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 Rh4 win in 1 half-moves
3 Ka4 draw
4 Ka6 loss in 10 half-moves
5 Kb5 loss in 10 half-moves
6 Ra4 loss in 10 half-moves
7 Rc4 loss in 6 half-moves
8 Rd4 loss in 6 half-moves
9 Kb6 loss in 4 half-moves
10 Rb1 loss in 2 half-moves
11 Rb2 loss in 2 half-moves
12 Rb3 loss in 2 half-moves
13 Rb5 loss in 2 half-moves
14 Rb6 loss in 2 half-moves
15 Rb7 loss in 2 half-moves
16 Re4 loss in 2 half-moves
17 Rf4 loss in 2 half-moves
18 Rg4 loss in 2 half-moves