Reckless 0.8.0 dev-2fe JA - new version chess engine

 


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 0.8.0 JA vs other engines:
Kopyto 0.1.0 JA2/2+22 Games
Dumb 2.32/2+22 Games
Chesslib 0.0.3 JA2/2+22 Games
Victoria 0.1 JA2/2+22 Games
Shallow Guess 0.1.0 JA2/2+22 Games
Rodent IV 0.33 JA2/2+22 Games
Meltdown 0.1 JA2/2+22 Games
PzChessBot 20250311T07 JA2/2+22 Games
Nakshatra 0.1 JA2/2+22 Games
Melsh Bot 1.0 JA2/2+22 Games
Limbobot 0.1 JA2/2+22 Games
Gravy 1.0 JA2/2+22 Games
Seawall 20250322 JA2/2+22 Games
Chess-3 JA2/2+22 Games
Ultrabrick dev.bd5adb0 JA2/2+22 Games
Maello 0.1 JA2/2+22 Games
Princhess 0.20 JA1.5/2+12 Games
Perseus 1.0 JA1.5/2+12 Games
Cheng4 0.481.5/2+12 Games
Pawn 3.0 JA1.5/2+12 Games
Cinder 0.1.3 JA1.5/2+12 Games


Jim Ablett compiles:


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