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 K3b3 draw
3 K3b4 draw
4 K4b3 draw
5 K4b4 draw
6 Kb5 draw
7 Kc2 draw
8 Kc5 draw
9 Ra8 draw
10 Rc6 draw
11 Rc7 draw
12 Rh8 draw
13 K3d3 loss in 2 half-moves
14 K3d4 loss in 2 half-moves
15 K4d3 loss in 2 half-moves
16 K4d4 loss in 2 half-moves
17 Kb2 loss in 2 half-moves
18 Kd2 loss in 2 half-moves
19 Kd5 loss in 2 half-moves
20 Rc5 loss in 2 half-moves
21 Rd8 loss in 2 half-moves
22 Re8 loss in 2 half-moves
23 Rf8 loss in 2 half-moves
24 Rg8 loss in 2 half-moves