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

EGTB: win in 4 half-moves

# move score
1 Rd7 win in 3 half-moves
2 K7b7 draw
3 K7b8 draw
4 K7d7 draw
5 K7d8 draw
6 K8b7 draw
7 K8b8 draw
8 K8d7 draw
9 K8d8 draw
10 Kb6 draw
11 Kc6 draw
12 Kd6 draw
13 Re7 draw
14 Rf3 draw
15 Rf4 draw
16 Rf5 draw
17 Rf6 draw
18 Rf8 draw
19 Rf1 loss in 2 half-moves
20 Rf2 loss in 2 half-moves
21 Rg7 loss in 2 half-moves
22 Rh7 loss in 2 half-moves