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

EGTB: win in 4 half-moves

# move score
1 Rb8 win in 3 half-moves
2 Nb5 draw
3 Nc2 draw
4 Nc6 draw
5 Ne2 draw
6 Nf3 draw
7 Ra3 draw
8 Rb1 draw
9 Rb2 draw
10 Rb4 draw
11 Rc3 draw
12 Rd3 draw
13 Re3 loss in 4 half-moves
14 Ne6 loss in 2 half-moves
15 Nf5 loss in 2 half-moves
16 Rb5 loss in 2 half-moves
17 Rb6 loss in 2 half-moves
18 Rb7 loss in 2 half-moves
19 Rf3 loss in 2 half-moves
20 Rg3 loss in 2 half-moves
21 Rh3 loss in 2 half-moves