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

EGTB: win in 4 half-moves

# move score
1 Rb4 win in 3 half-moves
2 Rb1 win in 7 half-moves
3 Rb7 win in 7 half-moves
4 Rb8 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 Ra3 loss in 2 half-moves
9 Rb2 loss in 2 half-moves
10 Rb5 loss in 2 half-moves
11 Rb6 loss in 2 half-moves
12 Rc3 loss in 2 half-moves
13 Re3 loss in 2 half-moves
14 Rf3 loss in 2 half-moves
15 Rg3 loss in 2 half-moves
16 Rd3 loss in 1 half-moves
17 Rh3 loss in 1 half-moves