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 draw
3 Kb7 draw
4 Kc5 draw
5 Kc7 draw
6 Kcd7 draw
7 Ke7 draw
8 Ked7 draw
9 Kf6 draw
10 Kf7 draw
11 Rd1 draw
12 Rd5 draw
13 Rd7 draw
14 Rd8 draw
15 Kcd5 loss in 2 half-moves
16 Ke5 loss in 2 half-moves
17 Ked5 loss in 2 half-moves
18 Kf5 loss in 2 half-moves
19 Rd2 loss in 2 half-moves
20 Rd3 loss in 2 half-moves
21 Rd4 loss in 2 half-moves