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 Kd7 loss in 2 half-moves
3 Kd8 loss in 2 half-moves
4 Ke7 loss in 2 half-moves
5 Kf7 loss in 2 half-moves
6 Kf8 loss in 2 half-moves
7 Ra8 loss in 2 half-moves
8 Rc1 loss in 2 half-moves
9 Rc2 loss in 2 half-moves
10 Rc3 loss in 2 half-moves
11 Rc6 loss in 2 half-moves
12 Rc7 loss in 2 half-moves
13 Rd8 loss in 2 half-moves
14 Rc4 loss in 1 half-moves
15 Rc5 loss in 1 half-moves