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

EGTB: win in 8 half-moves

# move score
1 Kb5 win in 7 half-moves
2 Kb6 win in 7 half-moves
3 Ra8 win in 9 half-moves
4 Ka6 draw
5 Kd5 draw
6 Kd7 draw
7 Rd7 draw
8 Rg8 draw
9 Ka4 loss in 2 half-moves
10 Kb4 loss in 2 half-moves
11 Kc5 loss in 2 half-moves
12 Kc6 loss in 2 half-moves
13 Kc7 loss in 2 half-moves
14 Ke5 loss in 2 half-moves
15 Ke6 loss in 2 half-moves
16 Ke7 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rc8 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rh8 loss in 2 half-moves