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

EGTB: win in 4 half-moves

# move score
1 Rg6 win in 3 half-moves
2 Ra3 draw
3 Rc3 draw
4 Rd3 draw
5 Re3 draw
6 Rg1 draw
7 Rg2 draw
8 Kf6 loss in 2 half-moves
9 Kf7 loss in 2 half-moves
10 Kf8 loss in 2 half-moves
11 Kg6 loss in 2 half-moves
12 Kgg8 loss in 2 half-moves
13 Kgh7 loss in 2 half-moves
14 Kh6 loss in 2 half-moves
15 Khg8 loss in 2 half-moves
16 Khh7 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rf3 loss in 2 half-moves
19 Rg4 loss in 2 half-moves
20 Rg5 loss in 2 half-moves
21 Rh3 loss in 2 half-moves