What Is the 50-Move Rule in Chess?
The 50-move rule is one of chess's draw rules. If 50 consecutive moves pass without a pawn being moved or a piece being captured, either player can claim a draw. It exists to prevent games from going on indefinitely in positions where no progress is being made.
How it works
The count starts at zero. Every time a player makes a move that is NOT a pawn move and NOT a capture, the count increases by one. When either player reaches 50 on the count (meaning 50 moves by each player without a pawn move or capture), the player whose turn it is may claim a draw.
Important: the claim is not automatic. You must ask for the draw. If you make a move instead, the count continues (or resets if you moved a pawn or captured).
When the count resets
The 50-move count resets to zero whenever: a pawn is moved (any pawn, any direction), or any piece is captured. After the reset, the 50-move count starts again from zero.
In online chess
On online platforms, the 50-move rule is usually enforced automatically. Most servers will offer or force a draw when the count reaches 50. Some platforms use 75 moves (the FIDE "automatic draw" threshold) instead.
Historical exceptions
Until 1992, FIDE allowed exceptions for certain endgames that were known to require more than 50 moves to win (e.g., KRB vs KN). These exceptions were removed, and the rule now applies universally.