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

EGTB: win in 4 half-moves

# move score
1 Ra4 win in 3 half-moves
2 Kb7 win in 5 half-moves
3 Rb4 win in 7 half-moves
4 Ka7 draw
5 Kb8 draw
6 Kd3 draw
7 Kd4 draw
8 Kd5 draw
9 Ke5 draw
10 Kf3 draw
11 Rc1 draw
12 Rc2 draw
13 Rc3 draw
14 Rc8 draw
15 Rd4 draw
16 Ke3 loss in 2 half-moves
17 Kf4 loss in 2 half-moves
18 Kf5 loss in 2 half-moves
19 Rc5 loss in 2 half-moves
20 Rc6 loss in 2 half-moves
21 Rc7 loss in 2 half-moves