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

EGTB: draw

# move score
1 Kb7 draw
2 Kb8 draw
3 Ra2 draw
4 Ra4 draw
5 Ra5 draw
6 Ra6 draw
7 Rb7 draw
8 Rc7 draw
9 Rd7 draw
10 Re7 draw
11 Ra1 loss in 2 half-moves
12 Ra3 loss in 2 half-moves
13 Rf7 loss in 2 half-moves
14 Rg7 loss in 2 half-moves
15 Rh7 loss in 2 half-moves