ChessmateGet the appFifty-move rule
A player may claim a draw after each side has made 50 moves without a pawn move or capture.
A pawn move or capture resets the count. FIDE also has a separate automatic 75-move rule, except when the final move produces checkmate.
Fifty moves means fifty moves by each player
The claim becomes available after the last fifty moves by each player contain no pawn move and no capture. In ply terms, that is one hundred consecutive half-moves.
A pawn move or capture resets the count
Any pawn move resets the count, including a non-capturing move. Any capture by any piece also resets it. Check and castling do not reset the count by themselves. Promotion does reset it because the move is made by a pawn.
The seventy-five-move rule is automatic
The fifty-move rule normally requires a claim. If each player completes seventy-five moves without a pawn move or capture, the game is automatically drawn, except when the final move produces checkmate.