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

EGTB: win in 4 half-moves

# move score
1 Kf7 win in 3 half-moves
2 Kf8 win in 3 half-moves
3 Rf7 win in 5 half-moves
4 Kgg7 draw
5 Kgh7 draw
6 Khg7 draw
7 Khh7 draw
8 Ra7 draw
9 Rb7 draw
10 Rc7 draw
11 Rd7 draw
12 Re1 draw
13 Re6 draw
14 Re8 draw
15 Re2 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Re4 loss in 2 half-moves
18 Re5 loss in 2 half-moves
19 Rg7 loss in 2 half-moves
20 Rh7 loss in 2 half-moves