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

EGTB: win in 4 half-moves

# move score
1 Ka1 win in 3 half-moves
2 Ka5 win in 3 half-moves
3 Kb1 win in 3 half-moves
4 Kb2 win in 3 half-moves
5 Kb4 win in 3 half-moves
6 Kb5 win in 3 half-moves
7 Rb3 win in 3 half-moves
8 K2b3 draw
9 K4b3 draw
10 Rc3 draw
11 Rd3 draw
12 Re3 draw
13 Rf3 draw
14 Rg3 loss in 2 half-moves
15 Rh3 loss in 2 half-moves