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 Ka3 draw
3 Ka6 draw
4 Ra7 draw
5 Rc8 draw
6 Rg8 draw
7 Rh8 draw
8 K4b4 loss in 2 half-moves
9 K4b5 loss in 2 half-moves
10 K5b4 loss in 2 half-moves
11 K5b5 loss in 2 half-moves
12 Kb3 loss in 2 half-moves
13 Kb6 loss in 2 half-moves
14 Ra6 loss in 2 half-moves
15 Rd8 loss in 2 half-moves
16 Re8 loss in 2 half-moves
17 Rf8 loss in 2 half-moves