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

EGTB: win in 4 half-moves

# move score
1 b7 win in 3 half-moves
2 Rb1 draw
3 Rb2 draw
4 Rb4 draw
5 Ra3 loss in 2 half-moves
6 Rb5 loss in 2 half-moves
7 Rc3 loss in 2 half-moves
8 Rd3 loss in 2 half-moves
9 Re3 loss in 2 half-moves
10 Rf3 loss in 2 half-moves
11 Rg3 loss in 2 half-moves
12 Rh3 loss in 2 half-moves