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

EGTB: win in 2 half-moves

# move score
1 Kb6 win in 1 half-moves
2 Kb7 win in 1 half-moves
3 Rb8 draw
4 Rf8 loss in 6 half-moves
5 Rh8 loss in 6 half-moves
6 Kc8 loss in 4 half-moves
7 Kd8 loss in 4 half-moves
8 Rg6 loss in 4 half-moves
9 Rg7 loss in 4 half-moves
10 Kc6 loss in 2 half-moves
11 Kd6 loss in 2 half-moves
12 Kd7 loss in 2 half-moves
13 Ra8 loss in 2 half-moves
14 Rc8 loss in 2 half-moves
15 Rd8 loss in 2 half-moves
16 Re8 loss in 2 half-moves
17 Rg2 loss in 2 half-moves
18 Rg3 loss in 2 half-moves
19 Rg4 loss in 2 half-moves
20 Rg5 loss in 2 half-moves
21 Kb8 loss in 1 half-moves
22 Rg1 loss in 1 half-moves