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

EGTB: win in 4 half-moves

# move score
1 Re8 win in 3 half-moves
2 Kd5 win in 5 half-moves
3 Rf6 win in 5 half-moves
4 Rf7 win in 5 half-moves
5 Kd7 draw
6 Ke5 draw
7 Ke6 draw
8 Ke7 draw
9 Rd8 draw
10 Rf1 draw
11 Rf2 draw
12 Rf3 draw
13 Rg8 draw
14 Rh8 draw
15 Kc5 loss in 2 half-moves
16 Kc6 loss in 2 half-moves
17 Kc7 loss in 2 half-moves
18 Ra8 loss in 2 half-moves
19 Rb8 loss in 2 half-moves
20 Rc8 loss in 2 half-moves
21 Rf4 loss in 2 half-moves
22 Rf5 loss in 2 half-moves