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

EGTB: win in 4 half-moves

# move score
1 Rf5 win in 3 half-moves
2 Rf6 win in 3 half-moves
3 Rf8 win in 3 half-moves
4 K6a7 draw
5 K6b7 draw
6 K8a7 draw
7 K8b7 draw
8 Ka5 draw
9 Kb5 draw
10 Kb6 draw
11 Kb8 draw
12 Rd3 draw
13 Re3 draw
14 Rf4 draw
15 Rf7 draw
16 Rg3 draw
17 Rh3 draw
18 Ra3 loss in 2 half-moves
19 Rb3 loss in 2 half-moves
20 Rc3 loss in 2 half-moves
21 Rf1 loss in 2 half-moves
22 Rf2 loss in 2 half-moves