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 Rg1 draw
7 Rg4 draw
8 Rg5 draw
9 Rg6 draw
10 Kb4 loss in 2 half-moves
11 Kb5 loss in 2 half-moves
12 Kb6 loss in 2 half-moves
13 Kc4 loss in 2 half-moves
14 Kc6 loss in 2 half-moves
15 Kcd4 loss in 2 half-moves
16 Kcd5 loss in 2 half-moves
17 Kcd6 loss in 2 half-moves
18 Ke4 loss in 2 half-moves
19 Ke6 loss in 2 half-moves
20 Ked4 loss in 2 half-moves
21 Ked5 loss in 2 half-moves
22 Ked6 loss in 2 half-moves
23 Kf4 loss in 2 half-moves
24 Kf5 loss in 2 half-moves
25 Kf6 loss in 2 half-moves
26 Rf8 loss in 2 half-moves
27 Rg2 loss in 2 half-moves
28 Rg3 loss in 2 half-moves
29 Rg7 loss in 2 half-moves
30 Rh8 loss in 2 half-moves