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

EGTB: win in 4 half-moves

# move score
1 Kab6 win in 3 half-moves
2 Kab7 win in 3 half-moves
3 Kcb6 win in 7 half-moves
4 Kd6 win in 7 half-moves
5 Kd7 win in 7 half-moves
6 Ka5 win in 9 half-moves
7 Kc7 win in 9 half-moves
8 Kcb7 draw
9 Ra8 draw
10 Rb7 draw
11 Rc7 draw
12 Rf7 draw
13 Rg7 draw
14 Rh7 draw
15 Kab5 loss in 2 half-moves
16 Kc5 loss in 2 half-moves
17 Kcb5 loss in 2 half-moves
18 Kd5 loss in 2 half-moves
19 Rd7 loss in 2 half-moves
20 Re7 loss in 2 half-moves