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

EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Rb5 win in 7 half-moves
3 Rb7 win in 7 half-moves
4 Rb8 win in 7 half-moves
5 Rb6 win in 9 half-moves
6 Nb6 loss in 2 half-moves
7 Nb8 loss in 2 half-moves
8 Nc5 loss in 2 half-moves
9 Ne5 loss in 2 half-moves
10 Nf6 loss in 2 half-moves
11 Nf8 loss in 2 half-moves
12 Ra4 loss in 2 half-moves
13 Rb1 loss in 2 half-moves
14 Rb3 loss in 2 half-moves
15 Rc4 loss in 2 half-moves
16 Rd4 loss in 2 half-moves
17 Re4 loss in 2 half-moves
18 Rg4 loss in 2 half-moves
19 Rf4 loss in 1 half-moves
20 Rh4 loss in 1 half-moves