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

EGTB: win in 4 half-moves

# move score
1 Rf8 win in 3 half-moves
2 Rg1 draw
3 Rg3 draw
4 Rg4 draw
5 Rg5 draw
6 Kb7 loss in 2 half-moves
7 Kb8 loss in 2 half-moves
8 Kc7 loss in 2 half-moves
9 Kcd7 loss in 2 half-moves
10 Kcd8 loss in 2 half-moves
11 Ke7 loss in 2 half-moves
12 Ked7 loss in 2 half-moves
13 Ked8 loss in 2 half-moves
14 Kf7 loss in 2 half-moves
15 Kf8 loss in 2 half-moves
16 Rg2 loss in 2 half-moves
17 Rg6 loss in 2 half-moves
18 Rg7 loss in 2 half-moves
19 Rh8 loss in 2 half-moves