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

EGTB: win in 2 half-moves

# move score
1 Rg4 win in 1 half-moves
2 Ra4 draw
3 Rb4 draw
4 Rc4 draw
5 Rd4 draw
6 Re1 draw
7 Re6 draw
8 Re7 draw
9 Re8 draw
10 Rf4 draw
11 Rh4 draw
12 Kg7 loss in 2 half-moves
13 Kg8 loss in 2 half-moves
14 Kh7 loss in 2 half-moves
15 Re2 loss in 2 half-moves
16 Re3 loss in 2 half-moves
17 Re5 loss in 2 half-moves