1.Ne6+!
1.Qf4? e1=N+! 2.Kg3 (2.Ke2? c1=Q -+ ; 2.Ke4? Rb4+ -+-)
2…Be5! 3.Qxe5 and, eg, 3…c1=Q =
1…Bxe6
2.Qxe6
2.Qxc3? Rb3 -+
2…e1=N+!
3.Kg3!
3.Ke4? (3.Kf2/4? c1=Q+ -+) 3…Rb4+ 4.Kd5 (4.Kf5? Rf4+! 5.Kg6 Rf6+ -+) 4…
Rd4+ 5.Kc6 Rxd6+ 6.Qxd6+ and White cannot make any progress, eg 6…Kf7 7.
Qf4+ Kg7 8.Qg5+ Kf8 9.Qc5+ Kf7 10.Qxc3 Nd3 =.
A) 3…Be5+
4.Kh3!
4.Qxe5? Rb3+ -+
4…Rb3+!
5.Qxb3 Bxd6
6.Qc4
(6.Qc3 Kf7 7.Qc4+ [7.Qxe1? Bf4=] 7…Ke7 etc. as below, extending solution by one move)
6.Qb2? Be5! (not 7…Bf4? 8.Qf6+ and 9.Qxf4+-) 7.Qb4+ Kf7 8.Qxe1 Bf4 =
6.Qe3? Nd3 =
6…Ke7
6 …Ba3 7.Qf4+ Ke7 8.Qe3+ and 9.Qxa3 +-
6 …Be5 7.Qf1+ and 8.Qxe1 +-
7.Qe2+!
7.Qc3(?) Kf7 8.Qc4+ is a loss of time.
7.Qc6? Bb4 =
7.Qc8? Bf4 =
7.Qe4+? Kd7 8.Qa4+ Ke6 =
7… Kd7
7…Kf7 8.Qf2+! (8.Qxe1? Bf4!=) 8…Kg8 9.Qxe1 Bf4 and, eg, 10.Qe6+ Kg7
11.Qd7+ Kg6 12.Qc6+ +-
8.Qd2!
8.Qb5+? Ke6 9.Qe2 Kd5 10.Qxe1 Kc4! (10…Bf4? 11.Qa5+ Kc4 12.Qxf4 +-)
11.Qe6+ Kc3=
8.Qxe1? Bf4 ! = (and not 8…Bb4? 9.Qc1 +-)
Now, the pinned Bishop cannot help.
8…Sd3
9.Qxc2 Sf4+
10.Kh2! +-
10.Kg3(?) Nd3+ 11.Kh3 Nf4+ 12.Kh2 is a loss of time.
Black cannot exploit the battery : after 10…Nd3+ or 10…Nd5+ 11.Kg(h)1
and White wins.
B) 3…Rb7
4.Qc8+!
4.Qh6+? Rg7+! (4…Bg7? 5.Qf4+ +-) 5.Kh3 Nd3 -+
4…Ke7
5.Sf5+!
5.Qxb7+? (5.Qxc3? Rb3!) 5…Kxd6 6.Qb6+ Kd5! (6…Ke5? 7.Qe3+ +- ;
6…Kd7 ? 7.Qb5+ +-) 7.Qb3+ Kd4 =
5…Kf6
6.Qxc3+
6.Qh8+? Kxf5 =
6…Kxf5
7.Qxe1
7.Qa5+? Ke4 8.Qxe1+ Kd3! =
7…Rb1
7…Rc7 8.Qa5+ +-
8.Qf2+
8.Qa5+? Ke4=
8…Kg6
9.Qxc2 +-