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

EGTB: win in 4 half-moves

# move score
1 Rb7 win in 3 half-moves
2 Ra7 draw
3 Rc7 draw
4 Rd7 draw
5 Re7 draw
6 Rf7 draw
7 Rg2 draw
8 Rg3 draw
9 Rg4 draw
10 Rg5 draw
11 K6a7 loss in 2 half-moves
12 K6b7 loss in 2 half-moves
13 K8a7 loss in 2 half-moves
14 K8b7 loss in 2 half-moves
15 Ka5 loss in 2 half-moves
16 Kb5 loss in 2 half-moves
17 Kb6 loss in 2 half-moves
18 Kb8 loss in 2 half-moves
19 Rg1 loss in 2 half-moves
20 Rg6 loss in 2 half-moves
21 Rg8 loss in 2 half-moves
22 Rh7 loss in 2 half-moves