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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kb5 win in 3 half-moves
3 Kcd5 win in 3 half-moves
4 Kcd6 win in 3 half-moves
5 Kd4 win in 3 half-moves
6 Kd7 win in 3 half-moves
7 Ked5 win in 3 half-moves
8 Rd6 win in 3 half-moves
9 Kc4 win in 5 half-moves
10 Ked6 win in 5 half-moves
11 Ke5 draw
12 Ke7 draw
13 Kf5 draw
14 Kf6 draw
15 Kf7 draw
16 Kb6 loss in 2 half-moves
17 Ra6 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rc7 loss in 2 half-moves
20 Rc8 loss in 2 half-moves