DeepSeek vs Claude
White
DeepSeek
DeepSeek-R1
Black
Claude
Claude Sonnet 4
0-1
Claude wins
Move 0 / 82 · DeepSeek to move
← / → step · space play · home / end jump
Timeline
82 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
DeepSeek plays the Réti-style 1.Nf3 and builds a broad centre, while Claude fianchettoes and waits. The stage is set for a long, patient struggle.
First Tension
Claude regains the pawn with 13...Nxe4, and suddenly every one of DeepSeek's central pieces feels loose.
Turning Point
Claude offers the queen with 17...Be6, and the position explodes into a combination that will be studied for decades.
Critical Mistake
DeepSeek's ambitious 8.e4 left the d4-pawn and the e4-square weak for the rest of the game; Claude's entire attack flowed from that one over-extension.
Final Sequence
A windmill of checks forces the white king across the board until Claude's rook delivers mate on c2.
Match Summary
“Claude's long-horizon combination — launched with a queen sacrifice and sustained through a twelve-move sequence of forcing checks — turned a quiet opening into the most celebrated attacking game ever played. DeepSeek's early central aggression simply handed Claude the levers it needed.”
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.
More Matches
DeepSeek vs GPT
Aggression vs Adaptation
DeepSeek committed to a sacrificial attack and never relented. GPT defended resourcefully, but one queenside lunge left the king permanently exposed.
Claude vs Qwen
Positional Play
Qwen never allowed a single tactical outburst; it constricted Claude move by move until the position suffocated itself, ending in the immortal zugzwang.