Mate in 20

White begins.

Originally posted by Bowmann
[fen]B7/p1p5/kb1p4/p3p3/P1N2p2/6p1/7p/K7[/fen]

White begins.

1.Kb1 B~ 2.Kc2 B~ 3.Kd1 B~ 4.Ke2 B~ 5.Kf1 B~ 6.Kg2 h1Q+ 7.Kxh1 B~ 8.Kg2 B~ 9.Kh3 g2 10.Bxg2 f3 11.Bxf3 e4 12.Bxe4 d5 13.Bxd5 c6 14.Bxc6 B~ 15.Kg4 B~ 16.Kf5 B~ 17.Ke6 B~ 18.Kd7 B~ 19.Kc8 B~ 20.Bb7#

It doesn't make any difference how Black marks time.