Stockfish 17.1 vs Mid-range Chess Engines (Tests by Jörn Gronemann, 2025.12.07)

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Another tournament where Stockfish 17.1 "tested" chess engines aspiring to the elite. Reckless 0.9.0-dev, PlentyChess 7.0.29, and Obsidian dev-16.15 SE performed best. The latest engine, Caissa 1.24, performed rather poorly.

CEDR 788.872 games download (01.12.2025)

GPU NVIDIA  RTX 3060 ti. GUI-Banksia, For Every Engine only 1 CPU and 512 Hashtables,  
Book - 4 GM mvs   book,  6TBs.
🕒🕒Time 3'+3"   Tournament download with 630 games 
#chessenginesdiary


P Engine Score (Tie) +/-/=
1: Stockfish 17.1 49.5 / 84 2040.75 (+16 -1 =67)
2: Reckless 0.9.0-dev 46.5 / 84 1919.00 (+11 -2 =71)
3: PlentyChess 7.0.29 45.5 / 84 1890.50 (+9 -2 =73)
4: Obsidian dev-16.15 SE 44.5 / 84 1856.00 (+6 -1 =77)
5: Integral 7.0.0 JA 43.5 / 84 1813.75 (+5 -2 =77)
6: Berserk 20250622 42.5 / 84 1769.50 (+4 -3 =77)
7: Clover 9.1 42.0 / 84 1753.50 (+3 -3 =78)
8: Alexandria 8.1.2 JA 41.5 / 84 1734.50 (+3 -4 =77)
9: Motor 0.9.0 41.0 / 84 1723.00 (+0 -2 =82)
10: RubiChess 2025 40.5 / 84 1705.00 (+5 -8 =71)
11: Horsie 1.1.0 40.0 / 84 1677.50 (+3 -7 =74)
12: Viridithas 18.0.0 39.5 / 84 1649.50 (+2 -7 =75)
13: Stormphrax 7.0.0 JA 39.0 / 84 1632.50 (+2 -8 =74)
14: Caissa 1.24 39.0 / 84 1632.00 (+4 -10 =70)
15: Halogen 15.24.0 35.5 / 84 1491.50 (+1 -14 =69)


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