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 Rf8 draw
7 Rg1 draw
8 Rg4 draw
9 Rg5 draw
10 Rg6 draw
11 K3b3 loss in 2 half-moves
12 K3b4 loss in 2 half-moves
13 K4b3 loss in 2 half-moves
14 K4b4 loss in 2 half-moves
15 Ka2 loss in 2 half-moves
16 Ka5 loss in 2 half-moves
17 Kb2 loss in 2 half-moves
18 Kb5 loss in 2 half-moves
19 Rg2 loss in 2 half-moves
20 Rg3 loss in 2 half-moves
21 Rg7 loss in 2 half-moves
22 Rh8 loss in 2 half-moves