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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Ka4 draw
3 Kb6 draw
4 Kc7 draw
5 Kc8 draw
6 Ke8 draw
7 Ra1 draw
8 Ra2 draw
9 Rb3 draw
10 Kb4 loss in 2 half-moves
11 Kd7 loss in 2 half-moves
12 Ke7 loss in 2 half-moves
13 Ra4 loss in 2 half-moves
14 Rc3 loss in 2 half-moves
15 Rd3 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Rf3 loss in 2 half-moves
18 Rg3 loss in 2 half-moves
19 Rh3 loss in 2 half-moves
20 Ka6 loss in 1 half-moves