Correct answer: Kb31. Kb3! [2. Nc8, Ne8, N:b7, Nf7, Nb5, Nc4, Ne4#] 1. ... Bc6, c6 2. Qe6# 1. ... Bc8 2. N:c8# 1. ... c:d6 2. Q:b7# 1. ... c:b6 2.