a) 1.Qh8? (2.Qa1#),1...Sb5 2.Qc8#,1...Sb7!

1.Qh5? (2.Qa5#),1...Sb7 2.Qb5/Qe2#,1...Sc4 2.Qb5#,1...Sf5 2.Qe2#,1...Bc7!

1.Qe3? (2.Qa3/Qb6#),1...Bc7 2.Qc7#,1...Sc4!

1.Qc1? (2.Qa1/Qc6/Qa3#),1...Sc4 2.Qxc4#,1...Bc7!

1.Ka4? -zz,1...Ba7 2.Rxz7#,1....Bc7!

1.Qh1! (2.Qa1/Qc6#),

1...Bc7 2.Qa8#,1...Sc4 2.Qb7#.

b) 1.Qh8? (2.Qa1#),1...Bc7 2.Qa8#,1...Sb5 2.Qc8#,1...Sb7!

1.Qh1? (2.Qc6#),1...Bc7 2.Qa8#,1...Sc8 2.Qb7#,1...Se4!

1.Qe3? (2.Qa3/Qb6#),1...Bc7 2.Qa7#,1...Sc4!

1.Qf8! -zz,1...Sc8/Se4 2.Qxc8/Qf1#,1...S~ 2.Qc8#,1...Se8/Sb7 2.Qf1#,1...Ba7 2.Rxa7#.   Mates separation.