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

EGTB: win in 6 half-moves

# move score
1 Kb4 win in 5 half-moves
2 Kb3 draw
3 Kc3 draw
4 Kd3 draw
5 Kd4 draw
6 Ra1 draw
7 Ra2 draw
8 Ra3 draw
9 Ra5 draw
10 Ra6 draw
11 Kb5 loss in 2 half-moves
12 Kc5 loss in 2 half-moves
13 Kd5 loss in 2 half-moves
14 Ra7 loss in 2 half-moves
15 Ra8 loss in 2 half-moves
16 Rb4 loss in 2 half-moves