1.Bf5+!
[Thematic try 1.Bxd3!?
e2
2.Nf3
e1Q
3.Nxe1
Rxe1
4.Bf5+
Kd8!
(4...Kc7?
5.b6+
Kc6
6.b7
Ra1+
7.Kb8=
) 5.b6
Ra1+
and Black wins (because Whites has no move 6.Ba6 as in main line) 6.Kb8
Ra3
7.b7
d3
8.Be4
d2!-+
] 1...Kd8!
[1...Kc7
2.Bxd3
e2
3.b6+
Kc6
4.Nf3
Re7+
5.b7
Rxb7+
6.Ka6
Re7
7.Nxd4+=
] 2.Bxd3
e2
[2...Re7+
3.Kb6!
e2
4.Nf3
e1Q
5.Nxe1
Rxe1
6.Kc5=
] 3.Nf3
e1Q
4.Nxe1
Rxe1
5.b6
Ra1+
6.Ba6!
[6.Kb7!?
Ra3
7.Bc4
d3-+
] 6...Rb1
7.Be2!
zz White prevents a move Kd7 by Bg4+ [Thematic try 7.Bd3!?
Rb2!
zz (7...Rb3?
8.Bc4
Rb4
9.Bf1!
leads to main line) 8.Bc4
Kd7!
(8...Kc8?
9.Be6+
Kd8
10.Bc4
Kd7 loss of time) 9.Bd3
Kd6!
(9...Kc6?
10.Be4+
Kd6 loss of time) 10.Bf1
Kc6-+
impossible Bg2+; 7.Bc4!?
Kd7-+
impossiple Be6+] 7...Kd7
8.Bg4+
Kd6
9.Be2
Kc6
10.Bf3+
Kd7
11.Bg4+
Kd8
12.Be2
positional draw, or 12...Rb2
13.Bd3!
zz a same action of White -
13...Kd7
14.Bf5+
Kd6
15.Bd3
Kc6
16.Be4+
Kd6
17.Bd3
Kd7
18.Bf5+
Kd8
19.Bd3
positionald draw, or 19...Rb3
20.Bc4
Rb4
21.Bf1!
zz [now, can not move Be2 as in move 7. because bR not on b1. Also, 21.Bd3? has not success, because bR not on b2. 21.Be2
Kd7
22.Bg4+
Kd6
23.Be2
Rb1
etc -+] 21...Kd7
22.Bh3+
Kd6
23.Bf1
Kc6
24.Bg2+
Kd6
25.Bf1
positional draw.