Correct answer: Qg1 1. Bc4 [A] ? waiting 1. ... R:b2 2. Qg1 [C] # But 1. ... a:b2 [a] ! 1. Ba6 [Б] ? waiting 1. ... a:b2 2. Qg1 [C] # But 1. ... R:b2 /[б]/ ! 1. Qg1