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

EGTB: win in 2 half-moves

# move score
1 Rb1 win in 1 half-moves
2 Rb3 win in 1 half-moves
3 Rb4 win in 1 half-moves
4 Rb5 win in 1 half-moves
5 Rb7 win in 1 half-moves
6 Kb7 draw
7 Ra8 draw
8 Kc7 loss in 1 half-moves
9 Kd7 loss in 1 half-moves
10 Kd8 loss in 1 half-moves
11 Rb2 loss in 1 half-moves
12 Rb6 loss in 1 half-moves