Click on the third or sixth rank to set the en passant target square.

EGTB: win in 4 half-moves

# move score
1 Kb7 win in 3 half-moves
2 Kb8 win in 3 half-moves
3 Kc3 win in 3 half-moves
4 Kc4 win in 3 half-moves
5 Ka7 win in 5 half-moves
6 Rc3 win in 5 half-moves
7 Ra3 win in 7 half-moves
8 Kc2 draw
9 Kd2 draw
10 Kd4 draw
11 Ke2 draw
12 Ke3 draw
13 Rb1 draw
14 Rb2 draw
15 Rb4 draw
16 Rb5 draw
17 Ke4 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rb7 loss in 2 half-moves
20 Rb8 loss in 2 half-moves