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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Kc1 win in 3 half-moves
3 Kc2 win in 3 half-moves
4 Kb5 win in 5 half-moves
5 Ka5 draw
6 Kb7 draw
7 Kd2 draw
8 Ra8 draw
9 Rb7 draw
10 Rc7 draw
11 Rd7 draw
12 Re7 draw
13 Rf7 draw
14 Ke1 loss in 2 half-moves
15 Ke2 loss in 2 half-moves
16 Rg7 loss in 2 half-moves
17 Rh7 loss in 2 half-moves