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 Kef8 draw
3 Rb1 draw
4 Rb2 draw
5 Rb3 draw
6 Rc8 draw
7 Kd7 loss in 2 half-moves
8 Kd8 loss in 2 half-moves
9 Ke7 loss in 2 half-moves
10 Kg7 loss in 2 half-moves
11 Kh7 loss in 2 half-moves
12 Kh8 loss in 2 half-moves
13 Ra8 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rb7 loss in 2 half-moves
18 Kef7 loss in 1 half-moves
19 Kgf7 loss in 1 half-moves
20 Kgf8 loss in 1 half-moves