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

EGTB: win in 4 half-moves

# move score
1 Rf3 win in 3 half-moves
2 Rf4 win in 3 half-moves
3 Kb4 win in 5 half-moves
4 Ka4 win in 7 half-moves
5 K1a2 draw
6 Ra8 draw
7 Rf5 draw
8 Rf6 draw
9 Rf7 draw
10 Rg8 draw
11 Rh8 draw
12 K1b2 loss in 2 half-moves
13 K3a2 loss in 2 half-moves
14 K3b2 loss in 2 half-moves
15 Kb1 loss in 2 half-moves
16 Kb3 loss in 2 half-moves
17 Rb8 loss in 2 half-moves
18 Rc8 loss in 2 half-moves
19 Rd8 loss in 2 half-moves
20 Re8 loss in 2 half-moves
21 Rf1 loss in 2 half-moves
22 Rf2 loss in 2 half-moves