Test your chess: Reitstein problem 120

White to play and win

P Kroon v K Dreyer 1967

Solution

Fairly simple today: 1 Ng6 and the zwischenschach 2 Nf8+ ensures white wins a piece. It was one of the biffs I saw instantly, but in fact Reitstein's rubric made me think there might be something even more special: 'after Kroon played his next move in this position Dreyer tried on vain for nearly half an hour to find a satisfactory reply. What was White's decisive move?'

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