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Basic Rules:
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It's a board game between two players while one player
holds black stones and another player holds white stones.
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The board has 15x15 lines. The board is empty at first.
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Each player takes turns to place one stone on one of
the vacant intersections of the board each time. Players can only add
stones but not touch any existing stones already on the board.
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The player holding the black stones starts the game by
placing the first black stone.
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The first player to get an unbroken line of five stones
in his/her color whether vertically, horizontally, or diagonally, wins
the game.
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If neither player has succeeded in making a row of five
stones when the board has been played out, the game is called a draw.
It is also possible to agree on draw.
The above rules are called "Free Rules" in this software. They are
perfect for beginners. But experienced players will realize the black
side has big advantage by putting the first stone. So there are some
extra restrictions introduced to black side. In this software, they are
called "Advanced Rules". They are extensions of “Free Rules”.
Advanced Rules:
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Black is prohibited from making a double open three.
An open three is two
threes that both can develop into open 4 thus can't be blocked.
In the following
diagram, A is a double open three and thus prohibited. B
is legal for black and thus not regarded as double open three.
 
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Black is prohibited from making a double four.
A double four is two
fours that both can develop into 5.
In the following
diagram, A is a double four thus prohibited. B is legal
for black and not regarded as a double four.
 
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Black is prohibited from making an
overline (more than 5 stones in an unbroken line).
The following diagram
is an example of overline.
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If Black makes one of above 3 patterns either
accidentally or by being forced to, he loses the game.
In Practice mode, user can choose playing either basic rules or advanced
rules. In Challenge mode, user has to play basic rules from level 1 to 5
and advanced rules from level 6 to 10. |
