Tofiks - UCI chess engine
Rating CEDR=2256
Tofiks 1.5.0 – this is the version we entered in the qualifying rounds for the Chess Engine League. Does this engine have a chance of making it to the TOP-64? – check back soon and you'll see the results.
Tofiks 1.5.0 what's new?
Evaluation
Passed-pawn king-proximity Own-king distance and enemy-king distance to passers, tapered.
Threat-aware captures Capture scoring accounts for enemy threats on the landing square.
Bad bishop Penalty for bishops blocked by own pawns on their own color.
Texel retune Open Bench testing provides endless games for continuous Texel tunes.
Search
LMR verification re-search Full-depth null-window verification when a reduced search returns value > alpha. Allows more aggressive LMR.
SE fix SE was not properly applied due to a TT-cutoff gate bug during verification search.
Q-search fail-soft. Quiescence now returns the best score found rather than clamping to the window, consistent with main search.
Time management
Extend on falling eval When eval drops between iterations extend time.
UCI and infrastructure
seldepth now reported in UCI info.
Debug-build with search stats allowing to benchmark the efficiency of various heuristics
Results
Round robin tournament with previous releases with 15s+0.2s time control:
Rank Name Elo +/- Games Wins Losses Draws Points Score
1 tofiks-1.5 330 33 600 474 30 96 522.0 87.0%
2 tofiks-1.4.1 182 28 600 390 102 108 444.0 74.0%
3 tofiks-1.3 -214 29 600 81 410 109 135.5 22.6%
4 tofiks-1.2 -283 31 600 46 449 105 98.5 16.4%
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