mcp-chess 0.1.9

MCP server for playing chess against AI

MCP Chess Server

This MCP let's you play chess against any LLM.

Installation

To use this chess server, add the following configuration to your MCP config:

{
  "mcpServers": {
    "chess": {
      "command": "uvx",
      "args": [
        "mcp-chess"
      ]
    }
  }
}

Usage

Play a game:

Find a position in a PGN for game analysis:

Available Tools

The server provides the following tools:

• get_board_visualization(): Provides the current state of the chessboard as an image. The board orientation automatically flips based on the user's assigned color.
• get_turn(): Indicates whose turn it is ('white' or 'black').
• get_valid_moves(): Lists all legal moves for the current player in UCI notation (e.g., 'e2e4', 'g1f3'). Returns an empty list if the game is over.
• make_move(move_san: str): Makes a move on the board using Standard Algebraic Notation (SAN) (e.g., 'e4', 'Nf3', 'Bxe5'). Returns the move in SAN and UCI, the new board FEN, and game status.
• new_game(user_plays_white: bool = True): Starts a new game, resetting the board. By default, the user plays white. Sets the user's color for board orientation. Returns a confirmation message.
• find_position_in_pgn(pgn_string: str, condition: str): Finds the first board position in a PGN string matching a condition (e.g., "bishop on a3") and returns an image of that board state. The condition format is "piece_type on square_name". Valid piece types are "pawn", "knight", "bishop", "rook", "queen", "king".