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 f8=N draw
3 Rb2 draw
4 Rb6 draw
5 Re1 draw
6 f8=K loss in 18 half-moves
7 Ra1 loss in 6 half-moves
8 Rb7 loss in 6 half-moves
9 Rc1 loss in 4 half-moves
10 f8=B loss in 2 half-moves
11 f8=Q loss in 2 half-moves
12 f8=R loss in 2 half-moves
13 Rb3 loss in 2 half-moves
14 Rb4 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rf1 loss in 2 half-moves
17 Rg1 loss in 2 half-moves
18 Rh1 loss in 2 half-moves
19 Rd1 loss in 1 half-moves