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

EGTB: win in 4 half-moves

# move score
1 Ra8 win in 3 half-moves
2 Kb6 draw
3 Kb7 draw
4 Kc7 draw
5 Kd6 draw
6 Kd7 draw
7 Kg7 draw
8 Kg8 draw
9 Kh7 draw
10 Ra4 draw
11 Ra5 draw
12 Ra6 draw
13 Ra7 draw
14 Rb3 draw
15 Rf3 draw
16 Rg3 draw
17 Rh3 draw
18 Kb5 loss in 2 half-moves
19 Kc5 loss in 2 half-moves
20 Kd5 loss in 2 half-moves
21 Ra1 loss in 2 half-moves
22 Ra2 loss in 2 half-moves
23 Rc3 loss in 2 half-moves
24 Rd3 loss in 2 half-moves
25 Re3 loss in 2 half-moves