Black to play and win
E de Schrijver v LR Reitstein, correspondence 1968
The solution played in the game was 1…g5! the idea being to open the h file by doubling white’s pawns. Then h1 is no shelter for the king. 2 Bg3 Ng3 3 hg Rf2 4 Rf2 Bf2+! 5 Kf2 Qe3+
6 Kf1 Rf8+ etc, 0-1.
Nice: perhaps shows the difference between correspondence and OTB, since g5! carries some ‘risk’, or at least requires more confident calculation.