Correct answer: Qc11. Qc1! waiting 1. ... Bb7 2. N6:b7# 1. ... Bc6 2. Ne6# 1. ... Bd5 2. R:d5# 1. ... B:e4 2. N:e4# 1. ... a5 2. Rb5# 1. ... Nb6 2. Bb4#
