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

EGTB: win in 4 half-moves

# move score
1 Rb5 win in 3 half-moves
2 Rb6 win in 3 half-moves
3 Kb5 win in 5 half-moves
4 K3a4 draw
5 K3b4 draw
6 K5a4 draw
7 K5b4 draw
8 Ka6 draw
9 Kb6 draw
10 Ra7 draw
11 Rb3 draw
12 Rb4 draw
13 Rb8 draw
14 Rf7 draw
15 Rg7 draw
16 Rh7 draw
17 Ka2 loss in 2 half-moves
18 Kb2 loss in 2 half-moves
19 Kb3 loss in 2 half-moves
20 Rb1 loss in 2 half-moves
21 Rb2 loss in 2 half-moves
22 Rc7 loss in 2 half-moves
23 Rd7 loss in 2 half-moves
24 Re7 loss in 2 half-moves