Cross Nil game designed for Smartphones
Cross Nil Unlimited Game version 1.1.9
You should try to build row of 5 crosses [X](if you play first) or nils [0] - if you play second. Game is variant of Gomoku or Rendju game on paper-like 19 x 19 field - this is how I played it. First player has advantage.
I estimate AI to be strong for inexperienced player.