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

EGTB: win in 4 half-moves

# move score
1 Ka6 win in 3 half-moves
2 Kb6 win in 3 half-moves
3 K7b8 win in 5 half-moves
4 K7b7 draw
5 K8b7 draw
6 K8b8 draw
7 Ra5 draw
8 Rb1 draw
9 Rb2 draw
10 Rb3 draw
11 Rb4 draw
12 Rb6 draw
13 Rb7 draw
14 Rc5 draw
15 Rd5 draw
16 Rh5 draw
17 Rb8 loss in 1 half-moves
18 Re5 loss in 1 half-moves
19 Rf5 loss in 1 half-moves
20 Rg5 loss in 1 half-moves