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

EGTB: win in 4 half-moves

# move score
1 Kab5 win in 3 half-moves
2 Kb4 win in 3 half-moves
3 Rc8 win in 3 half-moves
4 Kb7 win in 5 half-moves
5 Ka7 win in 7 half-moves
6 Kc7 win in 7 half-moves
7 Kc6 win in 13 half-moves
8 Ka4 draw
9 Kaa6 draw
10 Kba6 draw
11 Kbb5 draw
12 Kc5 draw
13 Ra6 draw
14 Ra7 draw
15 Rb8 draw
16 Rd8 draw
17 Re8 draw
18 Rf8 draw
19 Rg8 loss in 2 half-moves
20 Rh8 loss in 2 half-moves