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 Kc6 draw
3 Kc7 draw
4 Kc8 draw
5 Kd6 draw
6 Ke6 draw
7 Ke7 draw
8 Ke8 draw
9 Rc8 draw
10 Re8 draw
11 Rh8 draw
12 Ra8 loss in 20 half-moves
13 Rf8 loss in 2 half-moves
14 Rg8 loss in 2 half-moves