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

EGTB: win in 4 half-moves

# move score
1 Kb4 win in 3 half-moves
2 Kd4 win in 3 half-moves
3 Rb1 win in 3 half-moves
4 Kb2 win in 5 half-moves
5 Kc2 win in 7 half-moves
6 Rc2 win in 7 half-moves
7 Ka5 draw
8 Ka7 draw
9 Kb3 draw
10 Kb5 draw
11 Kb6 draw
12 Kb7 draw
13 Kc4 draw
14 Kd2 draw
15 Kd3 draw
16 Ra1 draw
17 Rd1 draw
18 Re1 draw
19 Rf1 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rh1 loss in 2 half-moves