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 Kdd5 win in 7 half-moves
3 Rd8 win in 7 half-moves
4 Kb6 draw
5 Kc7 draw
6 Kcc6 draw
7 Kcd5 draw
8 Ke6 draw
9 Ke7 draw
10 Rc7 draw
11 Kb4 loss in 2 half-moves
12 Kc4 loss in 2 half-moves
13 Kd4 loss in 2 half-moves
14 Kdc6 loss in 2 half-moves
15 Ke5 loss in 2 half-moves
16 Ra7 loss in 2 half-moves
17 Rb7 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
21 Rh7 loss in 2 half-moves