Chess engine: Reckless 0.7.0

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Introducing Reckless, a Rust-based UCI chess engine.
Author: Arseniy Surkov   Rating Chess Engines Diary CEDR=3360

v.0.7.0:
Release Notes
The NNUE hidden layer size has been increased from 128 to 384, further improved by adding 4 output buckets (#56) and material scaling (#62). The final architecture is (768 -> 384)x2 -> 1x4.

Changelog
Time management
Time adjustment based on score stability (#50)
Time adjustment based on best move stability (#42)
Performance optimizations
Allocate a quiet move list on the stack (#51)
Implement operation fusion for NNUE (#58)
Optimize accumulator handling (#59)
Various search improvements
History tuning (#39)
Null Move Pruning tuning (#54)
Check extensions before the move loop (#40)
Disable quiescence search pruning for recaptures (#35)
Treat non-winning captures as unfavorable in quiescence search (#57)
Static Exchange Evaluation (#36, #37, #44, and #61)
Fully fractional LMR (#60)
Features
Mate Distance Pruning (#43)
Multi-threaded transposition table initialization (#63)
Full Changelog: v0.6.0...v0.7.0

Self-Play Benchmark Against v0.6.0
STC 8.0+0.08s

Elo   | 172.12 +- 11.31 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=32MB
Games | N: 2000 W: 1007 L: 90 D: 903
Penta | [6, 38, 229, 487, 240]
LTC 40.0+0.4s

Elo   | 154.77 +- 13.83 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 1002 W: 449 L: 30 D: 523
Penta | [0, 16, 136, 263, 86]

Reckless 0.6.0 - results:
OpponentScore+-Games
Lynx 1.4.010/10+1010 Games
Rice 8.0.03/10-410 Games
Jet 1.26/9+39 Games
Rebel 16.30.5/9-89 Games
Sloth 1.78/8+88 Games
Berserk 202403112/8-48 Games
Marauders 3.00.5/8-78 Games
Stockfish 16.10.5/8-78 Games
Piglet 1.3.57/7+77 Games
HypnoS 1903240/7-77 Games
Clover 6.1.190.5/6-56 Games
DanaSah 9.14.5/5+45 Games
Combusken 2.0.03.5/5+25 Games
SF 16.1 MPV0/5-55 Games
Knightx 3.94/4+44 Games
Ippolit 0323243.5/4+34 Games
Mida 2.3.13/4+24 Games
LTChess 9.32/4+04 Games
MrBob 1.3.01/4-24 Games
Equisetum 1.01/4-24 Games
Alexandria 6.1.01/4-24 Games


Reckless 0.7.0 download


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