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Stockfish 17.1 examines challenger engines (Tests by Jörn Gronemann, 2025.06.04)

Stockfish 17.1 tested the best engines aspiring elite. Obsidian dev-16.04 and Integral 7.0.0-dev came out on top. It seems like they might match Stockfish's strength within the year.

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 468 games 
💾 All games CEDR 664.406 games download (01.06.2025)  
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P Engine Score (Tie) +/-/=
1: Stockfish 17.1 43.0 / 72 1516.75 (+14 -0 =58)
2: Obsidian dev-16.04 41.0 / 72 1440.00 (+11 -1 =60)
3: Integral 7.0.0-dev 40.0 / 72 1416.25 (+9 -1 =62)
4: Alexandria 8.0.0 JA 37.5 / 72 1334.50 (+6 -3 =63)
5: PlentyChess 5.0.21 37.0 / 72 1320.00 (+4 -2 =66)
6: Caissa 1.22 36.5 / 72 1300.25 (+4 -3 =65)
7: Berserk 20250307b JA 35.5 / 72 1264.75 (+3 -4 =65)
8: RubiChess 20250520 34.5 / 72 1242.75 (+3 -6 =63)
9: Fritz 20 34.5 / 72 1236.75 (+3 -6 =63)
10: Horsie 1.1.0 34.0 / 72 1214.00 (+4 -8 =60)
11: Starzix 6.1 6.1 JA 32.5 / 72 1161.00 (+2 -9 =61)
12: Motor 0.8.0 JA 31.0 / 72 1120.50 (+0 -10 =62)
13: Clover 8.1.16 31.0 / 72 1116.00 (+1 -11 =60)


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