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

EGTB: win in 4 half-moves

# move score
1 Kf3 win in 3 half-moves
2 Rf7 draw
3 Rf8 draw
4 Kc1 loss in 2 half-moves
5 Kc2 loss in 2 half-moves
6 Kd3 loss in 2 half-moves
7 Kdd2 loss in 2 half-moves
8 Kde1 loss in 2 half-moves
9 Ke3 loss in 2 half-moves
10 Ked2 loss in 2 half-moves
11 Kee1 loss in 2 half-moves
12 Kf1 loss in 2 half-moves
13 Rf1 loss in 2 half-moves
14 Rf3 loss in 2 half-moves
15 Rf4 loss in 2 half-moves
16 Rf5 loss in 2 half-moves
17 Rf6 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rh2 loss in 2 half-moves