with wR --->>> f8
1.Rg8!
[1.Rc8?
b3=
; 1.Ke1?
Bd6=
] 1...b3
[1...Nc3+
2.Ke1!
Ba7
3.Rxg4
b3
4.Rxg3
and easy win] 2.Nxg4
Nc3+
[2...Ba7
3.Nge5!
Nc3+
4.Ke1
main line]
3.Ke1!
[Thematic try: 3.Kd2?
and the "study in study" with BTM win: 3... 3...Ne4+
4.Ke2
Ba7
5.Nge5
Kc2
6.Ne1+
(6.Kf3
Nd2+
7.Kg2
b2
8.Nxb2
Kxb2=
) 6...Kc3!
7.Rc8+
Bc5!
8.N5d3
b2
9.Nxb2
Kxb2
10.Nd3+
Ka2!!
(10...Kb1?
11.Kf3
g2
12.Kxg2=
; 10...Kb3?
11.Nxc5+
Nxc5
12.Rxc5+-
; 10...Ka3
11.Nxc5+-
) 11.Nxc5
g2
12.Ra8+
Kb1!
(12...Kb2?
13.Nd3+
Kb3
14.Rg8+-
) 13.Rg8
Nxc5=
] 3...Ba7
[3...Ne4
4.Ne3
/Nf6 <eg> 4...Ba7
5.Nd1!
Bd4
6.Rg4!
Kc2
7.Nb4++-
] 4.Nge5
Bf2+
[4...Ne4
5.Rg4!
Nf2
6.Rxg3
b2
7.Rg2
/Nc4+-] 5.Kf1
b2
[5...Ne4
6.Nc4
Kc2
7.Nxf2
gxf2
8.Rb8
Kc3
9.Ne3+-
] 6.Nc4
Na4
7.Rc8!
[7.Rb8?
Bd4=
; 7.Rg4?
Kc2=
; 7.Nxf2?
gxf2=
] 7...Ka1!
[7...Kc2
8.Ncxb2++-
] 8.Nd2
b1Q+
9.Nxb1
Kxb1
10.Rc4
Nb6
11.Rb4++-.