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

EGTB: win in 4 half-moves

# move score
1 Rd7 win in 3 half-moves
2 Rf1 draw
3 Kc5 loss in 2 half-moves
4 Kc6 loss in 2 half-moves
5 Kc7 loss in 2 half-moves
6 Kd5 loss in 2 half-moves
7 Kd7 loss in 2 half-moves
8 Ke5 loss in 2 half-moves
9 Ke6 loss in 2 half-moves
10 Ke7 loss in 2 half-moves
11 Ra7 loss in 2 half-moves
12 Rb7 loss in 2 half-moves
13 Rc7 loss in 2 half-moves
14 Re7 loss in 2 half-moves
15 Rf2 loss in 2 half-moves
16 Rf3 loss in 2 half-moves
17 Rf4 loss in 2 half-moves
18 Rf5 loss in 2 half-moves
19 Rf6 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg7 loss in 2 half-moves
22 Rh7 loss in 2 half-moves