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

EGTB: win in 4 half-moves

# move score
1 Rb2 win in 3 half-moves
2 Kb7 win in 5 half-moves
3 Kc7 win in 5 half-moves
4 Kb2 draw
5 Kb4 draw
6 Kb8 draw
7 Kd7 draw
8 Kd8 draw
9 Rd1 draw
10 Ka2 loss in 2 half-moves
11 Ka3 loss in 2 half-moves
12 Ka4 loss in 2 half-moves
13 Kc2 loss in 2 half-moves
14 Kc3 loss in 2 half-moves
15 Kc4 loss in 2 half-moves
16 Ra1 loss in 2 half-moves
17 Rc1 loss in 2 half-moves
18 Re1 loss in 2 half-moves
19 Rf1 loss in 2 half-moves
20 Rg1 loss in 2 half-moves
21 Rh1 loss in 2 half-moves