1
Mate or Draw?
White to move. Queen and king already dominate the black king in the corner. One natural-looking move throws the win away — find the only one that ends the game right now.
★★
2
One Move, Two Fates
Black has no legal moves at all: the king is boxed in and the pawn is blocked. Almost any rook move turns the win into a draw. Find the only winning continuation.
★★
3
The Poisoned Pawn
White has a queen against a lone king and pawn. There is a free, very tempting capture — but it throws the win away. Find the move that ends the game at once.
★★