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

EGTB: draw

# move score
1 Ka7 draw
2 Kb5 draw
3 Kb6 draw
4 Kb7 draw
5 Ra7 draw
6 Rb8 draw
7 Ka5 loss in 4 half-moves
8 Rc8 loss in 4 half-moves
9 Re8 loss in 4 half-moves
10 Rf8 loss in 2 half-moves
11 Rg8 loss in 2 half-moves
12 Rh8 loss in 2 half-moves
13 Rd8 loss in 1 half-moves