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

EGTB: win in 4 half-moves

# move score
1 Rb6 win in 3 half-moves
2 Ka6 draw
3 Kb5 draw
4 Kb6 draw
5 Ra6 draw
6 Rc6 draw
7 Rd6 draw
8 Re1 draw
9 Re4 draw
10 Rf6 draw
11 Ka4 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Re2 loss in 2 half-moves
14 Re3 loss in 2 half-moves
15 Re5 loss in 2 half-moves
16 Re7 loss in 2 half-moves
17 Re8 loss in 2 half-moves
18 Rg6 loss in 2 half-moves
19 Rh6 loss in 2 half-moves