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 Kf4 draw
3 Kf5 draw
4 Kgg4 draw
5 Kgh5 draw
6 Kh3 draw
7 Kh6 draw
8 Khh5 draw
9 Rb1 draw
10 Rg1 draw
11 Rh2 draw
12 Kf6 loss in 2 half-moves
13 Kg3 loss in 2 half-moves
14 Kg6 loss in 2 half-moves
15 Khg4 loss in 2 half-moves
16 Ra1 loss in 2 half-moves
17 Rc1 loss in 2 half-moves
18 Rd1 loss in 2 half-moves
19 Re1 loss in 2 half-moves
20 Rf1 loss in 2 half-moves