Lumifer comments on After Go, what games should be next for DeepMind? - Less Wrong Discussion
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Sure. Consider that the game has to run on your sucky home computer (or, <deity> forbid, a console), most likely without a GPU. The strategy/tactics/behaviour code has to share the CPU cycles with a large variety of things including the uninteresting but vital functions like pathfinding and it has to make its decisions within the tick time which is a fraction of second. AND many players prefer the AI to be a pushover, anyway.
I think gaming machines generally do have GPUs...
Of course, the GPU is also running the graphics, but the computer doesn't need to play well enough to beat world champions - I'm pretty sure that Alpha Go running on one CPU+GPU could play at a strong amateur level.
Of course, but mass-market games like Starcraft are designed to perform decently on the run-of-the-mill machines with integrated graphics.