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 Rg2 draw
4 Rg6 draw
5 Kc7 loss in 2 half-moves
6 Kc8 loss in 2 half-moves
7 Kdd7 loss in 2 half-moves
8 Kde7 loss in 2 half-moves
9 Ked7 loss in 2 half-moves
10 Kee7 loss in 2 half-moves
11 Kf7 loss in 2 half-moves
12 Kf8 loss in 2 half-moves
13 Rg3 loss in 2 half-moves
14 Rg4 loss in 2 half-moves
15 Rg5 loss in 2 half-moves
16 Rg7 loss in 2 half-moves
17 Rh8 loss in 2 half-moves