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 Ka3 draw
3 Ka4 draw
4 Ka5 draw
5 Kb3 draw
6 Kb5 draw
7 Rb6 draw
8 Rc7 draw
9 Rd7 draw
10 Rf7 draw
11 Rg7 draw
12 Rh7 draw
13 Kc3 loss in 2 half-moves
14 Kc4 loss in 2 half-moves
15 Kc5 loss in 2 half-moves
16 Ra7 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Re7 loss in 2 half-moves