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 Rb6 loss in 20 half-moves
3 Rb5 loss in 16 half-moves
4 Kb8 loss in 14 half-moves
5 Rb8 loss in 14 half-moves
6 Kc6 loss in 12 half-moves
7 Kc8 loss in 12 half-moves
8 Kd6 loss in 8 half-moves
9 Kb6 loss in 6 half-moves
10 Kd7 loss in 4 half-moves
11 Kd8 loss in 4 half-moves
12 Ra7 loss in 4 half-moves
13 Rb2 loss in 2 half-moves
14 Rb3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves