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BetterChess

co.betterchess/betterchess · v1.0.0

Measured by MCP Station

Description written by the publisher, not verified

Chess MCP for Claude: engine analysis, attack maps, game review. One URL, no install.

Connect

claude mcp add --transport http betterchess https://mcp.betterchess.co

{
  "mcpServers": {
    "betterchess": {
      "url": "https://mcp.betterchess.co"
    }
  }
}

Tools as reported by the server

• chess_analyse
  Returns an engine evaluation of a chess position: the strongest candidate moves with their scores, and the position's checkable facts — side to move, whether that side is in check, undefended pieces and the pieces attacking them, and the material balance. Accepts a FEN, a PGN, or a list of SAN moves
• chess_attacks
  Returns the exact list of squares attacked by the piece standing on a given square in a chess position, together with that piece's type and colour. Returns an empty list when the square is unoccupied. Accepts a FEN, a PGN, or a list of SAN moves from the starting position.
• chess_rig
  Returns the JavaScript source of the in-page coaching rig for a chess.com bot game, to be run in that page by the browser's javascript tool. Once running, the page exposes window.__coachWait(ms) (resolves with events and board status), window.__coachWatch.status() (moves, fen, turn, myTurn, result)
• chess_review
  Replays a finished game ply by ply with the engine and returns the moves where the evaluation swung by more than a threshold (default 1.5 pawns). Each entry gives the move number, the side that moved, the move played, the engine's preferred move, the size of the swing in pawns, the evaluation before

Website · JSON · Text for agents · Registry updated 2026-09-01