Anti-Stack4 is a variation on the game of Stack4 (Connect Four
The object is to make your opponent be the first to connect four
or more pieces in a row.
You can not place a piece on top of the piece your opponent just placed
on the board in the previous move.
If the board fills up with pieces and nobody has put four in a row, the
game is not a draw! The player who moved first is considered
the winner, because moving first is a disadvantage.
All other Stack4 rules remain the same.
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