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

EGTB: win in 4 half-moves

# move score
1 Rg2 win in 3 half-moves
2 Ke1 draw
3 Kfg2 draw
4 Kgg2 draw
5 Kh1 draw
6 Kh2 draw
7 Rb6 draw
8 Rf6 draw
9 Rg7 draw
10 Rg8 draw
11 Rh6 draw
12 Ke2 loss in 2 half-moves
13 Kff2 loss in 2 half-moves
14 Kgf2 loss in 2 half-moves
15 Ra6 loss in 2 half-moves
16 Rc6 loss in 2 half-moves
17 Rd6 loss in 2 half-moves
18 Re6 loss in 2 half-moves
19 Rg3 loss in 2 half-moves
20 Rg4 loss in 2 half-moves
21 Rg5 loss in 2 half-moves