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

EGTB: win in 4 half-moves

# move score
1 Rg8 win in 3 half-moves
2 Rg7 win in 5 half-moves
3 K7b7 draw
4 K7b8 draw
5 K8b7 draw
6 K8b8 draw
7 Rb6 draw
8 Rd6 draw
9 Re6 draw
10 Rf6 draw
11 Rg1 draw
12 Rg5 draw
13 Rh6 draw
14 Ka6 loss in 2 half-moves
15 Ra6 loss in 2 half-moves
16 Rc6 loss in 2 half-moves
17 Rg2 loss in 2 half-moves
18 Rg3 loss in 2 half-moves
19 Rg4 loss in 2 half-moves
20 Kb6 loss in 1 half-moves