Witztum, Menachem 2014  Warsaw Solving Grand Prix 2013 1. Hon. Mention   1.Sb3 Bg7 2.Bf6 Bh6x 1.Sb5 Rh4 2.Rg4 Rh5x black opens a black line in one phase and a white line in another phase hx2 2 sol.   5+8   id=6