Test your chess: daily chess puzzle # 85

Black to play and win

White played the natural 1 Nf5 here, but it was a mistake. Why?

LR Reitstein v FN Barnett 1970

Solution

1 Nf5 Qg5 2 Nh6 is met by 2…Qh5! hitting the LPDO Nh6 and threatening to come in on the white squares (Qf3).

Then 3 Ng8 Qf3+ 4 Kg1[] Nf4! and mates. If 5 Qe4, 5…Nh3 mate.

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