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 draw
3 Ka7 draw
4 Kc6 draw
5 Kc7 draw
6 Ra7 draw
7 Rd7 draw
8 Re7 draw
9 Rf7 draw
10 Rg7 draw
11 Rh7 draw
12 Ka5 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Kc5 loss in 2 half-moves
15 Rc7 loss in 2 half-moves