Learns threefold repetition, the 50-move rule and insufficient material.
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What's in this lesson?
Learns threefold repetition, the 50-move rule and insufficient material.
A game doesn't always end in mate. The first way to draw is insufficient material: if there aren't enough pieces left to mate, the game is a draw. King and bishop alone cannot mate a king.
King and knight alone can't mate either. But king and rook, king and queen, or two bishops are enough to mate.
The second way is threefold repetition: if the same position occurs three times, the game is a draw. A player who is behind sometimes saves a draw this way by checking the king again and again; this is called perpetual check.
The third way is the fifty-move rule: if neither side captures a piece or moves a pawn for fifty moves, the game is a draw. Finally, the players can also agree to a draw.