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

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Kc7 win in 3 half-moves
3 Kd7 win in 3 half-moves
4 Rb8 win in 3 half-moves
5 Kd5 win in 5 half-moves
6 Kd6 win in 5 half-moves
7 Rh8 win in 5 half-moves
8 Kg6 win in 7 half-moves
9 Rc8 win in 7 half-moves
10 Kb5 draw
11 Kb6 draw
12 Kc5 draw
13 Kf6 draw
14 Kf7 draw
15 Kf8 draw
16 Kh6 draw
17 Kh7 draw
18 Kh8 draw
19 Ra8 draw
20 Rd8 loss in 2 half-moves
21 Re8 loss in 2 half-moves
22 Rf8 loss in 2 half-moves