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

EGTB: win in 2 half-moves

# move score
1 Rb1 win in 1 half-moves
2 Kc6 draw
3 Kc8 draw
4 Kd6 draw
5 Kd7 draw
6 Kd8 draw
7 Rb8 draw
8 Rb5 loss in 18 half-moves
9 Kb6 loss in 12 half-moves
10 Kb8 loss in 10 half-moves
11 Ra7 loss in 4 half-moves
12 Rb2 loss in 2 half-moves
13 Rb3 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb6 loss in 2 half-moves