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

EGTB: win in 4 half-moves

# move score
1 Re1 win in 3 half-moves
2 Kc1 draw
3 Kc2 draw
4 Kd2 draw
5 Ke1 draw
6 Ke2 draw
7 Kg1 draw
8 Kg2 draw
9 Kh2 draw
10 Rf2 draw
11 Rf3 draw
12 Rf4 draw
13 Rf5 draw
14 Rf6 draw
15 Rf7 loss in 2 half-moves
16 Rf8 loss in 2 half-moves
17 Rg1 loss in 2 half-moves