BrainKing - Game rules (Anti Line4)

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The rules of Anti Line4 are the same as for normal Line4 with the following differences:

The player who places four or more pieces in a solid row vertically, horizontally or diagonally, loses the game.
If the whole game board is full and no player placed four pieces in a solid row, the white player wins.
It is not allowed to place a piece over the opponent's piece placed at the previous move (except a situation where only one empty column remains). The restriction (for this piece) is not applied at the next moves.

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See also: Five in Line, Line4, Anti Line4, Linetris, Spider Line4, Pente, Keryo Pente, Small Pente, Small Keryo Pente, Open Pente, Open Keryo Pente, Spider Linetris, Pro Five in Line, Swap Five in Line, PahTum, Hasami Shogi, Connect6, Lines of Action, Scrambled Eggs, Parachute Lines of Action, Cheshire Cat Lines of Action