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

EGTB: win in 6 half-moves

# move score
1 Kb6 win in 5 half-moves
2 Ka3 draw
3 Ka6 draw
4 Kaa4 draw
5 Kab5 draw
6 Kb3 draw
7 Kba4 draw
8 Kbb5 draw
9 Ra7 draw
10 Rb8 draw
11 Rg8 draw
12 Rh8 draw
13 Kc3 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Kc5 loss in 2 half-moves
16 Ra6 loss in 2 half-moves
17 Rc8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re8 loss in 2 half-moves
20 Rf8 loss in 2 half-moves