1.Nb3!
logical chose of square for night. It is necessary to force the black king to b3. [Another square gave to Black easy win- 1.Nc2?
Kxc2
2.Ne4
f1Q-+
; Thematic try 1.Bd8?
Nc4!
(not 1...Nc8?
2.Kd5
Nh6
3.Nf1
Nf5
4.Ke6
Ncd6
5.Bf6
Bxf6
6.Kxf6=
) 2.Kd5
Ne3+!
3.Ke4
(3.Kxd4
Nf5+-+
) 3...Nh6!
4.Kf3
Nef5
5.Nf1
Nf7
6.Bc7
N7d6!
(not 6...Kxa1?
7.b5
N7d6
8.b6=
) 7.Ke2
Kxa1-+
] 1...Kxb3
2.Ne4!
Now it is clear why it was necessary to force bK on b3 2...f1N!
[2...f1Q
3.Nd2+
Kxb4
4.Nxf1
classical draw] 3.b5
Nc8!
[3...Kb4
4.Bd8!
Nc4
5.b6
Nfe3
6.b7
Ba7
7.Bg5=
; 3...Nc4
4.Nc5+
Kc3
5.Ne4+
Kb4
6.Be1+
Kb3
7.Kd5
Bb6
8.Nc5+
Bxc5
9.Kxc5=
] 4.Kc7
[4.Kd7?
Na7
5.Nd6
Ne3=
] 4...Nce7
5.Kd7
Nd5
[5...Ng6
6.Bd8
Kc4
(6...Nf8+
7.Kc6=
) 7.b6
Kd5
8.b7
Ne5+
9.Kc8
Nc6
10.Ng5!
Nge7+
(10...Ba7
11.Bc7
Nd2
12.b8Q
Bxb8
13.Bxb8=
) 11.Kd7
Ng6
12.Bc7
Nge5+
13.Kc8=
] 6.Bg5!
Be3!
[or also 6...Kc4
7.Nd6+
Kc5
8.Ne4+
Kxb5
9.Ke6
Kc6
10.Kf7
domination] 7.Bxe3
Nfxe3
8.Kc6
Nb4+
[8...Nge7+
9.Kc5=
] 9.Kd6!
[9.Kc5?
Ka4!
10.b6
Na6+
11.Kd4
(11.Kc6
Ne7+!
12.Kd6
Nc8+
13.Kc6
Ka5
14.Nd6
Ne7+-+
) 11...Nc2+-+
] 9...Nc4+
[9...Ned5
10.Kc5
Ka4
11.b6
Nge7
12.b7
Nec6
13.Nf2!
draws: 13...Nf4
14.Ne4
Ka5
15.Kd6=
] 10.Ke6!
[10.Kc5?
Ne7
11.b6
Na6+
12.Kb5
Nb8
13.b7
Nec6
14.Nc5+
Kc3-+
] 10...Nh6
11.Nd6!
Nb6
[11...Ne3
12.b6!
(12.Nf7?
Nhf5
13.b6
Nd4+-+
) 12...Na6
13.b7
Nhg4
14.Ne4
Kc4
15.Nf6=
] 12.Nf7!
Ng4
13.Ne5!
Ne3
[or 13...Nf2
14.Nd7=
] 14.Nd7!
Nbc4
15.Ne5!
Na5
16.Nc6!=