Igel - UCI chess engine, Rating Chess Engines Diary CEDR=3707
Author : Volodymyr Shcherbyna (Fork of GreKo 2018.01)
v.3.7.0:
v.3.7.0:
What's new:
fix draw detection
fix history overflow
fix mate score for probcut
use fifty move guard on tt in qsearch
update piece stack for null move pruning
improve tt replace strategy
fix ply coherence in singular search
fix undefined behavior in history
fix undo bug
apply incheck futility guard
use tt for skipmove positions
order moves during probcut
detect bmi2 in basic makefile
revert standard network back to c049c117
support vnni256
optimize quiets pickup
speed-up castling
store tt wdl result as a bonus
fix tb probing with wrong castling rights
reduce tt captures
minimize see calls
implement finny table
implement counter move table
track best move stability
use tt for null moves
release new standard network
implement evalfile parameter
fix tb tt bug
restore hce build for tcec
probe dtz
fix tt castling bit for frc
cache hash entry
speed-up inferencing code
implement avx512 support
improve voting system
fix gcc14 build
implement frc mode
improve speed
support longer games
optimize sort
penalize bad captures
Regression run against Igel 3.6.0 at Long Time Control (60+0.6):
Score of Igel 3.7.0 64 BMI2 AVX512 VNNI512 vs Igel 3.6.0 64 BMI2 AVX2: 6161 - 1832 - 7449 [0.640] 15442
Elo difference: 100.1 +/- 3.9, LOS: 100.0 %, DrawRatio: 48.2 %
Regression run against Igel 3.6.0 at Short Time Control (10+0.1):
Score of Igel 3.7.0 64 BMI2 AVX512 VNNI512 vs Igel 3.6.0 64 BMI2 AVX2: 7122 - 2188 - 7167 [0.650] 16477
Elo difference: 107.3 +/- 4.0, LOS: 100.0 %, DrawRatio: 43.5 %
Igel 3.6.0 JA vs other engines
| Motor 0.8.0 JA | 18/46 | -10 | 46 Games |
| Velvet 8.1.1 JA | 18.5/40 | -3 | 40 Games |
| Clover 8.1 JA | 17.5/40 | -5 | 40 Games |
| Integral v6 | 14.5/36 | -7 | 36 Games |
| Caissa 1.21 | 13/36 | -10 | 36 Games |
| Revenge 4.0 | 16/30 | +2 | 30 Games |
| Lizard 11.2 | 14.5/30 | -1 | 30 Games |
| Horsie 1.0.6 JA | 11/26 | -4 | 26 Games |
| Starzix 6.0 | 12/24 | +0 | 24 Games |
| Uralochka 3.42 dev7 | 9.5/20 | -1 | 20 Games |
| Titan 1.1.0 | 9/20 | -2 | 20 Games |
| Viridithas 16.0.0 | 8.5/20 | -3 | 20 Games |
| Alexandria 7.1.0 | 8.5/20 | -3 | 20 Games |
| Berserk 20241119 | 8/20 | -4 | 20 Games |
| Viridithas 15.0.0 | 7.5/20 | -5 | 20 Games |
| Stormphrax 6.0.0 | 7.5/20 | -5 | 20 Games |
| PlentyChess 4.0.1 | 7/20 | -6 | 20 Games |
| Obsidian 14.23 SE | 6.5/20 | -7 | 20 Games |
| Dragon 3.3 | 6/20 | -8 | 20 Games |
| Fire 10 | 9.5/16 | +3 | 16 Games |
| Lizard 11.1 | 8/16 | +0 | 16 Games |
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