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

EGTB: win in 1 half-moves

# move score
1 Rxb3 win in 43 half-moves
2 Kaxb3 loss in 2 half-moves
3 Kbxb3 loss in 2 half-moves
4 Rxg6 loss in 1 half-moves