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 Rb1 draw
3 Rb2 draw
4 Rb3 draw
5 Kb8 loss in 2 half-moves
6 Kc6 loss in 2 half-moves
7 Kc8 loss in 2 half-moves
8 Kcd7 loss in 2 half-moves
9 Kcd8 loss in 2 half-moves
10 Kd6 loss in 2 half-moves
11 Ke7 loss in 2 half-moves
12 Ked7 loss in 2 half-moves
13 Ked8 loss in 2 half-moves
14 Kf7 loss in 2 half-moves
15 Kf8 loss in 2 half-moves
16 Ra7 loss in 2 half-moves
17 Rb4 loss in 2 half-moves
18 Rb5 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb8 loss in 2 half-moves