Expand Territory Ext

Put the piece on the board and win a lot of territory.
The competition will be done by four people, but if the members do not gather, the computer will play the opponent.
The player has 21 kinds of pieces. Pieces are placed on the board in turn, and the game is over when everyone can not put a piece. We judge victory / defeat by the number of your block on the board.
The rules are as follows.
1. Put the pieces you put first on somewhere in the four corners.
2. From the second time on, please keep your corner in contact with your piece.
Also, you can not keep your piece in contact with its side.
3. There is a time limit, so be careful. (You can change by setting)
4. If you put one piece at the end, you get bonus points.