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Stockfish 17.1 vs Mid-range Chess Engines (Tests by Jörn Gronemann, 2025.10.12)


A major tournament saw Stockfish 17.1 putting mid-range chess engines to the test. PlentyChess 7.0.0 JA emerged as the top performer, with Alexandria 8.1.2 JA also doing quite well. Interestingly, the latest Reckless build performed worse than its previous version, 0.8.0.

 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 1050 games 
💾 All games CEDR 760.349 games download (01.10.2025)  
#chessenginesdiary

P Engine Score (Tie) +/-/=
1: Stockfish 17.1 78.5 / 140 5425.25 (+18 -1 =121)
2: PlentyChess 7.0.0 JA 77.0 / 140 5322.75 (+14 -0 =126)
3: Alexandria 8.1.2 JA 77.0 / 140 5322.00 (+17 -3 =120)
4: Obsidian dev-16.15 SE 75.5 / 140 5231.75 (+11 -0 =129)
5: Reckless 0.8.0 75.0 / 140 5179.25 (+15 -5 =120)
6: Reckless 0.9.0 dev-162f5682 73.0 / 140 5082.75 (+6 -0 =134)
7: Integral 7.0.0-dev JA 72.0 / 140 4989.50 (+10 -6 =124)
8: Berserk 20250622 69.5 / 140 4837.00 (+6 -7 =127)
9: Clover 9.1 JA 68.0 / 140 4750.25 (+5 -9 =126)
10: Caissa 1.23 65.0 / 140 4545.75 (+3 -13 =124)
11: Viridithas 18.0.0 64.5 / 140 4521.00 (+2 -13 =125)
12: Horsie 1.1.0 64.5 / 140 4514.50 (+5 -16 =119)
13: Stormphrax 7.0.0 JA 64.0 / 140 4464.75 (+5 -17 =118)
14: Motor 0.9.0 63.5 / 140 4438.00 (+3 -16 =121)
15: Halogen 15.8.0 63.0 / 140 4420.00 (+2 -16 =122)



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