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

EGTB: win in 4 half-moves

# move score
1 Rd8 win in 3 half-moves
2 Rg3 draw
3 Rg5 draw
4 Rg6 draw
5 Rg7 draw
6 Rh8 draw
7 Ka7 loss in 2 half-moves
8 Kab7 loss in 2 half-moves
9 Kab8 loss in 2 half-moves
10 Kc7 loss in 2 half-moves
11 Kcb7 loss in 2 half-moves
12 Kcb8 loss in 2 half-moves
13 Kd7 loss in 2 half-moves
14 Kd8 loss in 2 half-moves
15 Re8 loss in 2 half-moves
16 Rf8 loss in 2 half-moves
17 Rg1 loss in 2 half-moves
18 Rg2 loss in 2 half-moves
19 Rg4 loss in 2 half-moves