Nested Search Rankings – MSN Patent

Bill spots another patent, this time from MSN.

The summary:

Take a search query, and grab 100.000 relevant pages in response to it. Take those 100,000 results, and rerank and sort them looking at some other factors. Then pull the top 1000 of those, and shuffle their order based upon other features from them. Take the top 500 and rerank them using other criteria. Then show the top ten to a searcher

I’m just wondering how they could manage to do such a thing so quickly? It could, of course, be just an idea, as opposed to a functioning system.

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