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

EGTB: win in 4 half-moves

# move score
1 Rh3 win in 3 half-moves
2 Ra6 draw
3 Rc6 draw
4 Rd6 draw
5 Re6 draw
6 Rh4 draw
7 Rh5 draw
8 Kf1 loss in 2 half-moves
9 Kf2 loss in 2 half-moves
10 Kg3 loss in 2 half-moves
11 Kgg2 loss in 2 half-moves
12 Kgh1 loss in 2 half-moves
13 Kh3 loss in 2 half-moves
14 Khg2 loss in 2 half-moves
15 Khh1 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rf6 loss in 2 half-moves
18 Rg6 loss in 2 half-moves
19 Rh7 loss in 2 half-moves
20 Rh8 loss in 2 half-moves