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

EGTB: win in 2 half-moves

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