1.Qc5+ (1.Qe3+ {?} 1...Ka8 2.Nc6 Bxc6 {=})

1...Ka8 (1...Kb7 2.Qb6+ {+_})

2.Kb6 (2.Nc6 {?} 2...Bxc6 3.Kb6 Qd8+ {=})

a) 2...Qa4

3.Nc6 Qb3+ (3...Bc8  4.Kc7 Qa6 5.Na5 Bh3 6.Qf8+ {+-})

4.Nb4 (4.Kc7 {?} 4...Qb7+ 5.Kd6 Bc8 {=})

4...Qa4 {unpin}

5.Kc7 Qb5

6.Qxb5 Bxb5

7.d6 Be8

8.Nc6 {zz+-} +-

b)2...Qf6+

3.Kc7!

(3.Nc6 {? selfpin position 1} 3...Qb2+ 4.Kc7 Qb7+ 5.Kd6 Bc8

 6.Qa5+ Qa6 {selfpin-pin} 7.Qb4 {unpin} 7...Qb7 {unpin position draw=}  7. ..Bb7? 8.Kc7! unpin +- )

3...Qe5+

 4.Kd8 (4.Kxd7 {?} 4...Qc7+ 5.Kxc7 {stalemate=}) 4...Qb8+

5.Nc8 {selfpin position 1a} 5...Bxc8 (5...Bb5 6.d6 {+-})

6.Qxc8 {selfpin-pin+-})