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

EGTB: win in 2 half-moves

# move score
1 Rb5 win in 1 half-moves
2 Kb3 loss in 10 half-moves
3 Rb4 loss in 10 half-moves
4 Kb1 loss in 8 half-moves
5 Ra8 loss in 8 half-moves
6 Rb6 loss in 8 half-moves
7 Rb7 loss in 8 half-moves
8 Rc8 loss in 8 half-moves
9 Ka1 loss in 6 half-moves
10 Ka2 loss in 6 half-moves
11 Ka3 loss in 6 half-moves
12 Kc1 loss in 2 half-moves
13 Kc2 loss in 2 half-moves
14 Kc3 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rd8 loss in 2 half-moves
17 Re8 loss in 2 half-moves
18 Rf8 loss in 2 half-moves
19 Rg8 loss in 2 half-moves
20 Rh8 loss in 1 half-moves