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