The regular (non-Deep) version of a chess playing program will use just one processor, no more. No matter how many processors or cores your computer has, the chess engine will use only one of them. In contrast, the Deep version of a chess program will use multiple processors or cores, thereby dramatically increasing the speed at which it calculates. A “Deep” engine will be able to evaluate many, many more positions per second than its non-“Deep” counterpart and will thus be able to see “deeper” into a position (hence the names Deep Fritz and Deep Rybka).
How do you find out whether or not you have a multi-processor or multi-core computer? You’ll need to go to the “Control Panel” for whichever flavor of Windows you’re running. Click the “Start” button, then go to “Settings”, and then to “Control Panel” (or “Start” and then straight to “Control Panel” if it’s already visible, as is the case with Windows7). Click “System” (or “System and Security”), then the command for checking your computer’s RAM and processor speed. The dialogue will tell you (after “Processor:”) whether or not your computer has multiple processors or cores.
If you have just one processor, there is no advantage to owning the “Deep” version of a given chess engine. But if your computer does have multiple processors, you will enjoy significantly faster and deeper analysis from a chess program’s “Deep” version.
Have fun! — Steve
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