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

EGTB: win in 6 half-moves

# move score
1 Kb7 win in 5 half-moves
2 Kb8 win in 5 half-moves
3 Kc3 win in 5 half-moves
4 Kc4 win in 5 half-moves
5 Kc5 win in 5 half-moves
6 Rb8 win in 7 half-moves
7 Ka7 draw
8 Kd3 draw
9 Kd5 draw
10 Ke3 draw
11 Ke4 draw
12 Ke5 draw
13 Rc8 draw
14 Rd7 draw
15 Re8 draw
16 Rf8 draw
17 Rd5 loss in 2 half-moves
18 Rd6 loss in 2 half-moves
19 Rg8 loss in 2 half-moves
20 Rh8 loss in 2 half-moves