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

EGTB: win in 4 half-moves

# move score
1 Ra5 win in 3 half-moves
2 Ka7 draw
3 Kb7 draw
4 Kb8 draw
5 Kc7 draw
6 Kc8 draw
7 Kd7 draw
8 Ke7 draw
9 Ke8 draw
10 Rb5 draw
11 Rf1 draw
12 Rf2 draw
13 Rf4 draw
14 Rf6 draw
15 Rf7 draw
16 Rf8 draw
17 Rg5 draw
18 Rh5 draw
19 Rc5 loss in 2 half-moves
20 Rd5 loss in 2 half-moves
21 Re5 loss in 2 half-moves
22 Rf3 loss in 2 half-moves