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

EGTB: win in 4 half-moves

# move score
1 Ra7 win in 3 half-moves
2 Ra1 draw
3 Ra4 draw
4 Ra5 draw
5 Ra6 draw
6 Ra8 draw
7 Re2 draw
8 Rf2 draw
9 Rg2 draw
10 Rh2 draw
11 Kb3 loss in 2 half-moves
12 Kb4 loss in 2 half-moves
13 Kb5 loss in 2 half-moves
14 Kb7 loss in 2 half-moves
15 Kb8 loss in 2 half-moves
16 Kc3 loss in 2 half-moves
17 Kc5 loss in 2 half-moves
18 Kc7 loss in 2 half-moves
19 Kd3 loss in 2 half-moves
20 Kd4 loss in 2 half-moves
21 Kd5 loss in 2 half-moves
22 Kd7 loss in 2 half-moves
23 Kd8 loss in 2 half-moves
24 Ra3 loss in 2 half-moves
25 Rb2 loss in 2 half-moves
26 Rc2 loss in 2 half-moves
27 Rd2 loss in 2 half-moves