Step 1 of 3
White to move · Mate in 1
Check along the back rank with your other rook.
Check along the back rank with your other rook.
Two rooks can mate without help from the king. One rook cuts the king off along a rank, the other checks on the next rank, and they take turns pushing the king back until it reaches the edge. If the enemy king gets close to one of your rooks, move that rook to the far side of the board.
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.