Chess

Browser Controls

• Select: Left-click or tap on the piece you want to move. Valid destination squares will highlight automatically.
• Move: Click or tap on a highlighted square to place your piece.
• Deselect: Click anywhere outside the valid squares to cancel your selection.

Special Rules

• Difficulty Levels: In single-player, choose from three AI difficulty levels — Beginner, Advanced, or Expert — to match your skill.
• Castling: Move your King two squares toward a Rook, and the Rook jumps over the King. Only valid if neither piece has moved yet and the path is clear.
• Pawn Promotion: If your pawn reaches the opposite end of the board, it can be instantly upgraded to any piece (usually a Queen).
• En Passant: A special pawn capture that can occur immediately after an opponent moves a pawn two squares forward from its starting position.
• Checkmate & Stalemate: Win by delivering Checkmate — the enemy King is in check with no legal escape. If a player has no legal move but is NOT in check, the game is a draw by Stalemate.

Piece Movement Guide

• King: Moves exactly one square in any direction (horizontally, vertically, or diagonally).
• Queen: The most powerful piece. Moves any number of vacant squares in any direction.
• Rook: Moves any number of vacant squares horizontally or vertically.
• Bishop: Moves any number of vacant squares diagonally.
• Knight: Moves in an “L” shape (two squares one way, then one perpendicular). The only piece that can jump over others.
• Pawn: Moves forward one square at a time, but captures diagonally. On its first move it may advance two squares.