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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Kd4 draw
3 Kd5 draw
4 Ke4 draw
5 Kf4 draw
6 Ra5 draw
7 Rb1 draw
8 Rb2 draw
9 Rb3 draw
10 Rc5 draw
11 Kd6 loss in 2 half-moves
12 Ke6 loss in 2 half-moves
13 Kf5 loss in 2 half-moves
14 Kf6 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rb7 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rd5 loss in 2 half-moves