Loading ChessSim
AI chess simulation & storytelling
Watch intelligence play.
One board. Two sides. Every important move becomes part of the story.
Follow the conflict move by move. The board shows what happened, Stockfish explains the position and the story reveals why it matters.
逐步阅读棋局冲突：棋盘呈现事实，引擎给出有限条件下的判断，故事解释关键变化为什么重要。
Featured Story
White committed to a sacrificial attack and never relented. Black defended resourcefully, but one queenside lunge left the king permanently exposed.
Starting position
White
Example PGN
Black
Human-edited story
The Queen Was Bait
White committed to a sacrificial attack and never relented. Black defended resourcefully, but one queenside lunge left the king permanently exposed.
Demo Story — a legal example PGN with human-edited narrative. No named-model match is claimed.
What is ChessSim?
ChessSim is a chess simulation and narrative platform that combines legal games, bounded engine analysis, readable commentary and clear provenance. Beginners can follow the drama in Story mode; experienced players can open Analysis mode for the engine detail.
Run a complete legal game between selected agents.
Use Stockfish for bounded evaluation and tactical signals.
Turn the meaningful changes into concise story moments.
Keep the board, chapters and analysis synchronized.
Latest Stories
Every Move Makes the Room Smaller
Positional Play
Every Move Makes the Room Smaller
Black never allowed a single tactical outburst; it constricted White move by move until the position suffocated itself, ending in the immortal zugzwang.
The Queen Walks Into the Trap
Long-horizon Strategy
The Queen Walks Into the Trap
Black's long-horizon combination — launched with a queen sacrifice and sustained through a windmill of checks — turned a quiet opening into one of the most celebrated attacks ever played.
Experiments · Chess960
Generate any of 960 legal starting positions, then carry the same simulation, Stockfish analysis and narrative replay into unfamiliar territory.
Explore the experiment →Clear Provenance
Every match states how the game was generated, who the listed players are, how Stockfish was used and whether the narrative is editorial or live-generated.
每盘棋都会说明棋谱来源、叙事来源、验证状态，以及是否发生替代走子。
How ChessSim labels matches · 查看来源说明 →A curated legal game. Named models are illustrative.
The named agents produced the recorded game.
A live game with any substitutions disclosed.
FAQ
ChessSim is an AI chess simulation and storytelling platform. It keeps the board, Stockfish analysis and a move-by-move narrative in one synchronized experience.
Yes. Every replay follows a legal game and preserves its positions and moves. Each page also states whether it is a curated Demo Story, a Verified AI Match or a Live Fallback Match.
Stockfish analyzes positions in the visitor's browser. Its evaluation, best move and tactical signals are shown as engine analysis; the narrative does not override them.
No. Curated Demo Stories use legal example games and do not claim that the named models played them. Live Arena games disclose when a local fallback replaces a selected model.
A match is labelled Verified AI Match only when the recorded game was played by the named agents without an undisclosed substitution.
ChessSim turns selected moments into chapters using the legal move record, position changes and engine signals. Routine moves stay concise so the decisive moments carry the story.
Yes. The Chess960 experiment generates all 960 legal starting positions and preserves the variant's castling rules through simulation, replay and PGN export.