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 Rb3 win in 3 half-moves
3 Rc3 win in 3 half-moves
4 Kb5 win in 5 half-moves
5 Ra1 win in 5 half-moves
6 Ka4 win in 9 half-moves
7 Kb6 win in 9 half-moves
8 Ra2 win in 9 half-moves
9 Ka6 win in 11 half-moves
10 Kb2 win in 11 half-moves
11 Kc3 win in 11 half-moves
12 Kd2 win in 15 half-moves
13 Kd3 win in 15 half-moves
14 Kb1 win in 27 half-moves
15 Kb3 draw
16 Kc1 draw
17 Kd1 draw
18 Rd3 draw
19 Re3 draw
20 Ra4 loss in 2 half-moves
21 Rf3 loss in 2 half-moves
22 Rg3 loss in 2 half-moves
23 Rh3 loss in 2 half-moves