1 Dec 2008 09:15
Re: Connect 4 AI
On Fri, 28 Nov 2008, Development wrote: > Good day... > > I am implementing a connect-4 like game, and could use a good AI for > the computer player. Does anyone know of good source implementation of > this? Or an explanation of a good AI? Andy had some excellent suggestions, though I would probably modify min-max search to alpha-beta search. They give the same result, but alpha-beta is much faster and not much more complex. For a much simpler (but not perfect) AI, you can use the observation that nearly all four-in-a-rows go through the central column. So a good first approximation to a strategy is to always play the middle column. Obviously, you should not do this if you can win immediately by another move or if the opponent wins in the next move unless you play somewhere else. So a second-order approximation to a strategy is: 1. If you can win immediately by a move, play this. 2. If the opponent can win in one move, block this if you can. 3. Otherwise, play the central column. Obviously, the central column wil fill up pretty quickly, so after this happens, modify step 3 to "play next to the central column".(Continue reading)
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