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Rook vs Bishop + Knight Ending Contest

Can you find white's winning plan?

6B1/3p3p/3P3k/rN1P4/4Kp2/8/8/8 w - - 0 1

V-1

1.Nc7 Ra4+
2.Kf3 Rb4
3.Be6 dxe6
4.dxe6 Kg5
5.d7 Rd4
6.e7 Rxd7
7.e8=Q Rd3+
8.Kf2 Rd2+
9.Ke1 Rd6
10.Qe5+ Kh6
11.Qxd6+ Kg5
It's a win for white.

V-2

1.Nc7 Ra4+
2.Kf3 Rb4
3.Be6 Rb6
4.Ne8 Kg5
5.Bxd7 Rb3+
6.Ke4 f3
7.Bh3 Rb8
8.d7 Kh4
9.Bf1 Kg3
10.Ke5 Kf2
11.Ba6 Kg2
12.Kd6 h6
13.Kc7 Ra8
14.d8=Q Rxd8
15.Kxd8 h5
16.Nf6 h4
17.Ng4 Kg3
18.Ne3 Kf4
19.Nf1 Ke5
20.Bb7 Kd6
21.Nd2 f2
22.Ne4+ Ke5
23.Nxf2 Kf4
24.d6 Ke3
25.Nh3
It's a win for white.

1.Nc7 f3!? is a more testing defense. In addition, you need to convince yourself that white can't win with 1.Nd4.

V-3

1.Nc7 f3
2.Kxf3 Kg7
3.Be6 Kf6
4.Bxd7 Ke5
5.Nb5 Ra8
6.Be6 Rd8
7.d7 Rf8+
8.Kg4 Rd8
9.Na7 Kd6
10.Kh5 Rxd7
11.Nb5+ Kc5
12.Bxd7 Kxd5
13.Kh6 Ke5
14.Kxh7
It's a win for white.

one of the topmost puzzle... madam can you give any idea to IM GM women NOTATION SITE OR PDF FILE... SO I WANT CHECK HOW STRONG THEY PLAY PLE ASE

in V3, what about 5......Kxd5?

V-4

1.Nc7 f3
2.Kxf3 Kg7
3.Be6 Kf6
4.Bxd7 Ke5
5.Nb5 Kxd5
6.Bc8 Ra1
7.d7 Rf1+
8.Kg4 Rg1+
9.Kf5 Rg8
10.Kf6 Kc5
11.Kf7 Rd8
12.Ke7 Rg8
13.Nc3 Kc6
14.d8=Q Rxd8
15.Kxd8 Kd6
It's a win for white.

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