Alexandria 9.1.0 JA - new version chess engine
Alexandria - what's new?
LTC Progression test
Elo | 18.29 +- 4.31 (95%)
Conf | 60.0+0.60s Threads=1 Hash=64MB
Games | N: 5000 W: 1478 L: 1215 D: 2307
Penta | [0, 376, 1488, 633, 3]
Progression test was run on the Pohl.pgn book.
Search Changes
Expanded conthist to 6 plies
Increased futility pruning max depth
Fail questionable RFP
QS SEE pruning
Added pawnhist
Scale asp win delta with previous scores and decreased the base value
Removed depth guard from razoring
SPSA tuned search values
Eval Changes
New net with piececount filtering, dual activation, more data and better WDL scheduling.
Added a permuting step to maximize sparsity for NNZ
Faster inference thanks to improved finny tables handling (thanks to @cj5716)
Misc changes
Added FRC support! Tested for a few thousand games and it should run fine,
Improved TM with score stability scaling
| Stockfish 17.1 | 19/39 | -1 | 39 Games |
| PlentyChess 6.0.5 JA | 14/28 | +0 | 28 Games |
| Berserk 20250307b | 12/22 | +2 | 22 Games |
| Dragon 3.3 | 10.5/22 | -1 | 22 Games |
| Berserk 20250606 | 9.5/20 | -1 | 20 Games |
| Yuliana 7.0 | 9.5/20 | -1 | 20 Games |
| RubiChess 20250606 JA | 9/18 | +0 | 18 Games |
| Cool Iris 14 | 8/18 | -2 | 18 Games |
| Lc0 0.31.2 | 8/14 | +2 | 14 Games |
| Kookaburra 3.10 | 7/14 | +0 | 14 Games |
| Cool Iris v19 | 7/14 | +0 | 14 Games |
| DarkSeid 6.2 EE | 6/14 | -2 | 14 Games |
| Obsidian dev-16.14 | 6.5/13 | +0 | 13 Games |
| CalvinChess 6.0.0 JA | 9/12 | +6 | 12 Games |
| Stormphrax 6.0.0 | 7/12 | +2 | 12 Games |
| Booot 7.4 | 6/12 | +0 | 12 Games |
| Green Way | 5.5/12 | -1 | 12 Games |
| Contact 12 | 5/12 | -2 | 12 Games |
| Mayhem 8.8 JA | 10/10 | +10 | 10 Games |
| Uralochka 3.42 dev13 | 7/10 | +4 | 10 Games |
| Pawnocchio 1.7.2 | 7/10 | +4 | 10 Games |
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