GoSharp

A C# class library for the game of Go (a.k.a Igo, Weiqi, Baduk).

Table of Content

• Starting a New Game
• Setting Up a Position

Starting a New Game

To start a new game, create a GameInfo object, specify the handicap, the board size, the starting player and the komi in it. Then create a Game object using the GameInfo parameter constructor.

Example:

GameInfo gi = new GameInfo() { Handicap = 2, StartingPlayer = Content.White };
Game game = new Game(gi);

Making a Move

To make a move, call the MakeMove method on a game object. The method will return a new game object representing the state of the game after the move. The current implementation accepts all moves, including suicide, overwrite and super-ko violating moves.

As shown, there are overloads of the MakeMove method which set an out bool parameter with true or false depending on the legality of the move.

Example:

bool legal;
Game postMove = game.MakeMove(3, 3, out legal);

Variations

To start a variation sub-game, call MakeMove on any Game node in the tree. All variations are recorded in the game tree, and may be exported to SGF.

Setting Up a Position

To set up a board position without going through all the moves, you can use setup moves instead. Setup moves are not checked for legality; they can overwrite, create groups with no liberties, etc. They are used, for example, to set up a life-and-death go problem, or to show common patterns that appear in game. To use setup moves call the SetupMove method on a game object.

Example 1: Setting up a free-placed handicap:

GameInfo gi = new GameInfo() { StartingPlayer = Content.White };
Game g = new Game(gi);
g.SetupMove(3, 3, Content.Black); // Place a black stone on the lower left star point.
g.SetupMove(9, 9, Content.Black); // Place a black stone in the center of the board.
g.SetupMove(3, 15, Content.Black); // Place a black stone in the upper left star point.
Console.WriteLine(g.SerializeToSGF(null));

When exporting to SGF, the setup moves will appear correctly:

(;FF[4]PL[W]AB[dd][jj][dp])