Three-In-A-Row

This is a three-player version of the well known game that goes by a variety of names, including "Four In A Row". To accomodate the extra player, the board can be made bigger (or a little smaller) than the two-player version.
The system will not let you make a move until each piece has finished dropping, or let you add a piece to a column that is already full. No warning is given in either case, since these should both be obvious. You can click anywhere on a particular column, to 'drop' your piece into that column.