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 Nc2 loss in 2 half-moves
3 Nc4 loss in 2 half-moves
4 Nd1 loss in 2 half-moves
5 Nd5 loss in 2 half-moves
6 Ng4 loss in 2 half-moves
7 Ra8 loss in 2 half-moves
8 Rc8 loss in 2 half-moves
9 Rd8 loss in 2 half-moves
10 Re8 loss in 2 half-moves
11 Rf2 loss in 2 half-moves
12 Rf3 loss in 2 half-moves
13 Rf4 loss in 2 half-moves
14 Rf6 loss in 2 half-moves
15 Rf7 loss in 2 half-moves
16 Rg8 loss in 2 half-moves
17 Rh8 loss in 2 half-moves
18 Nf1 loss in 1 half-moves
19 Nf5 loss in 1 half-moves
20 Rf1 loss in 1 half-moves
21 Rf5 loss in 1 half-moves