Click on the third or sixth rank to set the en passant target square.

EGTB: win in 2 half-moves

# move score
1 Rb7 win in 1 half-moves
2 Kb1 loss in 10 half-moves
3 Kb3 loss in 10 half-moves
4 Kc1 loss in 10 half-moves
5 Kc2 loss in 10 half-moves
6 Kc3 loss in 10 half-moves
7 Ra6 loss in 10 half-moves
8 Rb8 loss in 10 half-moves
9 Rc6 loss in 8 half-moves
10 Ka1 loss in 6 half-moves
11 Ka2 loss in 6 half-moves
12 Ka3 loss in 6 half-moves
13 Rd6 loss in 4 half-moves
14 Rb3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Re6 loss in 2 half-moves
18 Rf6 loss in 2 half-moves
19 Rg6 loss in 2 half-moves
20 Rh6 loss in 1 half-moves