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

EGTB: win in 4 half-moves

# move score
1 Re2 win in 3 half-moves
2 Kc1 draw
3 Kc2 draw
4 Kc3 draw
5 Kd1 draw
6 Kd3 draw
7 Ke1 draw
8 Ke2 draw
9 Ke3 draw
10 Kg1 draw
11 Kg2 draw
12 Kg3 draw
13 Kh1 draw
14 Kh3 draw
15 Rf1 draw
16 Rf3 draw
17 Rf4 draw
18 Rf8 draw
19 Rf5 loss in 2 half-moves
20 Rf6 loss in 2 half-moves
21 Rf7 loss in 2 half-moves
22 Rg2 loss in 2 half-moves