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 Kb4 win in 7 half-moves
3 Kb5 win in 7 half-moves
4 Ka2 draw
5 Ka3 draw
6 Ka5 draw
7 Ra6 draw
8 Ra7 draw
9 Rb8 draw
10 Rc8 draw
11 Re8 draw
12 Rf8 draw
13 Kb1 loss in 2 half-moves
14 Kb2 loss in 2 half-moves
15 Kb3 loss in 2 half-moves
16 Rd8 loss in 2 half-moves
17 Rg8 loss in 2 half-moves
18 Rh8 loss in 2 half-moves