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

EGTB: win in 2 half-moves

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