Contest With No Prize No.3

I thought this post would be 'Contest With No Prize No.4', but after A Contest With No Prize (September 2012) and Another Contest With No Prize (May 2013), I couldn't find another post in the series. The rules are the same as before.

The following image is a screen capture of high ranked images from a Google image search on 'chess' plus one other word. What is the other word?

The first comment with the correct answer receives absolutely nothing.

Hint: Unauthorized Opening Laboratory (May 2014).