Mate in 15 [7/28]

White mates in 15

1.Kxd2+ K-a2
2.R-f5 K-b1
3.R-h5 K-a2
4.R-g5 K-b1
5.Rxg4 K-a2
6.R-g5 K-b1
7.R-c5 K-a2
8.-g4 K-b1
9.-g5 K-a2
10.-g6 K-a2
11.B-f6 K-b1
12.-g7 K-a2
13.-g8Q K-b1
14.Q-g1+ K-a2
15.R-a5#

Originally posted by Thomaster
1.Kxd2+ K-a2
2.R-f5 K-b1
3.R-h5 K-a2
4.R-g5 K-b1
5.Rxg4 K-a2
6.R-g5 K-b1
7.R-c5 K-a2
8.-g4 K-b1
9.-g5 K-a2
10.-g6 K-a2
11.B-f6 K-b1
12.-g7 K-a2
13.-g8Q K-b1
14.Q-g1+ K-a2
15.R-a5#

What if 2...b1=N+ ?

1.Rf8

1...Ka2 2.Ra8+ Kb1 3.Bd4 g3 4.Ba7 Ka2 5.Bb6+ Kb1
6.Ba5 Ka2 7.Bxb4+ Kb1 8.Rd8 Ka2 9.Rxd2 Kb1
10.Re2 Ka2 11.Ke1 Kb1 12.Kd2 Ka2 13.Kc3 Kb1
14.Kxb3 15.Re1#

1...g3 2.Bd4 Ka2 3.Ra8+ Kb1 4.Ba7 etc.

Originally posted by David113
1.Rf8

1...Ka2 2.Ra8+ Kb1 3.Bd4 g3 4.Ba7 Ka2 5.Bb6+ Kb1
6.Ba5 Ka2 7.Bxb4+ Kb1 8.Rd8 Ka2 9.Rxd2 Kb1
10.Re2 Ka2 11.Ke1 Kb1 12.Kd2 Ka2 13.Kc3 Kb1
14.Kxb3 15.Re1#

1...g3 2.Bd4 Ka2 3.Ra8+ Kb1 4.Ba7 etc.

SOLV'D

Originally posted by SwissGambit
SOLV'D

COMPOS'D by?

Originally posted by heinzkat
COMPOS'D by?

Alexander Shilin

Thank you. It's a good problem!