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 Kb5 win in 3 half-moves
3 Kb6 win in 3 half-moves
4 Ra4 win in 3 half-moves
5 Rb5 win in 3 half-moves
6 Kcc6 win in 5 half-moves
7 Kdc6 win in 5 half-moves
8 Kdd6 win in 5 half-moves
9 Kcd6 win in 9 half-moves
10 Kcc4 draw
11 Kcd4 draw
12 Kdc4 draw
13 Kdd4 draw
14 Ra1 draw
15 Ra2 draw
16 Ra3 draw
17 Ra8 draw
18 Ke4 loss in 2 half-moves
19 Ke5 loss in 2 half-moves
20 Ke6 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra7 loss in 2 half-moves