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

EGTB: win in 6 half-moves

# move score
1 Kb5 win in 5 half-moves
2 K6b7 draw
3 K8b7 draw
4 Ra8 draw
5 Rb1 draw
6 Rb2 draw
7 Rb7 draw
8 Kb6 loss in 2 half-moves
9 Kc5 loss in 2 half-moves
10 Kd5 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kd8 loss in 2 half-moves
13 Rb3 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 K6c7 loss in 1 half-moves
18 K6d7 loss in 1 half-moves
19 K8c7 loss in 1 half-moves
20 K8d7 loss in 1 half-moves