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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 Kcd5 win in 3 half-moves
4 Kd6 win in 3 half-moves
5 Kc6 win in 5 half-moves
6 Kd3 win in 5 half-moves
7 Kdd5 win in 5 half-moves
8 Rc3 win in 5 half-moves
9 Kb4 draw
10 Kc3 draw
11 Ke3 draw
12 Ra4 draw
13 Rb4 draw
14 Rc1 draw
15 Rc2 draw
16 Ke4 loss in 2 half-moves
17 Ke5 loss in 2 half-moves