1.Ng5+
Kxd5
2.Kg7!
Kc4
3.Bd2!
main B 3...Qg1
[main A 3...Qg2
4.Ra5!
( try 4.Kf6?
Qf2+
5.Kg6
Qb6+
6.Kh5
Qb3!
7.Ra8
Qd1
8.Rc8+
Kb5!-+
) 4...Kd3
5.Be1
Qg1
6.Bg3!!
(6.Bh4?
Qd4+
7.Kg6
Qb6+-+
; 6.Ra3+?
Kc4-+
) 6...Kc4
(or also 6...Qxg3
7.Ra3+=
echo win of queen; 6...Kc2
7.Ra2+
Kb3
8.Rxe2=
) 7.Bh4!
Kb3
(or also 7...Qd4+
8.Kf7!
Qxh4
9.Ra4+=
echo win of queen) 8.Rb5+
Ka4
9.Rd5!
Qd1
10.Ne4!=
] 4.Kf7!
[4.Kg6?
Qb1+-+
] 4...Qf2+
5.Kg8!!
[Thematic try 5.Kg6?
Qb6+
6.Kh5
Qb3
7.Ra8
Qd1!
8.Rc8+
Kb5-+
see the try in the main line "A"] 5...Kb3
[or also 5...e1Q
6.Ra4+
Kb5
7.Ra5+
Kb6
8.Bxe1=
; 5...Qb6
6.Nf7!
Kb3
7.Ra5
Kc2
8.Rd5
Qe6
9.Rd8=
] 6.Ra5!
Qd4
[6...Kc2
7.Ra2+
Kb1
8.Ra5!
Qd4
9.Be1
Qg1
(9...Qf6
10.Nf7
Qf1
11.Rb5+
Kc1
12.Ba5
etc, draw) 10.Rb5+
Kc1
11.Ba5
Qd4
12.Nf7
Kd1
13.Re5=
] 7.Be1
Qg1
8.Bh4!
[8.Bg3?
Qxg3
and no Ra3+ as in the main line "A"; 8.Bd2?
Kc2
9.Ra2+
Kd3-+
] 8...Qb6
9.Be1
Qg1
10.Bh4
Qd4
11.Be1
positional draw, or 11...Qd1
12.Rb5+!
[12.Nf3?
Qd8+
13.Kg7
Qd7+
14.Kf6
Qc6+-+
] 12...Ka4
13.Ra5+
Kb3
14.Rb5+
positional draw.