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 Ra5 draw
3 Rb1 draw
4 Rb2 draw
5 Kb6 loss in 2 half-moves
6 Kc4 loss in 2 half-moves
7 Kc7 loss in 2 half-moves
8 Kcc6 loss in 2 half-moves
9 Kcd5 loss in 2 half-moves
10 Kd4 loss in 2 half-moves
11 Kd7 loss in 2 half-moves
12 Kdc6 loss in 2 half-moves
13 Kdd5 loss in 2 half-moves
14 Ke5 loss in 2 half-moves
15 Ke6 loss in 2 half-moves
16 Ke7 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rb4 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb7 loss in 2 half-moves
21 Rb8 loss in 2 half-moves