Correct answer: Rc2+1...Ka7 2.c6# 1.Rg1+?? 1...Ka7 2.c6# 1...Kc8 2.e8Q#/e8R#/Rg8# but 1...d5! 1.R2g3+?? 1...Ka7 2.c6# 1...Kc8 2.e8Q#/e8R