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 Ra6 draw
3 Rc7 draw
4 Rd7 draw
5 Re7 draw
6 Rf7 draw
7 Ka2 loss in 2 half-moves
8 Ka5 loss in 2 half-moves
9 Kaa3 loss in 2 half-moves
10 Kab4 loss in 2 half-moves
11 Kb2 loss in 2 half-moves
12 Kb5 loss in 2 half-moves
13 Kba3 loss in 2 half-moves
14 Kbb4 loss in 2 half-moves
15 Kc2 loss in 2 half-moves
16 Kc3 loss in 2 half-moves
17 Kc4 loss in 2 half-moves
18 Ra8 loss in 2 half-moves
19 Rb7 loss in 2 half-moves
20 Rg7 loss in 2 half-moves
21 Rh7 loss in 2 half-moves