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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Kd1 draw
3 Kd2 draw
4 Kd3 draw
5 Ra8 draw
6 Rc8 draw
7 Rd8 draw
8 Rh1 draw
9 Rh2 draw
10 Rh3 draw
11 Rh4 draw
12 Ka5 loss in 2 half-moves
13 Ka7 loss in 2 half-moves
14 Kb1 loss in 2 half-moves
15 Kb2 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Kb5 loss in 2 half-moves
18 Kb6 loss in 2 half-moves
19 Kb7 loss in 2 half-moves
20 Kc1 loss in 2 half-moves
21 Kc3 loss in 2 half-moves
22 Re8 loss in 2 half-moves
23 Rf8 loss in 2 half-moves
24 Rg8 loss in 2 half-moves
25 Rh5 loss in 2 half-moves
26 Rh6 loss in 2 half-moves
27 Rh7 loss in 2 half-moves