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

EGTB: win in 4 half-moves

# move score
1 Rh8 win in 3 half-moves
2 Ka7 draw
3 Kf5 draw
4 Kg5 draw
5 Kh5 draw
6 Rc8 draw
7 Rd8 draw
8 Re8 draw
9 Rf8 draw
10 Rg8 draw
11 Kb6 loss in 2 half-moves
12 Kb7 loss in 2 half-moves
13 Kf6 loss in 2 half-moves
14 Kf7 loss in 2 half-moves
15 Kg7 loss in 2 half-moves
16 Kh6 loss in 2 half-moves
17 Kh7 loss in 2 half-moves
18 Ra7 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Ka5 loss in 1 half-moves
21 Kb5 loss in 1 half-moves