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 Kc5 win in 3 half-moves
3 Kc6 win in 3 half-moves
4 Kb3 win in 7 half-moves
5 Kb5 win in 7 half-moves
6 Rb3 win in 7 half-moves
7 Rc3 win in 7 half-moves
8 Ka5 draw
9 Kc4 draw
10 Kd6 draw
11 Ke5 draw
12 Ke6 draw
13 Rh3 draw
14 Kd4 loss in 2 half-moves
15 Ke4 loss in 2 half-moves
16 Ra1 loss in 2 half-moves
17 Ra2 loss in 2 half-moves
18 Rd3 loss in 2 half-moves
19 Re3 loss in 2 half-moves
20 Rf3 loss in 2 half-moves
21 Rg3 loss in 2 half-moves