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

EGTB: win in 4 half-moves

# move score
1 Rd7 win in 3 half-moves
2 K7d7 draw
3 K8d7 draw
4 K8d8 draw
5 Ra7 draw
6 Rb4 draw
7 Rb8 draw
8 Rc7 draw
9 K7d8 loss in 2 half-moves
10 K7f7 loss in 2 half-moves
11 K7f8 loss in 2 half-moves
12 K8f7 loss in 2 half-moves
13 K8f8 loss in 2 half-moves
14 Kd6 loss in 2 half-moves
15 Ke6 loss in 2 half-moves
16 Kf6 loss in 2 half-moves
17 Rb1 loss in 2 half-moves
18 Rb2 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rb5 loss in 2 half-moves
21 Rb6 loss in 2 half-moves