It is white turn to move. What is the least number of moves for white to checkmate the black king. Assume optimal play for both sides. If force mate is not possible give your answer as
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The first move for white is N e 7 + . Black replies with K h 8 (the only move). White plays Q x h 7 + . Black replies K x h 7 (the only move). Then white plays R h 1 # for the mate. This is called the Annastasia's mate.