Rating Chess Engines Diary CEDR=3499, Author - Peter Osterlund
Texel 1.13a4 JA, rebuilt by Jim Ablett, is a highly intriguing and powerful chess engine. The previous version achieved a CEDR rating of 3499, ranking 53rd. Testing of the new version begins today, and it promises to be exciting.
v.1.12:
2025-01-05: Texel 1.12 (ELO: +85)
Neural network improvements:
Speed up matrix multiplication for AVX-512.
New network based on new training data.
Use 4 "heads" (all NN layers except the first) for evaluation. The active head depends on the number of pieces on the board.
Increase NN layer 1 output size from 256 to 384.
Tablebases:
Measure thinking time more accurately. Useful when TB files are on mechanical disks.
Better handling of DTZ scores in search.
Avoid expensive (wrong side to move) DTZ probes in search.
Add UCI parameter to control required search depth for DTZ probes.
Measure time required to perform a TB probe instead of guessing. This avoids time losses in fast games when TB files are on mechanical disks.
Allow RTB WDL probes in some cases even if hmc > 0.
Change TB swindle depth from 16 to "15+minProbeDepth", to avoid slowdown in late middlegame/early endgame when TB files are on mechanical disks.
Search:
Implement the counter move heuristic.
Implement multi-cut pruning based on singular search score.
Adjust singular extension search parameters.
Allow both extension and reduction in the same search node.
Remove no longer useful "recapture" and "going into pawn endgame" extensions.
Reduce aspiration window size.
Other:
Use multiple threads to initialize the transposition table.
Better handling of mate scores in the transposition table.
Fix handling of empty strings in UCI string options.
Texel 1.12 vs other engines:
| Fire 10 | 7.5/16 | -1 | 16 Games |
| Arasan 25.0 | 7.5/14 | +1 | 14 Games |
| Equisetum 1.15 JA | 7/14 | +0 | 14 Games |
| Uralochka 3.42 dev7 | 5/12 | -2 | 12 Games |
| Sting Black Hole 8 | 9.5/10 | +9 | 10 Games |
| Lizard 11.1.5 JA | 7.5/10 | +5 | 10 Games |
| Patricia 4.0 | 6.5/10 | +3 | 10 Games |
| Halogen 12.12.3 JA | 4.5/10 | -1 | 10 Games |
| Revenge 4.0 | 3.5/10 | -3 | 10 Games |
| Turbulence v4 0.0.4 | 8/8 | +8 | 8 Games |
| Critter 1.6a | 7/8 | +6 | 8 Games |
| Pingu 5.0.0 | 7/8 | +6 | 8 Games |
| Carp 3.0.1 | 5/8 | +2 | 8 Games |
| Pawn 3.0 JA | 4.5/8 | +1 | 8 Games |
| Toad 3.0.0 | 6/6 | +6 | 6 Games |
| EveAnn 2.2 | 6/6 | +6 | 6 Games |
| Lynx 1.8.0 | 4.5/6 | +3 | 6 Games |
| Schoenemann 0.4.0 | 4.5/6 | +3 | 6 Games |
| Marvin 6.3.0 | 4.5/6 | +3 | 6 Games |
| Rice 8.0.0 | 4/6 | +2 | 6 Games |
| Slowchess 2.9 | 3/6 | +0 | 6 Games |
Jim Ablett compiles:
Texel 1.13a4 JA download
All files (games, tables and engines) - download from page
All files (games, tables and engines) - download from page
Comments
Post a Comment