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 Kb5 win in 3 half-moves
3 Kb6 win in 3 half-moves
4 Rb1 win in 3 half-moves
5 Ka6 win in 5 half-moves
6 Ka4 draw
7 Rc1 draw
8 Rd1 draw
9 Re1 draw
10 Ra2 loss in 2 half-moves
11 Ra3 loss in 2 half-moves
12 Ra4 loss in 2 half-moves
13 Rf1 loss in 2 half-moves
14 Rg1 loss in 2 half-moves
15 Rh1 loss in 2 half-moves