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

EGTB: win in 4 half-moves

# move score
1 Rd8 win in 3 half-moves
2 Rb1 draw
3 Rb2 draw
4 Rb3 draw
5 Rb4 draw
6 Rc8 draw
7 Kd7 loss in 2 half-moves
8 Kd8 loss in 2 half-moves
9 Kee7 loss in 2 half-moves
10 Kef7 loss in 2 half-moves
11 Kfe7 loss in 2 half-moves
12 Kff7 loss in 2 half-moves
13 Kg7 loss in 2 half-moves
14 Kg8 loss in 2 half-moves
15 Ra8 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves