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 a3 loss in 2 half-moves
4 Rb1 loss in 2 half-moves
5 Rb3 loss in 2 half-moves
6 Rb5 loss in 2 half-moves
7 Rb8 loss in 2 half-moves
8 Rc7 loss in 2 half-moves
9 Rd7 loss in 2 half-moves
10 Re7 loss in 2 half-moves
11 Rf7 loss in 2 half-moves
12 Rh7 loss in 2 half-moves
13 Ra7 loss in 1 half-moves
14 Rb6 loss in 1 half-moves
15 Rg7 loss in 1 half-moves