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 Kc4 win in 3 half-moves
3 Kd4 win in 3 half-moves
4 Ra1 win in 3 half-moves
5 Ra3 win in 3 half-moves
6 Ra4 win in 3 half-moves
7 Kb1 draw
8 Kb2 draw
9 Kb3 draw
10 Kb5 draw
11 Kc1 draw
12 Kc3 draw
13 Kd1 draw
14 Kd2 draw
15 Kd3 draw
16 Kd5 draw
17 Ra2 draw
18 Kb6 loss in 2 half-moves
19 Kc6 loss in 2 half-moves
20 Kd6 loss in 2 half-moves
21 Ra6 loss in 2 half-moves
22 Ra7 loss in 2 half-moves
23 Ra8 loss in 2 half-moves
24 Rb5 loss in 2 half-moves