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 Rc8 win in 3 half-moves
3 Rd8 win in 3 half-moves
4 Re8 win in 3 half-moves
5 Ra8 draw
6 Rh3 draw
7 Rh4 draw
8 Rh5 draw
9 Rh7 draw
10 Kb1 loss in 2 half-moves
11 Kb2 loss in 2 half-moves
12 Kc3 loss in 2 half-moves
13 Kcc2 loss in 2 half-moves
14 Kcd1 loss in 2 half-moves
15 Kd3 loss in 2 half-moves
16 Kdc2 loss in 2 half-moves
17 Kdd1 loss in 2 half-moves
18 Ke1 loss in 2 half-moves
19 Ke2 loss in 2 half-moves
20 Ke3 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves
23 Rh1 loss in 2 half-moves
24 Rh2 loss in 2 half-moves
25 Rh6 loss in 2 half-moves