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 Rb5 draw
5 Rc8 draw
6 Kd7 loss in 2 half-moves
7 Kd8 loss in 2 half-moves
8 Kee7 loss in 2 half-moves
9 Kef7 loss in 2 half-moves
10 Kfe7 loss in 2 half-moves
11 Kff7 loss in 2 half-moves
12 Kg7 loss in 2 half-moves
13 Kg8 loss in 2 half-moves
14 Ra8 loss in 2 half-moves
15 Rb3 loss in 2 half-moves
16 Rb4 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves