Click on the third or sixth rank to set the en passant target square.

EGTB: win in 4 half-moves

# move score
1 Kg6 win in 3 half-moves
2 Rh7 draw
3 Kd4 loss in 2 half-moves
4 Kd5 loss in 2 half-moves
5 Kd6 loss in 2 half-moves
6 Kee4 loss in 2 half-moves
7 Kee6 loss in 2 half-moves
8 Kef4 loss in 2 half-moves
9 Kef6 loss in 2 half-moves
10 Kfe4 loss in 2 half-moves
11 Kfe6 loss in 2 half-moves
12 Kff4 loss in 2 half-moves
13 Kff6 loss in 2 half-moves
14 Kg4 loss in 2 half-moves
15 Kg5 loss in 2 half-moves
16 Rg5 loss in 2 half-moves
17 Rh1 loss in 2 half-moves
18 Rh2 loss in 2 half-moves
19 Rh3 loss in 2 half-moves
20 Rh4 loss in 2 half-moves
21 Rh6 loss in 2 half-moves
22 Rh8 loss in 2 half-moves