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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 K5b6 draw
3 K7b6 draw
4 Ra5 draw
5 Rb1 draw
6 Rb2 draw
7 Rb6 draw
8 Rb7 draw
9 Kb4 loss in 2 half-moves
10 Kb7 loss in 2 half-moves
11 Kb8 loss in 2 half-moves
12 Kc4 loss in 2 half-moves
13 Kc8 loss in 2 half-moves
14 Kd4 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kd7 loss in 2 half-moves
17 Kd8 loss in 2 half-moves
18 Rb3 loss in 2 half-moves
19 Rb4 loss in 2 half-moves
20 K5c6 loss in 1 half-moves
21 K5d6 loss in 1 half-moves
22 K7c6 loss in 1 half-moves
23 K7d6 loss in 1 half-moves