Chess Engines Diary

Check out this incredible showdown between two powerful chess engines, YuliGM Pro 20 and Cool Iris 15 , both built on the legendary Stockfish code. Witness how White orchestrated a brilliant attack and secured victory!

Game: Pawnocchio 1.9.2 vs Fire 10 (1-0) Watch Pawnocchio in action! This newcomer is making waves, jumping from 4th to 2nd in the CEDR Chess Engine League in only two seasons. A true rising star.

  Game: Reckless 0.9.0 vs ShashChess 40 (1-0) This is another game in which the Reckless chess engine demonstrates that it can beat Stockfisk or any of its numerous clones. We hope you enjoy the game.

  Game:  Alexandria 9.0.0 vs JA Stockfish 18 JA (1-0) For a long time, Stockfish seemed untouchable, but those days are over. Other engines are catching up, and Stockfish is losing ground more often than ever. Check out this game where Alexandria 9.0.0 JA defeats Stockfish 18 JA!

  Interesing g ame: Artemis 27TR PrO vs Stockfish 18 (1-0), Chess Engines Diary Test, Temp: 3'+3".

Game PZChessBot 6.1 vs Stash 37.10 JA.  This game is a must-watch! PZChessBot 6.1 has just won the TOP-64 Chess Engine League qualifiers and earned its spot in League 4 for the upcoming March 2026 season.

We’ve seen the giants, now let’s look at the underdogs. It’s time to see how these slightly weaker engines play and what they’re truly capable of. Game: SoloEngine 1.3.1 vs. Caligula 5.0 (0-1), Time Control: 3'+3"

  Description of this chess game according to AI This game is a fascinating study in "squeezing water from a stone." Halogen 15.33.3 demonstrated a masterclass in exploiting structural passivity, eventually breaking down Fritz 20 in a marathon 102-move battle. Here is the analytical breakdown of the match: 1. The Opening: The Berlin Wall (C67) The game followed a very solid, symmetrical line of the Ruy Lopez. The move 5. Re1 (instead of the main-line 5. d4 ) is a strategic choice often used by engines to reach a controlled, low-variance position where they can outmaneuver the opponent in the long run. Key Transition: After the mass trades around move 18 ( 18. Bxd6 ), Black was left with doubled d-pawns. While objectively a draw, this gave White a clear, singular target to play against for the next 80 moves. 2. The Midgame: Strategic Tension Halogen played with a high degree of "engine aggression"—not attacking the King directly, but clamping down on space. The A...