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 Rb3 win in 3 half-moves
4 Rc3 win in 3 half-moves
5 Kc2 win in 13 half-moves
6 Kc3 win in 13 half-moves
7 Ka4 win in 15 half-moves
8 Kc4 win in 15 half-moves
9 Kd2 win in 15 half-moves
10 Kd4 win in 15 half-moves
11 Ka6 draw
12 Kb6 draw
13 Ke2 draw
14 Ra1 draw
15 Ra2 draw
16 Ke3 loss in 2 half-moves
17 Ke4 loss in 2 half-moves
18 Ra4 loss in 2 half-moves