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

EGTB: win in 2 half-moves

# move score
1 Rb6 win in 1 half-moves
2 Kb1 draw
3 Kb3 draw
4 Kb7 draw
5 Kb8 draw
6 Kc1 draw
7 Kc3 draw
8 Kd1 draw
9 Kd8 draw
10 Ra2 draw
11 Rb1 draw
12 Rb8 draw
13 Kc7 loss in 2 half-moves
14 Kd2 loss in 2 half-moves
15 Kd3 loss in 2 half-moves
16 Kd7 loss in 2 half-moves
17 Rb3 loss in 2 half-moves
18 Rb4 loss in 2 half-moves
19 Rb5 loss in 2 half-moves
20 Rb7 loss in 2 half-moves