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 Rh6 win in 5 half-moves
3 Rd2 draw
4 Re2 draw
5 Rf2 draw
6 Rg2 draw
7 Rh1 draw
8 Rh5 draw
9 Rh7 draw
10 K7b7 loss in 2 half-moves
11 K7b8 loss in 2 half-moves
12 K8b7 loss in 2 half-moves
13 K8b8 loss in 2 half-moves
14 Ka6 loss in 2 half-moves
15 Kb6 loss in 2 half-moves
16 Ra2 loss in 2 half-moves
17 Rb2 loss in 2 half-moves
18 Rc2 loss in 2 half-moves
19 Rh3 loss in 2 half-moves
20 Rh4 loss in 2 half-moves