Aku Chess Engine - UCI chess engine
Author: Hoa T. Vu (Hoavu-cs) Rating Chess Engines Diary CEDR=3181
v.2025.6.29:
Scale display evaluation by a factor 1/2.
Parameter tweaks (late move reduction, RFP, and aspiration window).
Results of NewAku vs OldAku (20+0.2, 1t, 64MB, UHO_Lichess_4852_v1.epd):
Elo: 11.65 +/- 6.28, nElo: 19.33 +/- 10.42
LOS: 99.99 %, DrawRatio: 46.30 %, PairsRatio: 1.23
Games: 4268, Wins: 949, Losses: 806, Draws: 2513, Points: 2205.5 (51.68 %)
Ptnml(0-2): [57, 456, 988, 553, 80], WL/DD Ratio: 0.31
Results of NewAku vs OldAku (20+0.2, 1t, 64MB, UHO_Lichess_4852_v1.epd):
Elo: 9.61 +/- 6.74, nElo: 15.43 +/- 10.80
LOS: 99.74 %, DrawRatio: 43.16 %, PairsRatio: 1.18
Games: 3976, Wins: 890, Losses: 780, Draws: 2306, Points: 2043.0 (51.38 %)
Ptnml(0-2): [62, 456, 858, 534, 78], WL/DD Ratio: 0.30
How strong is the new version of the Aku 2015.6.29 chess engine?
The new version of the Aku 2015.6.29 chess engine has been released recently and has not been tested yet. Its playing strength will be known after the first test tournaments, results will be available on our website soon.
Aku 2025.6.12 vs other engines:
| Emerald 0.3.0 | 2/2 | +2 | 2 games |
| Maelstrom 2.1.0 | 2/2 | +2 | 2 games |
| Freda 1.1 | 2/2 | +2 | 2 games |
| Pzchessbot 2.0 | 2/2 | +2 | 2 games |
| Kraken 2025-06-16 | 2/2 | +2 | 2 games |
| Fridolin 4.00 JA | 2/2 | +2 | 2 games |
| Libra-chess 1.0.1 | 2/2 | +2 | 2 games |
| Ironfang 1.0 | 2/2 | +2 | 2 games |
| Celeris 1.0 | 1/2 | +0 | 2 games |
| Zangdar 4.04 | 0.5/2 | -1 | 2 games |
| Zangdar 4.04 JA | 0.5/2 | -1 | 2 games |
| Halogen 13 | 0.5/2 | -1 | 2 games |
| Stormphrax 7.0.0 | 0/2 | -2 | 2 games |
| Fire 10 | 0/2 | -2 | 2 games |
| PlentyChess 6.0.5 JA | 0/2 | -2 | 2 games |
| Lunar 0.2.1 | 0/2 | -2 | 2 games |
| Fire 9.3 JA | 0/2 | -2 | 2 games |
In which chess program does the Aku 2015.6.29 engine work?
The engine started without problems in the following programs: Fritz 17 and Fritz 20, Aquarium, Arena, Banksia and Lucas chess.
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