Winter is a chess engine that relies on the UCI protocol to communicate with a GUI.
Contributors: Jonathan Rosenthal, Jonathan Maurer, Jonas Kuratli.
Rating JCER=3227
v.2.0:
The primary change in this major release is due to more self play data to train a better network. Holes in elementary endgames have been closed, so play in many of those positions should be noticeably better.
Huge thank you to Seer author Connor McMonigle, who generated the Windows Winter compiles for this version. Without this, there is a good chance I would procrastinate the release for another couple of weeks!
Also thank you to Andrew Grant and the contributors to OpenBench, without whom it would not be possible to test changes to Winter with any statistical significance.
Self play results in DFRC bullet testing:
Winter v2.0 vs Winter v1.0
ELO | 100.40 +- 7.99 (95%)
CONF | 40.0+0.40s Threads=1 Hash=64MB
GAMES | N: 5000 W: 2344 L: 938 D: 1718
Individual statistics: Winter 1.0 - 165 games (+ 99,= 28,- 38), 68.5%
Schooner 2.2 : 2 (+ 0,= 0,- 2), 0.0 %
Andscacs 0.95092 : 2 (+ 0,= 2,- 0), 50.0 %
Laser 1.7 : 2 (+ 1,= 0,- 1), 50.0 %
Critter 1.6a : 6 (+ 4,= 1,- 1), 75.0 %
Hiarcs 15.5 : 2 (+ 0,= 1,- 1), 25.0 %
Orion 0.9 : 2 (+ 1,= 1,- 0), 75.0 %
Colossus 2022a : 2 (+ 2,= 0,- 0), 100.0 %
Vafra 3.3.2 : 2 (+ 1,= 1,- 0), 75.0 %
DanaSah 9.0 : 2 (+ 1,= 1,- 0), 75.0 %
MrBob 1.1.0 : 2 (+ 0,= 1,- 1), 25.0 %
Slowchess 2.9 : 2 (+ 0,= 0,- 2), 0.0 %
Defenchess 2.3 : 2 (+ 0,= 1,- 1), 25.0 %
Tornado Dec 9 2020 : 2 (+ 0,= 2,- 0), 50.0 %
Invictus r382 : 2 (+ 0,= 1,- 1), 25.0 %
Uralochka 3.37c : 2 (+ 0,= 1,- 1), 25.0 %
Nalwald 16 : 2 (+ 2,= 0,- 0), 100.0 %
Mantissa 3.7.2 : 2 (+ 1,= 0,- 1), 50.0 %
CT800 1.44 : 2 (+ 2,= 0,- 0), 100.0 %
Knightx 3.5 : 2 (+ 2,= 0,- 0), 100.0 %
Frozenight 5.1.0 : 2 (+ 0,= 2,- 0), 50.0 %
Lynx 0.12.0 : 2 (+ 2,= 0,- 0), 100.0 %
Viridithas 3.0.0 : 2 (+ 2,= 0,- 0), 100.0 %
Prophet 4.3 : 6 (+ 6,= 0,- 0), 100.0 %
Seer 2.6 : 2 (+ 0,= 0,- 2), 0.0 %
Captain 2.0 : 4 (+ 4,= 0,- 0), 100.0 %
Caissa 1.2 : 4 (+ 0,= 3,- 1), 37.5 %
SF Halloween 2022 : 2 (+ 0,= 0,- 2), 0.0 %
BrainLearn 19.2 : 2 (+ 0,= 0,- 2), 0.0 %
ShashChess 25.3 : 2 (+ 0,= 0,- 2), 0.0 %
Stockfish 301022 : 2 (+ 0,= 0,- 2), 0.0 %
Viridithas 4.0.0 : 4 (+ 4,= 0,- 0), 100.0 %
Seawall 20221105 : 6 (+ 6,= 0,- 0), 100.0 %
CDrill 2000 : 8 (+ 8,= 0,- 0), 100.0 %
Fire Zero 10262022 : 2 (+ 0,= 1,- 1), 25.0 %
Fornax 4.0 : 10 (+ 10,= 0,- 0), 100.0 %
Crystal 5 KWK : 2 (+ 0,= 0,- 2), 0.0 %
Stash 34.0 : 8 (+ 1,= 4,- 3), 37.5 %
Mayhem 7.6 : 8 (+ 7,= 1,- 0), 93.8 %
Avalanche 1.3.0 : 2 (+ 2,= 0,- 0), 100.0 %
BlackCore 3.0 : 2 (+ 2,= 0,- 0), 100.0 %
Shenyu 1.0.1 : 2 (+ 2,= 0,- 0), 100.0 %
Kimbo 0.3.0 : 4 (+ 4,= 0,- 0), 100.0 %
Demon 1.2 : 2 (+ 2,= 0,- 0), 100.0 %
Caissa 1.3 : 2 (+ 1,= 0,- 1), 50.0 %
Bienchen 1.0 : 2 (+ 2,= 0,- 0), 100.0 %
Sturddle 1.04 : 2 (+ 1,= 1,- 0), 75.0 %
Eubos 2.15 : 4 (+ 4,= 0,- 0), 100.0 %
Axon 0.1 : 1 (+ 1,= 0,- 0), 100.0 %
Alexandria 3.0.2 : 2 (+ 1,= 1,- 0), 75.0 %
Mayhem 7.7 : 2 (+ 2,= 0,- 0), 100.0 %
RubiChess 20221120 : 2 (+ 0,= 0,- 2), 0.0 %
Counter 5.0 : 2 (+ 0,= 0,- 2), 0.0 %
Caissa 1.4 : 2 (+ 0,= 1,- 1), 25.0 %
RapChess 2022-10-25 : 6 (+ 6,= 0,- 0), 100.0 %
Fire-zero 10262022 : 2 (+ 0,= 1,- 1), 25.0 %
Chess4j 5.1 : 2 (+ 2,= 0,- 0), 100.0 %
Velvet 5.0.0 : 2 (+ 0,= 0,- 2), 0.0 %
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