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 Kc3 loss in 22 half-moves
3 Rb2 loss in 22 half-moves
4 Rb3 loss in 16 half-moves
5 Kc1 loss in 8 half-moves
6 Kd2 loss in 8 half-moves
7 Ra1 loss in 8 half-moves
8 Kb2 loss in 6 half-moves
9 Rc1 loss in 6 half-moves
10 Kb3 loss in 4 half-moves
11 Kd1 loss in 4 half-moves
12 Kd3 loss in 4 half-moves
13 Rb4 loss in 2 half-moves
14 Rb5 loss in 2 half-moves
15 Rb6 loss in 2 half-moves
16 Rb7 loss in 2 half-moves
17 Rd1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rf1 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rh1 loss in 2 half-moves