Game of Go
Go offers an extraordinary intellectual challenge. The rules are simple, yet attempts to program computers to play Go have not met with much success. It is not difficult for a competent Go player to beat the best Go program available. This makes the programming challenge a great one as well, and many bright minds are presently turned to that 'artificial intelligence' task. There is great scope for intuition and experiment in a game of Go, especially in the opening. Go has a very effective handicapping system, enabling players of widely differing strengths to play each other on equal terms. It also has a good personal skill rating system.
The basic rules are simple. The board has 19 horizontal and 19 vertical lines, so there are 361 intersections. These intersections are considered 'points of territory' and the object of the game is to control as many of them as possible, by encirclement. One player has a pot of black stones and the other a pot of white stones. The black player goes first and places a black stone on any one of the 361 points. Then the white player does likewise and the game continues in this manner until neither wishes to play any more stones on the board. When the game is over, the score is tallied to determine the winner. Each player gets points for the vacant territory (intersections) his stones surround. This is the essence of the game.
However, there is one additional aspect that is critical. A player can kill one or more of his opponent's stones by surrounding it/them on all adjacent points of territory. Thus, four black stones could surround a lone white stone in the middle of the board, for example, or six black stones could surround a pair of white stones side-by-side in the middle of the board. When stones are surrounded in this way, they are removed from the board and the dead stones count as additional points for the side that killed them.
Central to the game of Go are the concepts of connections and good shape. One surrounds territory using groups of connected stones. At the start of the game the connections are loose; they get tightened up as the game proceeds.
Those are the basics, although the rules are actually just a bit more complicated. If you want to learn more about the basics of Go, there are several good sources on the Internet. I recommend the British Go Association. You could also read John Bate's A Beginner's Introduction to Go and Karl Baker's The Way to Go.
While the standard game of Go is played on a 19x19 board, one can also play on smaller boards and, of course, the game is completed more quickly. If you have the Java runtime installed you can click here to see an example game played on a 9x9 board. Click here to see another.
For those who are more serious about their interest in Go, there is lots of good, in-depth information available on the Internet.
There is an active usenet group for go at news:rec.games.go.
Alternatively, you might
You can play Go over the Internet at:
The Japanese Rules of Go (in English) are readily available online.
You will find useful definitions of Go terms at Sensei.
Several useful Go proverbs serve as reminders of the principles of good play.
An excellent 41-page treatise on the use of Go thinking in Chinese military strategy, authored by Dr. David Lai and entitled "Learning from the Stones: A Go Approach to Mastering China's Strategic Concept, Shi", is available at the site of the Strategic Studies Institute of the U.S. Army War College or here.
Hideki Nakazawa has devised a fascinating example of seki. All of the stones on the extra-large 35x35 board below are in a seki arrangement. If either player puts a stone anywhere, the other player can then kill all of his stones in a cascading series of plays. Hiroki Mori has illustrated how this works using his GoodShape Java applet.
Compiled, developed and maintained by Philip Smith