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 Rb4 win in 1 half-moves
3 Rb6 win in 1 half-moves
4 Rc7 win in 1 half-moves
5 Ra7 loss in 2 half-moves
6 Rb1 loss in 2 half-moves
7 Rb3 loss in 2 half-moves
8 Rb5 loss in 2 half-moves
9 Rb8 loss in 2 half-moves