Correct answer: c:b31...b4 2.Nc4#[A] 1...e:f3 2.N:d3#[Б] 1...d:e3 2.Bc3#[C] 1.c:d3? zz 1...b4 2.Nc4#[A] 1...e:d3 2.N:d3#[Б] 1...d:e3 2.Bc3#[C] but 1...e:f3! 1.c3? (2.c:d4#/e:d4#