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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kb7 win in 3 half-moves
3 Kb8 win in 3 half-moves
4 Rb7 win in 3 half-moves
5 Ra8 win in 7 half-moves
6 Kcc6 win in 9 half-moves
7 Kdc6 win in 9 half-moves
8 Kcc8 draw
9 Kcd6 draw
10 Kcd8 draw
11 Kdc8 draw
12 Kdd6 draw
13 Kdd8 draw
14 Ke6 draw
15 Ke7 draw
16 Ke8 draw
17 Ra2 draw
18 Ra1 loss in 2 half-moves
19 Ra3 loss in 2 half-moves
20 Ra4 loss in 2 half-moves
21 Ra5 loss in 2 half-moves
22 Ra6 loss in 2 half-moves