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 K2b3 win in 7 half-moves
6 Re3 draw
7 K4b3 loss in 2 half-moves
8 Kb4 loss in 2 half-moves
9 Kb5 loss in 2 half-moves
10 Rb3 loss in 2 half-moves
11 Rc3 loss in 2 half-moves
12 Rd3 loss in 2 half-moves
13 Rf3 loss in 2 half-moves
14 Rg3 loss in 2 half-moves
15 Rh3 loss in 2 half-moves