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

EGTB: win in 2 half-moves

# move score
1 Rb2 win in 1 half-moves
2 Rb3 win in 1 half-moves
3 Rb4 draw
4 Kb6 loss in 2 half-moves
5 Kc6 loss in 2 half-moves
6 Ra5 loss in 2 half-moves
7 Rb1 loss in 2 half-moves
8 Rb6 loss in 2 half-moves
9 Rb7 loss in 2 half-moves
10 Rb8 loss in 2 half-moves
11 Kb4 loss in 1 half-moves
12 Kc4 loss in 1 half-moves
13 Kd4 loss in 1 half-moves
14 Kd5 loss in 1 half-moves
15 Kd6 loss in 1 half-moves