Google recently announced LIFE photo archive hosted by Google, 'Search millions of historic photos'. As you might expect, there are a few chess photos.
Results 1 - 20 of about 200 for chess source:life.
For some reason, the many LIFE photos from the 1972 Fischer - Spassky match are missing. Here are two I'd never seen before: American chess champion Robert J. Fischer playing pinball and eating cotton candy.