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 Kb6 win in 3 half-moves
3 Kb7 win in 3 half-moves
4 Rc7 win in 3 half-moves
5 Kc5 win in 7 half-moves
6 Kc6 win in 7 half-moves
7 Ke6 win in 7 half-moves
8 Rd7 win in 7 half-moves
9 Ke7 win in 9 half-moves
10 Kd7 win in 15 half-moves
11 Kc7 win in 21 half-moves
12 Ka5 draw
13 Ra8 draw
14 Rb7 draw
15 Rh7 draw
16 Kd5 loss in 2 half-moves
17 Ke5 loss in 2 half-moves
18 Re7 loss in 2 half-moves
19 Rf7 loss in 2 half-moves
20 Rg7 loss in 2 half-moves