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

EGTB: win in 4 half-moves

# move score
1 Ra5 win in 3 half-moves
2 Rd8 draw
3 Re8 draw
4 Rf8 draw
5 Rg8 draw
6 Kaa3 loss in 2 half-moves
7 Kaa5 loss in 2 half-moves
8 Kab3 loss in 2 half-moves
9 Kab5 loss in 2 half-moves
10 Kba3 loss in 2 half-moves
11 Kba5 loss in 2 half-moves
12 Kbb3 loss in 2 half-moves
13 Kbb5 loss in 2 half-moves
14 Kc3 loss in 2 half-moves
15 Kc4 loss in 2 half-moves
16 Kc5 loss in 2 half-moves
17 Ra6 loss in 2 half-moves
18 Ra7 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc8 loss in 2 half-moves
21 Rh8 loss in 2 half-moves