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

EGTB: win in 2 half-moves

# move score
1 Ra4 win in 1 half-moves
2 Ka5 draw
3 Ka7 draw
4 Kb6 draw
5 Kb7 draw
6 Ra1 draw
7 Ra5 draw
8 Rb2 draw
9 Rc2 draw
10 Rd2 draw
11 Re2 draw
12 Kb5 loss in 2 half-moves
13 Ra3 loss in 2 half-moves
14 Rf2 loss in 2 half-moves
15 Rg2 loss in 2 half-moves
16 Rh2 loss in 2 half-moves