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 Rb5 win in 7 half-moves
3 Kb6 win in 9 half-moves
4 K5b5 draw
5 Kc6 draw
6 Ra4 draw
7 K4b5 loss in 2 half-moves
8 K4d4 loss in 2 half-moves
9 K4d5 loss in 2 half-moves
10 K5d4 loss in 2 half-moves
11 K5d5 loss in 2 half-moves
12 Kb3 loss in 2 half-moves
13 Kc3 loss in 2 half-moves
14 Kd3 loss in 2 half-moves
15 Kd6 loss in 2 half-moves
16 Rb1 loss in 2 half-moves
17 Rb2 loss in 2 half-moves
18 Rb3 loss in 2 half-moves
19 Rb6 loss in 2 half-moves
20 Rb7 loss in 2 half-moves