Pawnocchio - UCI chess engine
Author: Jonathan Hallstrom Rating Chess Engines Diary CEDR=3697
Author: Jonathan Hallstrom Rating Chess Engines Diary CEDR=3697
Big news for chess engine fans!
Pawnocchio has been on fire lately. The pre-release version dominated the 2nd Chess Engine League and earned promotion to the prestigious 1st League (TOP-16).Now it’s time for Pawnocchio 2.0.1 — let’s see what it can achieve!
Pawnocchio 2.0 what's new?
Elo | 110.29 +- 4.75 (95%)
Conf | 40.0+0.40s Threads=4 Hash=256MB
Games | N: 3760 W: 1499 L: 344 D: 1917
Penta | [1, 53, 617, 1208, 1]
https://furybench.com/test/6704/
Elo | 111.33 +- 3.58 (95%)
Conf | 40.0+0.40s Threads=1 Hash=64MB
Games | N: 6996 W: 2807 L: 639 D: 3550
Penta | [3, 110, 1118, 2250, 17]
https://furybench.com/test/6699/
Elo | 103.48 +- 3.21 (95%)
Conf | 10.0+0.10s Threads=1 Hash=16MB
Games | N: 10116 W: 3984 L: 1057 D: 5075
Penta | [6, 233, 1728, 3010, 81]
https://furybench.com/test/6697/
Most of the gain is from large improvements to the network on all fronts.
The network now has several hidden layers, and a much more expressive set of inputs, now including threat inputs as well as pawn-pawn inputs (my own invention). The network is fully quantised, in the vein of Stormphrax
Also various search changes, but the majority of the elo is improvements to the network.
v.2.0.1:
windows and fastchess compatibility fixes
Pawnocchio 1.8.1 vs other engines:
| Astra 6.1.1 | 30/62 | -2 | 62 games |
| Caissa 1.23 | 14.5/36 | -7 | 36 games |
| Critter 1.6a | 33/34 | +32 | 34 games |
| YuliGM Pro 20 | 13.5/34 | -7 | 34 games |
| Artemis 17.3TR sl | 10.5/30 | -9 | 30 games |
| ShashChess 39 | 10.5/29 | -8 | 29 games |
| Fire 10 mingw | 18.5/28 | +9 | 28 games |
| Stockfish 17.1 | 8/27 | -11 | 27 games |
| Laser 1.8 beta JA | 23.5/26 | +21 | 26 games |
| HypnoS ++ 1.03 | 10/24 | -4 | 24 games |
| SF-POLY 200825 | 9/24 | -6 | 24 games |
| Potential 2.0.0 JA | 23/23 | +23 | 23 games |
| Alexandria 8.1.2 | 7.5/23 | -8 | 23 games |
| Patricia 5.0 | 17.5/22 | +13 | 22 games |
| Frozenight 7.0.0 JA | 18.5/20 | +17 | 20 games |
| SF-PRO2 02.05.2025 | 8.5/20 | -3 | 20 games |
| Tactical Titan v2 | 7.5/20 | -5 | 20 games |
| Stockfish dev-20250724 | 8/19 | -3 | 19 games |
| Alexander 6.0 | 16/16 | +16 | 16 games |
| Stash 37.10 JA | 14.5/16 | +13 | 16 games |
| MrBob 1.3.0 JA | 14/16 | +12 | 16 games |
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