1.Rc8+!
[Try : 1.Nd6?
b5!
(Not 1...g4?
2.Bg2
b5
3.Rc6
Qa5+
4.Kd7
Qa7+
5.Ke6+-
) 2.Rc8+
Ka7
3.Rc7+
(3.Kd7
Qxa4=
) 3...Kb8
4.Kd7
bxa4!=
(Not 4...Qxa4?
5.Rb7++-
) ] 1...Ka7!
[1...Kxb7
2.Bg2+
e4
3.Bxe4+
Ka7
4.Ra8#
] 2.Bg2
e4!
[2...b5
(White wins sooner) 3.Nc5!
Qf6+
4.Kc7!
(4.Ke8?
e4!
5.Rc7+
Kb6!
6.Nd7+
Kxc7
7.Nxf6
e3!
8.Nd5+
Kd6
9.Nxe3
bxa4
10.Nc2
g4!
11.Kf7
Kc5!
12.Bf1
Kd5!
13.Kxg6
Ke4
14.Kg5
Kf3!=
) 4...e4
5.Bxe4
Qf4+
6.Kc6
Qf6+
7.Kxb5!+-
] 3.Bxe4!
[3.Nd6?
b5
4.Nxb5+
Kb6
5.Bxe4
Qxa4!
6.Rb8+
Kc5!=
] 3...Qxa4
[3...b5
4.Nc5
Qf6+
5.Kd7+-
]
4.Nd6!
[4.Ra8+?
Kxa8
5.Nc5+
Qxe4=
] 4...b5
5.Kc7!
[5.Ra8+?
Kb6
6.Nc8+
(6.Rxa4
bxa4
7.Bxg6
Kc5=
) 6...Kc5
7.Rxa4
bxa4!=
] 5...Qa5+
6.Kd7
Qd2
7.Ra8+!
[Thematic try: 7.Bc6?
Qe1!
(Not 7...Qe3?
8.Bxb5
Qh3+
9.Kc7
Qe3
10.Bc4!
Qb6+
11.Kd7
Qd4
12.Rc6
Kb8
13.Ra6
Qc5
14.Ra2
/a1 14...Qc7+
15.Ke6
Qd8
16.Kd5+-
) 8.Bxb5
Kb6!
9.Rc6+
Ka5
10.Rc4
Kb6
11.Bc6
Qd2!=
] 7...Kb6
8.Rb8+
Ka5
9.Rxb5+
Ka4
10.Bc6
Ka3
11.Bd5
Qd4
12.Kc6!
[Thematic try: 12.Ke6?
Qe3+!
(Not 12...Qh8?
13.Nc4+!
Ka4
14.Rb6
Qc8+
15.Kd6
Qd8+
16.Kc5
Qe7+
17.Kd4
Qd8
18.Kc3
Qh8+
19.Kc2
Qh2+
20.Kb1
Qg1+
21.Ka2
Qf2+
22.Rb2+-
) 13.Kd7
Qa7+!
14.Kd8
Qd4!
15.Kc8
g4!
16.Nc4+
Ka4
17.Rb7
Qc5+
18.Kb8
g3
19.Nb2+
Ka5
20.Ra7+
Kb5
21.Bc4+
Kc6
22.Rc7+
Kd6
23.Rxc5
Kxc5
24.Bf1
Kd4=
] 12...Qf6
13.Rb6!
[13.Rb3+?
Ka4
14.Rb6
Ka5
15.Bb3
Qxd6+
16.Kxd6
Kxb6=
] 13...Qe7
14.Rb8!
Qf6
15.Kd7!
Qg7+
16.Ke6!
Qc7
[16...Ka4
e.g. 17.Bb3+
Ka3
18.Nc4#
]
17.Nb5++-