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 Kcd4 win in 3 half-moves
4 Kd5 win in 3 half-moves
5 Rb3 win in 3 half-moves
6 Kd2 win in 7 half-moves
7 Kdd4 win in 7 half-moves
8 Kb3 draw
9 Kc2 draw
10 Kc5 draw
11 Ke2 draw
12 Ra3 draw
13 Rc1 draw
14 Rc2 draw
15 Ke3 loss in 2 half-moves
16 Ke4 loss in 2 half-moves