1.Qh2? – Zz, 1...Kh6 (a) 2.Sf5#, 1...g4 (b) 2.Sf3#, 1...Kg4! (c), 

1.Qf6? – Zz, 1...g4 (b) 2.Sf4#, 1...Kg4 (c) 2.Qf3#, 1...Kh6! (a), 

1.Bg8! – Zz, 1...Kg4 (c) 2.Qe2#, 1...Kh6 (a) 2.Qh8#.