Brain Teaser Puzzle

This was the study of the year in 2008 in the Congress of Chess Composition. I never thought the beginning was all that difficult to find, but the details after that point were surprising to find.

8/1q1P3K/5k2/8/Q7/p7/P7/8 w - - 0 1

Comments
No. 1-1
Alena
Alena

Thanks Yancey. This puzzle is amazing.

v-1

1.Qf4+ Ke7
2.Qf7+ Kxf7
3.d8=N+ Kf6+
4.Nxb7 Ke5
Now it's a key position.The plan is preserve the only pawn. The easiest part is over. After that I'll consider Ke6, Kd4 and Ke4.
5.Kg6 Ke6
6.Na5 Ke5
7.Kg5 Kd4
8.Kf4 Kc3
9.Ke3 Kc2
10.Nc4 Kc3
11.Nd2 Kb4
12.Kd4 Kb5
13.Kc3 Ka4
14.Nc4 Kb5
15.Kb3 Kc5
16.Nxa3 Kb6
17.Kb4 Ka6
18.Nc4 Ka7
19.Kb5 Kb7
20.Nd6+ Kc7
21.a4 Kxd6
22.Kb6 Kd7
23.Kb7 Ke8
24.a5 Kf7
25.a6 Kg6
26.a7 Kf5
27.a8=Q
It's a win for white.

V-2

5.Kg6 Kd4
6.Kf5 Kc3
7.Ke4 Kb2
8.Kd3 Kxa2
9.Kc2 Ka1
10.Nc5 Ka2
11.Nd3 Ka1
12.Nc1 a2
13.Nb3#

It's a very beautiful variant.

V-3

5.Kg6 Ke4
6.Kg5 Kd3
7.Kf4 Kd4
8.Na5 Kc3
9.Ke3 Kc2
10.Nc4 Kb1
11.Kd2 Ka1
12.Na5 Kb2
13.Kd1 Kc3
14.Kc1 Kb4
15.Nc6+ Kc5
16.Ne7 Kd6
17.Nf5+ Ke5
18.Ne3 Kd6
19.Kc2 Kc5
20.Kb3 Kd4
21.Nc2+ Ke5
22.Nxa3 Kd4
23.Nb5+ Kd5
24.Kb4 Ke4
25.a4 Kd5
26.Na7 Kd6
27.Kb5 Kc7
28.Ka6 Kd6
29.Kb7 Kc5
30.a5 Kd5
31.a6 Kc5
32.Nc8 Kb5
33.a7 Ka4
34.a8=Q
It's a win for white.

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