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 Kc1 draw
5 Kc2 draw
6 Kc5 draw
7 Kd2 draw
8 Kd5 draw
9 Kd6 draw
10 Kd7 draw
11 Ke1 draw
12 Ra7 draw
13 Rb7 draw
14 Rc8 draw
15 Rd7 draw
16 Re7 draw
17 Rf7 draw
18 Ke2 loss in 2 half-moves
19 Rg7 loss in 2 half-moves
20 Rh7 loss in 2 half-moves