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

EGTB: win in 4 half-moves

# move score
1 Kc2 win in 3 half-moves
2 Kd2 win in 3 half-moves
3 Rb2 win in 3 half-moves
4 Rb1 win in 5 half-moves
5 Ka3 draw
6 Ka4 draw
7 Ka5 draw
8 Kc1 draw
9 Kc3 draw
10 Kc4 draw
11 Ke1 draw
12 Ke2 draw
13 Ra3 draw
14 Rf3 draw
15 Rg3 draw
16 Rh3 draw
17 Kb5 loss in 2 half-moves
18 Kc5 loss in 2 half-moves
19 Rc3 loss in 2 half-moves
20 Rd3 loss in 2 half-moves
21 Re3 loss in 2 half-moves