CHESS SOLUTION

1 Bf5! If now (a) 1 … b6 2 Bc8 a5 3 Bd7 c5 4 Bb5 wins; (b) 1 … a5 2 Bc8 b5 3 Bd7 b4 4 Ba4 c5 5 Bb3 wins; (c) 1 … c6 2 Bc8 b6 3 Bb7 c5 4 Ba6 wins; (d) 1 … b5! (best) 2 Bd7 b4 3 Ba4 a5 4 Bd1! c6 5 Ba4 c5 6 Bb3 c4 7 Bxc4 a4 8 Bb5 b3 9 Bxa4 b2 10 Bc2 wins.