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

EGTB: win in 2 half-moves

# move score
1 c4 win in 1 half-moves
2 Ra1 draw
3 Ra2 draw
4 Ra3 draw
5 Ra4 draw
6 Ra8 draw
7 f5 loss in 1 half-moves
8 Ra6 loss in 1 half-moves
9 Ra7 loss in 1 half-moves
10 Rb5 loss in 1 half-moves