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

EGTB: win in 4 half-moves

# move score
1 Rd4 win in 3 half-moves
2 Ka4 win in 5 half-moves
3 Kb4 win in 5 half-moves
4 Ra8 win in 5 half-moves
5 Rb8 win in 5 half-moves
6 K1a2 draw
7 K1b2 draw
8 K3a2 draw
9 K3b2 draw
10 Kb1 draw
11 Kb3 draw
12 Rc8 draw
13 Rd3 draw
14 Rd5 draw
15 Rd6 draw
16 Rd7 draw
17 Re8 draw
18 Rd1 loss in 2 half-moves
19 Rd2 loss in 2 half-moves
20 Rf8 loss in 2 half-moves
21 Rg8 loss in 2 half-moves
22 Rh8 loss in 2 half-moves