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 Kb7 win in 5 half-moves
3 K5b6 win in 7 half-moves
4 K5c6 win in 7 half-moves
5 Kb5 win in 7 half-moves
6 Kb8 win in 7 half-moves
7 Ra8 win in 11 half-moves
8 K7b6 draw
9 K7c6 draw
10 Kb4 draw
11 Kd8 draw
12 Rh8 draw
13 K5d6 loss in 2 half-moves
14 K7d6 loss in 2 half-moves
15 Kc4 loss in 2 half-moves
16 Kd4 loss in 2 half-moves
17 Kd5 loss in 2 half-moves
18 Kd7 loss in 2 half-moves
19 Rd8 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf8 loss in 2 half-moves
22 Rg8 loss in 2 half-moves