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

EGTB: win in 4 half-moves

# move score
1 Rf4 win in 3 half-moves
2 Rf2 draw
3 Rf3 draw
4 Rf5 draw
5 Rf6 draw
6 Rf7 draw
7 Rf8 draw
8 Kd1 loss in 2 half-moves
9 Rg1 loss in 2 half-moves
10 Rh1 loss in 2 half-moves
11 Kd2 loss in 1 half-moves
12 Ke2 loss in 1 half-moves
13 Kf2 loss in 1 half-moves