what is 50 move rule in chess

The 50-move rule in chess says that a player can claim a draw if the last 50 moves by each side include no pawn moves and no captures. It is designed to stop games from going on forever in positions where neither side is making real progress.

Quick scoop

• It is not automatic at 50 moves in over-the-board chess; the player must claim the draw.

• If the count reaches 75 moves with no pawn move or capture, the game is automatically drawn under modern rules, unless the final move delivers checkmate.

• The rule resets whenever a pawn moves or a piece is captured.

Simple example

If both players shuffle pieces around for 50 full moves without moving a pawn or taking anything, the side to move can say, “I claim a draw,” and the game ends that way if the claim is valid.

Stalemate vs. 50-move rule

• Stalemate : no legal moves and not in check, so the game ends immediately.
• 50-move rule : there may still be legal moves, but the game can be drawn because of long inactivity in terms of pawns and captures.

If you want, I can also explain the rule with a tiny chessboard example.