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 Rh8 draw
6 Ka1 loss in 2 half-moves
7 Ka2 loss in 2 half-moves
8 Ka5 loss in 2 half-moves
9 Kaa3 loss in 2 half-moves
10 Kab3 loss in 2 half-moves
11 Kb1 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Kba3 loss in 2 half-moves
15 Kbb3 loss in 2 half-moves
16 Kc1 loss in 2 half-moves
17 Kc2 loss in 2 half-moves
18 Kc3 loss in 2 half-moves
19 Ra6 loss in 2 half-moves
20 Ra7 loss in 2 half-moves
21 Rb8 loss in 2 half-moves
22 Rc8 loss in 2 half-moves
23 Rg8 loss in 2 half-moves