Stockfish dev-20260625 wins Elite Engines Test, 2026.07.04-08

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Stockfish dev-20260625 won another elite chess engine tournament. Cool Iris 16 took second place, and Pawnocchio 2.0.1 took third (perhaps unexpectedly).

The Stockfish dev-20260625 build looks very successful, we wonder if it should replace Strockfish 18 in the next edition of the Chess Engine League?


CEDR 903.628 games download (01.07.2026)
💾 Tournament download with 612 games
💻 HP ENVY i5-8250U 8GB RAM  🖬 GUI - Fritz 17
#chessenginesdiary Country - Poland, City - Malbork  🕓 Time 3'+3"

P Engine Score (Tie) +/-/=
1: Stockfish dev-20260625 47.5 / 68 1430.75 (+27 -0 =41)
2: Cool Iris 16 44.5 / 68 1344.00 (+21 -0 =47)
3: Pawnocchio 2.0.1 44.0 / 68 1325.75 (+20 -0 =48)
4: Halogen 16.7.2 43.0 / 68 1281.25 (+19 -1 =48)
5: Viridithas 20.0.0 42.5 / 68 1258.25 (+18 -1 =49)
6: Viridithas 20.0.0 JA 42.5 / 68 1240.50 (+19 -2 =47)
7: PlentyChess 8.0.0 41.5 / 68 1268.50 (+15 -0 =53)
8: Triumviratus 5.0 41.5 / 68 1232.50 (+17 -2 =49)
9: Raphael 4.2.0 39.5 / 68 1143.50 (+18 -7 =43)
10: Renegade 1.3.0 JA 38.0 / 68 1114.50 (+13 -5 =50)
11: Heimdall 1.5.0 37.5 / 68 1097.00 (+13 -6 =49)
12: Chess System Tal 2.07 E1019 37.5 / 68 1095.50 (+13 -6 =49)
13: PZChessBot 7.1 37.0 / 68 1089.75 (+11 -5 =52)
14: Rose 1.0.0 26.0 / 68 698.25 (+8 -24 =36)
15: Sapling 1.2.7 22.0 / 68 571.50 (+6 -30 =32)
16: Avalanche 3.0.0 19.0 / 68 471.50 (+5 -35 =28)
17: JustBot 0.2.0 5.5 / 68 50.00 (+3 -60 =5)
18: Prune HCE 4.0.0 3.0 / 68 78.50 (+0 -62 =6)


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