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 Kb2 draw
3 Kb3 draw
4 Kc4 draw
5 Kc7 draw
6 Kc8 draw
7 Kd2 draw
8 Kd3 draw
9 Kd4 draw
10 Kd7 draw
11 Ke8 draw
12 Ra2 draw
13 Rb2 draw
14 Rc1 draw
15 Rd2 draw
16 Re2 draw
17 Rf2 draw
18 Ke7 loss in 2 half-moves
19 Rg2 loss in 2 half-moves
20 Rh2 loss in 2 half-moves