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

EGTB: win in 4 half-moves

# move score
1 Rh4 win in 3 half-moves
2 Ke1 win in 5 half-moves
3 Rh3 win in 5 half-moves
4 Rh5 win in 7 half-moves
5 Rh6 win in 7 half-moves
6 Rh7 win in 7 half-moves
7 Rg1 draw
8 Rh8 draw
9 Kc2 loss in 2 half-moves
10 Kc3 loss in 2 half-moves
11 Kc4 loss in 2 half-moves
12 Kd2 loss in 2 half-moves
13 Kd4 loss in 2 half-moves
14 Kde2 loss in 2 half-moves
15 Ke3 loss in 2 half-moves
16 Ke4 loss in 2 half-moves
17 Kf2 loss in 2 half-moves
18 Kfe2 loss in 2 half-moves
19 Rh2 loss in 2 half-moves
20 Kg1 loss in 1 half-moves
21 Kg2 loss in 1 half-moves