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 Ka4 draw
3 Ka6 draw
4 Kab4 draw
5 Kab5 draw
6 Kb3 draw
7 Kb6 draw
8 Kc3 draw
9 Kc5 draw
10 Kcb4 draw
11 Kcb5 draw
12 Kd3 draw
13 Ra8 draw
14 Rc8 draw
15 Rd8 draw
16 Re2 draw
17 Re6 draw
18 Re7 draw
19 Kd4 loss in 2 half-moves
20 Kd5 loss in 2 half-moves
21 Re1 loss in 2 half-moves
22 Re3 loss in 2 half-moves
23 Re4 loss in 2 half-moves
24 Re5 loss in 2 half-moves
25 Rf8 loss in 2 half-moves
26 Rg8 loss in 2 half-moves
27 Rh8 loss in 2 half-moves