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

EGTB: win in 4 half-moves

# move score
1 Rf1 win in 3 half-moves
2 Ra1 win in 7 half-moves
3 Rb1 win in 7 half-moves
4 Rc1 win in 7 half-moves
5 Nf1 loss in 2 half-moves
6 Nf3 loss in 2 half-moves
7 Ng4 loss in 2 half-moves
8 Rd1 loss in 2 half-moves
9 Re1 loss in 2 half-moves
10 Rg1 loss in 2 half-moves