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

EGTB: win in 4 half-moves

# move score
1 Kb5 win in 3 half-moves
2 Ra6 draw
3 Rb1 draw
4 Rb2 draw
5 Kb7 loss in 2 half-moves
6 Kc4 loss in 2 half-moves
7 Kc7 loss in 2 half-moves
8 Kcc5 loss in 2 half-moves
9 Kcd6 loss in 2 half-moves
10 Kd4 loss in 2 half-moves
11 Kd7 loss in 2 half-moves
12 Kdc5 loss in 2 half-moves
13 Kdd6 loss in 2 half-moves
14 Ke4 loss in 2 half-moves
15 Ke5 loss in 2 half-moves
16 Ke6 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rb4 loss in 2 half-moves
19 Rb5 loss in 2 half-moves
20 Rb7 loss in 2 half-moves
21 Rb8 loss in 2 half-moves