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

EGTB: win in 4 half-moves

# move score
1 Kb6 win in 3 half-moves
2 Rd2 win in 7 half-moves
3 Kd2 win in 11 half-moves
4 Ra1 win in 13 half-moves
5 Rb1 win in 15 half-moves
6 Ka5 draw
7 Ka7 draw
8 Kb5 draw
9 Kb7 draw
10 Kc2 draw
11 Kc3 draw
12 Kc4 draw
13 Ke2 draw
14 Ke3 draw
15 Rc1 draw
16 Re1 draw
17 Kd4 loss in 2 half-moves
18 Ke4 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