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

EGTB: win in 6 half-moves

# move score
1 Rb8 win in 5 half-moves
2 Kgg7 draw
3 Kgh7 draw
4 Khg7 draw
5 Khh7 draw
6 Ra1 draw
7 Rb2 draw
8 Rb3 draw
9 Rb4 draw
10 Rf1 draw
11 Rg1 draw
12 Rh1 draw
13 Kf7 loss in 2 half-moves
14 Kf8 loss in 2 half-moves
15 Rb5 loss in 2 half-moves
16 Rb6 loss in 2 half-moves
17 Rb7 loss in 2 half-moves
18 Rc1 loss in 2 half-moves
19 Rd1 loss in 2 half-moves
20 Re1 loss in 2 half-moves