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

EGTB: draw

# move score
1 Rb2 draw
2 Rb3 draw
3 Rb4 draw
4 Rb5 draw
5 Kd1 loss in 2 half-moves
6 Ra1 loss in 2 half-moves
7 Rb6 loss in 2 half-moves
8 Rb7 loss in 2 half-moves
9 Rb8 loss in 2 half-moves
10 Kb2 loss in 1 half-moves
11 Kc2 loss in 1 half-moves
12 Kd2 loss in 1 half-moves