A simple rule of thumb is to place the tile on
the playing field so that the group of quarters has always at least one free neighboring cell.
In other words, expand the group of quarters in the direction of the empty areas
on the playing field. At the same time, try to prevent the opponent doing the same thing - and don't forget
that the tiles have quarters with both your and your opponent's colors, so you also "play" for your opponent.
The main challenge is to break the balance in your favour.