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

EGTB: win in 8 half-moves

# move score
1 Rb8 win in 7 half-moves
2 K6d7 draw
3 K8b7 draw
4 K8c7 draw
5 K8d7 draw
6 Kb8 draw
7 Kd5 draw
8 Kd6 draw
9 Kd8 draw
10 Ra6 draw
11 K6b7 loss in 2 half-moves
12 K6c7 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Rb1 loss in 2 half-moves
16 Rb2 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rb4 loss in 2 half-moves
19 Rb5 loss in 2 half-moves
20 Rb7 loss in 2 half-moves