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 Kb7 win in 3 half-moves
3 Rb2 win in 3 half-moves
4 Kb3 win in 5 half-moves
5 Kb6 win in 5 half-moves
6 Rc2 win in 5 half-moves
7 Kb5 win in 7 half-moves
8 Kc5 win in 7 half-moves
9 Ka4 draw
10 Kb2 draw
11 Kc7 draw
12 Kd5 draw
13 Kd6 draw
14 Ra1 draw
15 Rd2 draw
16 Re2 draw
17 Kd7 loss in 2 half-moves
18 Rf2 loss in 2 half-moves
19 Rg2 loss in 2 half-moves
20 Rh2 loss in 2 half-moves