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

EGTB: win in 4 half-moves

# move score
1 Rf8 win in 3 half-moves
2 Rb1 draw
3 Rb5 draw
4 Rb6 draw
5 Rb7 draw
6 Rc8 draw
7 Rd8 draw
8 Re8 draw
9 Kf7 loss in 2 half-moves
10 Kf8 loss in 2 half-moves
11 Kg5 loss in 2 half-moves
12 Kg6 loss in 2 half-moves
13 Kgg7 loss in 2 half-moves
14 Kgh7 loss in 2 half-moves
15 Kh5 loss in 2 half-moves
16 Kh8 loss in 2 half-moves
17 Khg7 loss in 2 half-moves
18 Khh7 loss in 2 half-moves
19 Ra8 loss in 2 half-moves
20 Rb2 loss in 2 half-moves
21 Rb3 loss in 2 half-moves
22 Rb4 loss in 2 half-moves