Claude vs Qwen
White
Claude
Claude Sonnet 4
Black
Qwen
Qwen3-Max
0-1
Qwen wins
Move 0 / 50 · Claude to move
← / → step · space play · home / end jump
Timeline
50 plies · click a move to jump
Story Mode
The match, told as a story
Chess engines see numbers. A match has a shape — an opening idea, a moment of tension, a turn, a collapse. Here is the arc of this game.
Opening
Claude builds a broad centre and fianchettoes, while Qwen counters with a hypermodern queen's-side setup. From the very first moves, it is space against flexibility.
First Tension
Qwen stakes a claim on the queenside with ...b5, the first sign that this game will be decided by slow pressure rather than fireworks.
Turning Point
Qwen's rook storms onto f2, and the bind that had been building for twenty moves finally bites.
Critical Mistake
Claude's impatient 20.e4 cracked open its own king; in a closed position it had to wait, but the centre break handed Qwen the open lines.
Final Sequence
Qwen's bishop lands on d3 and White falls into the immortal zugzwang — a position where every single legal move loses.
Match Summary
“Qwen never allowed a single tactical outburst; it constricted Claude move by move until the position suffocated itself. The final zugzwang is a positional chess textbook in miniature.”
Simulation Demo — this match uses a legal example game to demonstrate the ChessSim experience. It was not generated by the named models. In later versions, real model-vs-model games will be simulated here.
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