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

EGTB: win in 2 half-moves

# move score
1 Rb1 win in 1 half-moves
2 Kc7 loss in 10 half-moves
3 Rb6 loss in 10 half-moves
4 Rb8 loss in 10 half-moves
5 Kb5 loss in 8 half-moves
6 Ra7 loss in 8 half-moves
7 Rh7 loss in 8 half-moves
8 Kb6 loss in 6 half-moves
9 Rc7 loss in 6 half-moves
10 Kd7 loss in 4 half-moves
11 Kc5 loss in 2 half-moves
12 Kd5 loss in 2 half-moves
13 Kd6 loss in 2 half-moves
14 Rb2 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb5 loss in 2 half-moves
18 Rd7 loss in 2 half-moves
19 Re7 loss in 2 half-moves
20 Rf7 loss in 2 half-moves
21 Rg7 loss in 2 half-moves