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 Kd8 draw
3 Ke7 draw
4 Kef7 draw
5 Kef8 draw
6 Kg7 draw
7 Kgf7 draw
8 Kgf8 draw
9 Kh7 draw
10 Kh8 draw
11 Rc3 draw
12 Kd7 loss in 2 half-moves
13 Ra8 loss in 2 half-moves
14 Rb8 loss in 2 half-moves
15 Rc1 loss in 2 half-moves
16 Rc2 loss in 2 half-moves
17 Rc4 loss in 2 half-moves
18 Rc5 loss in 2 half-moves
19 Rc6 loss in 2 half-moves
20 Rc7 loss in 2 half-moves