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

EGTB: win in 2 half-moves

# move score
1 Rg4 win in 1 half-moves
2 Ka7 draw
3 Kf1 draw
4 Kf2 draw
5 Kg2 draw
6 Kh1 draw
7 Kh2 draw
8 Rb8 draw
9 Rf8 draw
10 Rh8 draw
11 Kb7 loss in 2 half-moves
12 Kb8 loss in 2 half-moves
13 Rc8 loss in 2 half-moves
14 Rd8 loss in 2 half-moves
15 Re8 loss in 2 half-moves
16 Rg2 loss in 2 half-moves
17 Rg3 loss in 2 half-moves
18 Rg5 loss in 2 half-moves
19 Rg6 loss in 2 half-moves
20 Rg7 loss in 2 half-moves