Test your chess: Reitstein problem 110

White to play and win

D Friedgood v A Haller 1970

Solution

Consider all biffs leads to 1 Ng5+!, when if the knight is captured, the best move is 2 Be5+ winning the house. Also, 1…Kg8 lets the queen in with check, 2 Qe6+, and mate follows, so 1…Kg7[] 2 Ne6+ Kg8[] 3 Qg4!, a slow move but one which overwhelms black.

3…Qe8 is forced, to defend g6, when 4 Nc7 Qf7[] (again, to defend g6) 5 Be5 1-0.

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