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 Kb5 win in 3 half-moves
3 Kb6 win in 3 half-moves
4 Kc4 win in 3 half-moves
5 Kc6 win in 3 half-moves
6 Kd4 win in 3 half-moves
7 Kd5 win in 3 half-moves
8 Kd6 win in 3 half-moves
9 Ra6 win in 3 half-moves
10 Rb5 win in 3 half-moves
11 Kf5 win in 5 half-moves
12 Kf6 win in 5 half-moves
13 Ra8 win in 9 half-moves
14 Kf7 draw
15 Kg5 draw
16 Kg7 draw
17 Kh5 draw
18 Kh6 draw
19 Kh7 draw
20 Ra3 draw
21 Ra4 draw
22 Ra7 draw
23 Ra1 loss in 2 half-moves
24 Ra2 loss in 2 half-moves