Happy Google Hacks Week 2004 #4: GoogleJack: Blackjack via Google results.
Thus GoogleJack, with a score total of 101 instead of 21. You pick a word and give Google a word. Google searches and counts the cache size. You can “Hit,” do the next search and add that result count to your cache size, or you can say you’re done. Once you’re done, Google counts the cache size of its keyword search result. Whoever gets the closest to 101 without going over wins. If you go over 101 you bust and you lose.
You have to have a Google API key.