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