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The King is threatened by the Rook here, and has no moves. By looking carefully you will see that 3 possible squares are covered by his own pawns, and the Rook covers the other squares. He is therefore checkmated. |
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The white Queen is defended by the King, and covers all escape squares of the Black King, so it is checkmate. |
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The black King is in check by the Bishop and all his escape squares are covered (shown by the arrows). |