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 Kc6 draw
3 Kc7 draw
4 Kc8 draw
5 Rc8 draw
6 Re5 draw
7 Ka2 loss in 2 half-moves
8 Ka4 loss in 2 half-moves
9 Ka6 loss in 2 half-moves
10 Ka7 loss in 2 half-moves
11 Ka8 loss in 2 half-moves
12 Kb2 loss in 2 half-moves
13 Kb3 loss in 2 half-moves
14 Kb4 loss in 2 half-moves
15 Kb6 loss in 2 half-moves
16 Kb8 loss in 2 half-moves
17 Ra8 loss in 2 half-moves
18 Rd8 loss in 2 half-moves
19 Re1 loss in 2 half-moves
20 Re2 loss in 2 half-moves
21 Re3 loss in 2 half-moves
22 Re4 loss in 2 half-moves
23 Re6 loss in 2 half-moves
24 Re7 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