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

EGTB: win in 2 half-moves

# move score
1 Kb1 win in 1 half-moves
2 Kb3 win in 1 half-moves
3 Kb4 win in 1 half-moves
4 K1a2 loss in 2 half-moves
5 K3a2 loss in 2 half-moves
6 Ka4 loss in 2 half-moves
7 K1b2 loss in 1 half-moves
8 K3b2 loss in 1 half-moves