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

EGTB: win in 4 half-moves

# move score
1 f7 win in 3 half-moves
2 Rb4 draw
3 Rb5 draw
4 Rb7 draw
5 Rb8 draw
6 Rc6 draw
7 Rd6 draw
8 Re6 draw
9 Rb1 loss in 2 half-moves
10 Rb2 loss in 2 half-moves
11 Rb3 loss in 2 half-moves
12 Ra6 loss in 1 half-moves