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

EGTB: win in 2 half-moves

# move score
1 Rb3 win in 1 half-moves
2 Kb8 draw
3 Kc6 draw
4 Kc8 draw
5 Kd6 draw
6 Rb5 draw
7 Rb6 draw
8 Rb8 draw
9 Kb6 loss in 36 half-moves
10 Kd8 loss in 12 half-moves
11 Kd7 loss in 4 half-moves
12 Ra7 loss in 4 half-moves
13 Rb1 loss in 2 half-moves
14 Rb2 loss in 2 half-moves
15 Rb4 loss in 2 half-moves