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

EGTB: win in 2 half-moves

# move score
1 Rb8 win in 1 half-moves
2 Rc5 win in 1 half-moves
3 Rc4 draw
4 Ra8 loss in 6 half-moves
5 Kc7 loss in 2 half-moves
6 Kd7 loss in 2 half-moves
7 Ke7 loss in 2 half-moves
8 Ke8 loss in 2 half-moves
9 Rc1 loss in 2 half-moves
10 Rc6 loss in 2 half-moves
11 Rc7 loss in 2 half-moves
12 Rc2 loss in 1 half-moves
13 Rc3 loss in 1 half-moves