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

EGTB: win in 4 half-moves

# move score
1 Kb3 win in 3 half-moves
2 Kb4 win in 3 half-moves
3 Kb5 win in 3 half-moves
4 Rb5 win in 3 half-moves
5 Rc5 win in 3 half-moves
6 Ka3 win in 5 half-moves
7 Kc5 win in 7 half-moves
8 Ke5 win in 15 half-moves
9 Ra7 win in 17 half-moves
10 Ra8 win in 17 half-moves
11 Kc4 loss in 2 half-moves
12 Kc6 loss in 2 half-moves
13 Kd4 loss in 2 half-moves
14 Kd6 loss in 2 half-moves
15 Ke4 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Ra6 loss in 2 half-moves