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

EGTB: win in 2 half-moves

# move score
1 Rb4 win in 1 half-moves
2 Kb6 loss in 8 half-moves
3 Kb8 loss in 8 half-moves
4 Ra3 loss in 8 half-moves
5 Rb1 loss in 8 half-moves
6 Rb2 loss in 8 half-moves
7 Ka6 loss in 6 half-moves
8 Ka7 loss in 6 half-moves
9 Ka8 loss in 6 half-moves
10 Rg3 loss in 4 half-moves
11 Kc6 loss in 2 half-moves
12 Kc7 loss in 2 half-moves
13 Kc8 loss in 2 half-moves
14 Rb5 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rc3 loss in 2 half-moves
17 Rd3 loss in 2 half-moves
18 Re3 loss in 2 half-moves
19 Rf3 loss in 2 half-moves
20 Rh3 loss in 1 half-moves