Step 1 of 3
White to move · Checkmate
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Push the king back with king and queen together. Keep your king out of the rook's checks.
Push the king back with king and queen together. Keep your king out of the rook's checks.
The queen beats the rook, but it takes care. Push the defending king to the edge with your king and queen together. The rook wants to stay next to its own king. Once it has to move away, look for a queen check that also attacks the rook. Watch out for rook checks and stalemate tricks.
Every move is checked with an endgame tablebase, which knows the exact result of every position with up to seven pieces. The computer defends perfectly, and if a move throws the result away, the trainer stops and shows you a better one.