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

EGTB: win in 4 half-moves

# move score
1 Rg4 win in 3 half-moves
2 Kf4 draw
3 Kf5 draw
4 Kf6 draw
5 Kg4 draw
6 Kg7 draw
7 Kgg6 draw
8 Kgh5 draw
9 Kh4 draw
10 Kh7 draw
11 Khg6 draw
12 Khh5 draw
13 Rb3 draw
14 Rf3 draw
15 Rh3 draw
16 Ra3 loss in 2 half-moves
17 Rc3 loss in 2 half-moves
18 Rd3 loss in 2 half-moves
19 Re3 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rg2 loss in 2 half-moves