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 8 half-moves
3 Ra8 loss in 8 half-moves
4 Rb5 loss in 8 half-moves
5 Rb6 loss in 8 half-moves
6 Ka1 loss in 6 half-moves
7 Ka2 loss in 6 half-moves
8 Ka3 loss in 6 half-moves
9 Kb3 loss in 6 half-moves
10 Rh8 loss in 4 half-moves
11 Kc1 loss in 2 half-moves
12 Kc2 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Rb3 loss in 2 half-moves
15 Rb4 loss in 2 half-moves
16 Rc8 loss in 2 half-moves
17 Rd8 loss in 2 half-moves
18 Re8 loss in 2 half-moves
19 Rf8 loss in 2 half-moves
20 Rg8 loss in 1 half-moves