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 Kb6 win in 3 half-moves
4 Ka4 draw
5 Ka6 draw
6 Kc3 draw
7 Kc4 draw
8 Kc5 draw
9 Kd3 draw
10 Kd5 draw
11 Ra8 draw
12 Rb7 draw
13 Rc7 draw
14 Rd7 draw
15 Ke3 loss in 2 half-moves
16 Ke4 loss in 2 half-moves
17 Ke5 loss in 2 half-moves
18 Ra6 loss in 2 half-moves
19 Re7 loss in 2 half-moves
20 Rf7 loss in 2 half-moves
21 Rg7 loss in 2 half-moves
22 Rh7 loss in 2 half-moves