Daily chess puzzle: Check Mate #219

Another puzzle from Dragoslav Andric’s 1981 book “Matni Udar”.

Black to play and mate White

Gligoric v Olafsson, F, Portoroz Interzonal 1958

Solution

An unusual motif: Black breaks the pin on his LPDO Rd5 by 1…Qc6!, exploiting White’s back rank mate weakness and LPDO Qc4.

After 2 Qf1 Qc2 White resigned.

FEN