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| WHITE TO PLAY & MATE BLACK IN 04 MOVES |
White’s first task is to find the correct mating idea. A brief look should be enough to conclude that all Queen moves prolong the game for more than 04 moves. For instance 1 Qg3 is met by 1 … Rg1 followed by 2 ... a1=Q while 1. Qh4 Rh1 2. Qd8 Rh7 ! is no good either. Also it's hard to see how white can play b6-b7.
So white has one mating idea left, which is Nb4-d5-c7. Let’s see how that works out.
