1...Bb4+
[1...Rxg6
2.Rxe5+
Rg5
3.Rxg5++-
] 2.Ke2!
[2.Kc2?
Kxg6!
3.Rxe5
(3.Ra7
Bxc5=
) 3...Kf6=
] 2...a3
[2...Rxg6
3.Rxe5+
Rg5
4.Bf3+
Kh4
5.Rxg5
Kxg5
6.c6+-
; 2...Kxg6
3.c6+-
] 3.Nxe5
Re3+!!
4.Kxe3
Bxc5+
5.Kd2!
switchback 5...a2
6.Bf3+!
[logical try 6.Rh7+?
Kg5
7.Rg7+
Kf4!
8.Ng6+
Kg3!
(Not 8...Kg4?
9.Bf3+
Kg3
10.Nh4+
Kxh4
11.Rh7+
Kg5
12.Rh1
Bd4
13.c5+-
) 9.Nh4+
(9.d4!?
a1Q!
(Not 9...Kh2?
10.dxc5
a1Q
11.Rh7+
Kg3
12.Bd5+-
; Not 9...Bb4+?
10.Ke3
a1Q
11.Ne5+
Kh3
12.Bg2+
Kh4
13.Rg4+
Kh5
14.Bf3
Qe1+
15.Kf4
Bd2+
16.Kf5
Qb1+
17.Kf6
Qb6+
18.Nc6+-
) 10.Ne5+
Kh2!
11.Nf3+
Kxh1
12.Rg1+
Qxg1
13.Nxg1
Bxd4=
) 9...Kxh4
10.Rh7+
*(thematic: Here wB on h1) 10...Kg5
(g3) and impossible 11.Rh1, because blocked h1] 6...Kg5
7.Rg7+
Kf4
[or 7...Kf5
8.Be4+
Kxe5
9.Rg5+
Ke6
(9...Kf4
10.Rf5+
Kg4
11.Rf1+-
) 10.Rg6+
Ke5
11.Ra6+-
] 8.Ng6+
Kg3!
9.Nh4+
Kxh4
10.Rh7+
*(, here wB on f3) 10...Kg5
11.Rh1
it's possible, because is not blacked h1 as in thematic try 11...Bd4
12.c5!
a1Q
13.Rxa1
Bxa1
14.Ke3!
switchback 14...Kf5
15.d4!+-