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

EGTB: win in 2 half-moves

# move score
1 Rb7 win in 1 half-moves
2 Kd8 loss in 2 half-moves
3 Kf8 loss in 2 half-moves
4 Ra8 loss in 2 half-moves
5 Rb1 loss in 2 half-moves
6 Rb2 loss in 2 half-moves
7 Rb3 loss in 2 half-moves
8 Rb4 loss in 2 half-moves
9 Rb5 loss in 2 half-moves
10 Rb6 loss in 2 half-moves
11 Rc8 loss in 2 half-moves
12 Rd8 loss in 2 half-moves
13 Kd7 loss in 1 half-moves
14 Ke7 loss in 1 half-moves
15 Kf7 loss in 1 half-moves