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 Rb6 win in 1 half-moves
3 Ra1 loss in 4 half-moves
4 Kb2 loss in 2 half-moves
5 Kc2 loss in 2 half-moves
6 Kd1 loss in 2 half-moves
7 Kd2 loss in 2 half-moves
8 Rb2 loss in 2 half-moves
9 Rb7 loss in 2 half-moves
10 Rb8 loss in 2 half-moves
11 Rb4 loss in 1 half-moves
12 Rb5 loss in 1 half-moves