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

EGTB: win in 2 half-moves

# move score
1 Rb5 win in 1 half-moves
2 Ka7 draw
3 Ka8 draw
4 Kb7 draw
5 Kc1 draw
6 Kc7 draw
7 Kc8 draw
8 Ke1 draw
9 Ra1 draw
10 Rc1 draw
11 Kc2 loss in 2 half-moves
12 Kd2 loss in 2 half-moves
13 Ke2 loss in 2 half-moves
14 Rb2 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves