Correct answer: Qf81. Qf8! waiting 1. ... Kc5 2. B:e7# 1. ... Ka5 2. Bc3# 1. ... Ka7 2. Bd4# 1. ... Kc7 2. Be5# 1. ... Nc8/g8/c6/:g6/d5/f5 2. Bd8#
