JoyGo(iPhone & iPad) - This edition applies to iOS4.3 and above for iPhone & iPad, if the other version of iPhone & iPad to use this software for any problems, the author will be not liable. The "software" was developed by Wang Yanzheng. Warning: This computer program is protected by copyright law and international treaties. Unauthorized reproduction or distribution of this program, or any portion of it, may result in severe civil and criminal penalties, and will be prosecuted to the maximum extent possible under the law.

Support URL:


Joygo is a go game with independent research and development artificial Intelligence and high power. You can enjoy it to play with your Iphone&Ipad. At the same time Joygo also includes 70,000+ game records of super star player for you to learn. It is very helpful for you to study and improve your go game skill. Joygo has several main features:

1.     Play with others through Apple Game center, you can enjoy games through internet.

2.     Play with your Iphone&Ipad with artificial Intelligence, it is really free for you to enjoy.

3.     Game record of super star player, you can free to view 3 records. You can purchase all the game records by one-time purchase with low price.

4.  Live broadcast for match of professional game player.  The live broadcast information is from internet.

5.  You can also manager your own game records of go through yourself database.

Rules of Go

Definitions (1)

n x n go board

A grid comprising n equally spaced parallel lines and n other parallel lines orthogonally intersecting them is called an n x n go board.

grid line

The parallel lines that intersect orthogonally on the board are called grid lines.

grid point

The points of intersection of grid lines are called grid points.

empty grid point

A grid point not occupied by a stone is called an empty grid point.

occupied grid point

A grid point occupied by a stone is called an occupied grid point.

played stone

A stone occupying a grid point is called a played stone.

adjacent points

On the grid lines incident with a given grid point, the grid points closest to that grid point are called the adjacent points of that grid point.

Definitions (2)


To play means to place a stone on an empty grid point.


To remove means to remove a played stone from a grid point.


To move means to play or pass.


To pass means to proceed to the next turn without playing.

Definitions (3)

removable state

A set of played stones of the same color is said to be in a removable state if all grid points that are not occupied by the set, but are adjacent points of grid points occupied by the set, are occupied by played stones of the other color.

Definitions (4)


The arrangement of all played stones on the board is called a configuration.

Definitions (5)


If continued motion on the grid lines in a set of empty grid points, starting from any grid point in the set, always leads to played stones of the same color, that set of empty grid points is said to be territory of that color, and those played stones are said to surround that territory.


Rule 1  Black and white stones: One of the two players possesses black stones; the other player possesses white stones. The players play stones of their own possession.

Rule 2  Rule of alternate moves: The players move alternately. A player who fails to move loses.

Rule 3  Rule of removing: When a stone has been played, if a set of stones of the other color is in a removable state, that set of played stones is removed before the next move.

Rule 4  Rule prohibiting repeated configurations: If playing on a grid point places any stones of the other color in a removable state, the configuration resulting from removal of those stones must not be identical to a configuration that has already appeared in the game.

Rule 5  Rule prohibiting self-capture: If playing on a grid point does not place any stones of the other color in a removable state, the played stone itself must not be in a removable state.

Rule 8  Rules establishing conditions of play: Separate rules may be made concerning the first move (e.g. handicap stones) and determination of the winner (komi).