Microsoft’s Research Lab has released Page Hunt a game where you search in reverse: you’re shown a web page, which you have to "hunt down" using queries sent to Bing. When you see the web page, think of a set of terms that can get back this page.
Page Hunt: Rules of the Game
- Take a look at the web page shown.
- Guess the words to "hunt" it down.
- If the web page is in the top 5 results, you win!
- Get bonus points by avoiding frequent queries!
The Road to Know Where 
That "game" is oddly fun. It’s kind of like playing the "spell check" game (getting the word close enough so the spell checker can guess what you are really trying to spell :)