This position holds a really nice secret. Black gets mated with
white having only a bishop left. It's not easy to spot.
1. Bh6+ Kg8 2. g7
The pawn is safe for now, but how can white improve? Black
will keep his king on the fields f7 and g8 and white cannot
prevent this without stalemating black or loosing the pawn.
2. ... Kf7
(see next diagram)
Let's check some other tries for black:
2. ... e5 3. Ke6 e4 4. Kf6 e3 5. Bxe3 and white wins easily with
the bishop and the pawn. But black can try to improve and win a
move so that the white pawn is not covered by the king the
moment the bishop must take the pawn on e3. Unfortunately for
black, white can maneuver exactly and make sure the pawn
is covered at the right time. 2. ... e6+ 3. Kd6 Kf7 4. Ke5 Kg8
5. Kf6 e5 6. Ke7 e4 7. Kf6 with a position you already know.
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3. g8-Q+!!
Unbelievable. White sacrifices its last pawn, but black's king
is forced on a very unpleasant way now.
3. ... Kxg8 4. Ke6 Kh8 5. Kf7!
Taking the pawn leads to a simple stalemate and white is out for more.
5. ... e5 6. Bg7# 1 - 0
