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 Rd7 draw
3 Re7 draw
4 Rf7 draw
5 Ka3 loss in 2 half-moves
6 Ka6 loss in 2 half-moves
7 Kaa4 loss in 2 half-moves
8 Kab5 loss in 2 half-moves
9 Kb3 loss in 2 half-moves
10 Kb6 loss in 2 half-moves
11 Kba4 loss in 2 half-moves
12 Kbb5 loss in 2 half-moves
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 Rb6 loss in 2 half-moves
19 Rc7 loss in 2 half-moves
20 Rg7 loss in 2 half-moves
21 Rh7 loss in 2 half-moves