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 Ka3 draw
3 Ka4 draw
4 Ka5 draw
5 Kb3 draw
6 Kc7 draw
7 Kc8 draw
8 Kd7 draw
9 Ke7 draw
10 Ke8 draw
11 Ra6 draw
12 Rb5 draw
13 Rb7 draw
14 Rb8 draw
15 Rc6 draw
16 Rg6 draw
17 Kc3 loss in 2 half-moves
18 Kc4 loss in 2 half-moves
19 Kc5 loss in 2 half-moves
20 Rd6 loss in 2 half-moves
21 Re6 loss in 2 half-moves
22 Rf6 loss in 2 half-moves
23 Rh6 loss in 2 half-moves