Doesnt works

En passent doesnt work correctly. It lets you make the move but doesnt take the opponents pawn. So far, Ive tried two chess apps and both had serious flaws. Also, this app crashed on me when I bumped one of my pieces when it was the computers turn. It moved my piece and crashed when i tried to undo the move. Good competition but can anyone make a chess app that works?

."does this work,?! about Free Chess Games