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 Rg7 draw
3 Ka4 loss in 2 half-moves
4 Ka5 loss in 2 half-moves
5 Ka6 loss in 2 half-moves
6 Kbb4 loss in 2 half-moves
7 Kbb6 loss in 2 half-moves
8 Kbc4 loss in 2 half-moves
9 Kbc6 loss in 2 half-moves
10 Kcb4 loss in 2 half-moves
11 Kcb6 loss in 2 half-moves
12 Kcc4 loss in 2 half-moves
13 Kcc6 loss in 2 half-moves
14 Kd4 loss in 2 half-moves
15 Kd5 loss in 2 half-moves
16 Kd6 loss in 2 half-moves
17 Ra7 loss in 2 half-moves
18 Rb6 loss in 2 half-moves
19 Rc7 loss in 2 half-moves
20 Rd7 loss in 2 half-moves
21 Re7 loss in 2 half-moves
22 Rf7 loss in 2 half-moves
23 Rh7 loss in 2 half-moves