1.5 Dynamics : 8 (+ 0,= 6,- 2), 37.5 %
Fire-zero 09022022 : 1 (+ 1,= 0,- 0), 100.0 %
Stockfish 070922 : 4 (+ 0,= 3,- 1), 37.5 %
CorChess 170822 : 8 (+ 0,= 5,- 3), 31.2 %
ProteusSF Piranha 220904 : 6 (+ 0,= 3,- 3), 25.0 %
Minic 3.30 : 6 (+ 5,= 1,- 0), 91.7 %
Booot 7.0 : 4 (+ 2,= 2,- 0), 75.0 %
Polyfish 220826 : 4 (+ 0,= 2,- 2), 25.0 %
Stockfish 170922 : 4 (+ 0,= 3,- 1), 37.5 %
CorChess 170922 : 2 (+ 0,= 1,- 1), 25.0 %
Ethereal 13.88 : 4 (+ 2,= 2,- 0), 75.0 %
Lc0 0.30.0-dev+git.6d9bd9d : 2 (+ 0,= 1,- 1), 25.0 %
Dark Sister 1.9 : 2 (+ 0,= 1,- 1), 25.0 %
Fire-zero 09202022 : 2 (+ 2,= 0,- 0), 100.0 %
Kayra 1.6 : 2 (+ 0,= 1,- 1), 25.0 %
Koivisto 8.16 : 6 (+ 0,= 6,- 0), 50.0 %
Kayra 1.5 Attack : 2 (+ 1,= 1,- 0), 75.0 %
Stockfish 290822 : 2 (+ 0,= 1,- 1), 25.0 %
Uralochka 3.38c : 4 (+ 4,= 0,- 0), 100.0 %
Slowchess 2.7 : 2 (+ 1,= 1,- 0), 75.0 %
Caissa 1.0 : 2 (+ 2,= 0,- 0), 100.0 %
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