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 Kb3 win in 7 half-moves
3 Kc4 win in 7 half-moves
4 Rb6 win in 7 half-moves
5 Kc6 win in 9 half-moves
6 Kb2 draw
7 Kc2 draw
8 Kd2 draw
9 Kd3 draw
10 Kd4 draw
11 Ra1 draw
12 Ra3 draw
13 Rc6 draw
14 Kc5 loss in 2 half-moves
15 Kc7 loss in 2 half-moves
16 Kd5 loss in 2 half-moves
17 Kd7 loss in 2 half-moves
18 Ke5 loss in 2 half-moves
19 Ke6 loss in 2 half-moves
20 Ke7 loss in 2 half-moves
21 Ra2 loss in 2 half-moves
22 Ra4 loss in 2 half-moves
23 Ra5 loss in 2 half-moves
24 Ra7 loss in 2 half-moves
25 Ra8 loss in 2 half-moves