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

EGTB: win in 2 half-moves

# move score
1 Rb8 win in 1 half-moves
2 Ka6 loss in 2 half-moves
3 Ra6 loss in 2 half-moves
4 Ra7 loss in 2 half-moves
5 Rc8 loss in 2 half-moves
6 Rd8 loss in 2 half-moves
7 Re8 loss in 2 half-moves
8 Rf8 loss in 2 half-moves
9 Rg8 loss in 2 half-moves
10 Rh8 loss in 2 half-moves
11 Ka4 loss in 1 half-moves
12 Kb4 loss in 1 half-moves
13 Kb5 loss in 1 half-moves
14 Kb6 loss in 1 half-moves