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

EGTB: win in 4 half-moves

# move score
1 Rf5 win in 3 half-moves
2 Rf8 win in 3 half-moves
3 Rf1 win in 5 half-moves
4 Rf2 win in 5 half-moves
5 Rh4 loss in 8 half-moves
6 Rg4 loss in 6 half-moves
7 Kd3 loss in 2 half-moves
8 Kd4 loss in 2 half-moves
9 Kd5 loss in 2 half-moves
10 Ke3 loss in 2 half-moves
11 Ke5 loss in 2 half-moves
12 Kf3 loss in 2 half-moves
13 Kf5 loss in 2 half-moves
14 Rf3 loss in 2 half-moves
15 Rf6 loss in 2 half-moves
16 Rf7 loss in 2 half-moves