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

EGTB: win in 2 half-moves

# move score
1 Rb2 win in 1 half-moves
2 Rc4 win in 1 half-moves
3 K6b6 loss in 2 half-moves
4 K7b6 loss in 2 half-moves
5 Ka5 loss in 2 half-moves
6 Ka8 loss in 2 half-moves
7 Kb5 loss in 2 half-moves
8 Ra4 loss in 2 half-moves
9 Rb1 loss in 2 half-moves
10 Rb3 loss in 2 half-moves
11 Rb5 loss in 2 half-moves
12 Rb6 loss in 2 half-moves
13 Rd4 loss in 2 half-moves
14 Re4 loss in 2 half-moves
15 Rf4 loss in 2 half-moves
16 Rg4 loss in 2 half-moves
17 Rh4 loss in 2 half-moves
18 K6b7 loss in 1 half-moves
19 K7b7 loss in 1 half-moves
20 Kb8 loss in 1 half-moves
21 Rb7 loss in 1 half-moves
22 Rb8 loss in 1 half-moves