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 Ra8 draw
3 Rc8 draw
4 Rd8 draw
5 Re8 draw
6 Rf1 draw
7 Rf3 draw
8 Rf4 draw
9 Rf5 draw
10 K4b4 loss in 2 half-moves
11 K4b5 loss in 2 half-moves
12 K5b4 loss in 2 half-moves
13 K5b5 loss in 2 half-moves
14 Ka3 loss in 2 half-moves
15 Ka6 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Kb6 loss in 2 half-moves
18 Rf2 loss in 2 half-moves
19 Rf6 loss in 2 half-moves
20 Rf7 loss in 2 half-moves
21 Rg8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves