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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Ra7 draw
3 Ra8 draw
4 Rb6 draw
5 Kb5 loss in 2 half-moves
6 Kb8 loss in 2 half-moves
7 Kc5 loss in 2 half-moves
8 Kd5 loss in 2 half-moves
9 Kd6 loss in 2 half-moves
10 Kd8 loss in 2 half-moves
11 Ra1 loss in 2 half-moves
12 Ra2 loss in 2 half-moves
13 Ra3 loss in 2 half-moves
14 Ra4 loss in 2 half-moves
15 Ra5 loss in 2 half-moves
16 K6b7 loss in 1 half-moves
17 K6c7 loss in 1 half-moves
18 K6d7 loss in 1 half-moves
19 K8b7 loss in 1 half-moves
20 K8c7 loss in 1 half-moves
21 K8d7 loss in 1 half-moves