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    <p>1) Any and all of those solutions will work; you just have to use somewhat different logic to deal with each one.</p> <p>2) ThreadPool is also useful when you have a set of things that can be executed on multiple threads (for example, in a Chinese Checkers game, you could run 5 different AI simulations via ThreadPool and it would run optimally on a computer that has two cores whereas using Threads would slow the process down due to context switching). It certainly works for your case - you'd just queue a second AIEvaluation or whatever and it would start executing ASAP.</p> <p>3) Well, not really. The computer can't really make its move until after running alphabeta (presumably with some cutoff depth :P) so the AI thread would be done with its work anyhow. You could just use ThreadPool/BackgroundWorker each time.</p> <p>Some general info about BackgroundWorker: it runs when you have "extra" CPU time, so if your main thread is hogging CPU for some reason, it won't do a whole lot. It may be better to use normal ThreadPool.</p> <p>Let's say your program calls AIAct() when it's the AI's turn on the main thread. Also, let timerTick be a timer of the sort that exists in Windows Forms. Moreover, let there be the classes AIState and GameBoard that encapsulate the functionality needed for alpha-beta.</p> <pre><code>using System.Threading; const int CUTOFF_DEPTH = 6;//Maximum plys for alpha-beta AIState state; void AIAct() { state = new AIState( this.GameBoard.GetState() ); ThreadPool.QueueUserWorkItem(RunMinimax, state); //assume that timerTick is a Timer (Windows Forms Timer) that ticks every 100 ms timerTick.Enabled = true; } void timerTick_Tick(object sender, EventArgs e) { if (state.IsComplete) { ExecuteAction(state.Result); timerTick.Enabled = false; //whatever else you need to do } } private static void RunMinimax(object args) { AIState state = args as AIState; if (state == null) { //error handling of some sort Thread.CurrentThread.Abort(); } //run your minimax function up to max depth of CUTOFF_DEPTH state.Result = Minimax( /* */ ); state.IsComplete = true; } private class AIState { public AIState(GameBoard board) { this.Board = board; } public readonly GameBoard Board; public AIAction Result; public volatile bool IsComplete; } </code></pre>
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    1. POWhich is the most recommended thread pattern for game AI and how to implement it?
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    1. COIt seems much easier to use Asynchronous delegate instead which will also execute the function in the ThreadPool. I unserstand that TreadPool is good when you have a couple of threads, but in my case I have just one thread so why is it usefull?
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    2. COYou have one thread that lives and dies quickly and is then reborn. You can just as easily have exactly one long-lived thread who's exact duties change over time (as you re-sync the game-state to it, it starts its alpha-beta search anew).
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