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 Rb1 loss in 16 half-moves
3 Rb3 loss in 16 half-moves
4 Rb4 loss in 16 half-moves
5 Rb2 loss in 10 half-moves
6 Kb2 loss in 2 half-moves
7 Kb3 loss in 2 half-moves
8 Kb4 loss in 2 half-moves
9 Kc2 loss in 2 half-moves
10 Kc4 loss in 2 half-moves
11 Kd2 loss in 2 half-moves
12 Kd3 loss in 2 half-moves
13 Kd4 loss in 2 half-moves
14 Ra7 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rc7 loss in 2 half-moves
18 Rg7 loss in 2 half-moves
19 Rd7 loss in 1 half-moves
20 Re7 loss in 1 half-moves
21 Rf7 loss in 1 half-moves
22 Rh7 loss in 1 half-moves