I get it, but 10 puzzles in a row? It's not like the number of puzzles makes a difference to a bot when they're all of the same type (except for the bots that guess randomly, but there would be smarter combinatorial ways to trip those up that are less user-hostile; eg simply saying "select all" instead of "select the one" increases the possibilities tenfold while increasing effort only ~twofold). You're going to be filtering out a lot of humans this way. I personally only went through with it out of curiosity, because I was half-expecting it to not work in the end - as it did, so at least I have a story to tell now.