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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kcb5 win in 3 half-moves
3 Kcb6 win in 3 half-moves
4 Rb8 win in 3 half-moves
5 Kb7 win in 5 half-moves
6 Rc7 win in 5 half-moves
7 Ka7 win in 7 half-moves
8 Ka5 draw
9 Kab5 draw
10 Kab6 draw
11 Kc4 draw
12 Kc6 draw
13 Ra8 draw
14 Rc6 draw
15 Rh8 draw
16 Kd4 loss in 2 half-moves
17 Kd5 loss in 2 half-moves
18 Kd6 loss in 2 half-moves
19 Rd8 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves