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

EGTB: win in 4 half-moves

# move score
1 Ra6 win in 3 half-moves
2 Ra3 draw
3 Ra4 draw
4 Ra5 draw
5 Ra7 draw
6 Ra8 draw
7 Rd2 draw
8 Re2 draw
9 Rf2 draw
10 Rg2 draw
11 Kb7 loss in 2 half-moves
12 Kb8 loss in 2 half-moves
13 Kc6 loss in 2 half-moves
14 Kcc7 loss in 2 half-moves
15 Kcd8 loss in 2 half-moves
16 Kd6 loss in 2 half-moves
17 Kdc7 loss in 2 half-moves
18 Kdd8 loss in 2 half-moves
19 Ke6 loss in 2 half-moves
20 Ke7 loss in 2 half-moves
21 Ke8 loss in 2 half-moves
22 Ra1 loss in 2 half-moves
23 Rb2 loss in 2 half-moves
24 Rc2 loss in 2 half-moves
25 Rh2 loss in 2 half-moves