Puzzle
Back-rank mate
Invade the open file.
8
7
6
5
4
3
2
a1
b
c
d
e
f
g
h
White to move
White's rook controls the open a-file. Deliver mate in one.
Puzzle
Invade the open file.
White to move
White's rook controls the open a-file. Deliver mate in one.