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

EGTB: win in 2 half-moves

# move score
1 Kb5 win in 1 half-moves
2 Rb1 win in 1 half-moves
3 Rb6 win in 1 half-moves
4 Rb5 draw
5 Kb3 loss in 2 half-moves
6 Kc3 loss in 2 half-moves
7 Kc5 loss in 2 half-moves
8 Kd3 loss in 2 half-moves
9 Kd4 loss in 2 half-moves
10 Kd5 loss in 2 half-moves
11 Ra4 loss in 2 half-moves
12 Rb2 loss in 2 half-moves
13 Rb3 loss in 2 half-moves
14 Rb8 loss in 2 half-moves
15 Rb7 loss in 1 half-moves