## Types * Select tiles that contain obstacle separately (3×3 highlight; usually 2 to 4 items) * Select tiles that contain obstacle separately (3×3 whack-a-mole) * Select tiles that contain one obstacle together (4×4 highlight) ## Patterns I have noticed the following patterns in CAPTCHA: * The whack-a-mole one mostly fails and the pictures fade in/out slowly, making it exceptionally annoying. * Sometimes, it asks for tile highlighting four times, just to fail (ask to try again) and then succeeds on try 5. In that case; refreshing is just faster. * Sometimes, it asks for tile highlighting on round 1 and 2, where the second one does not contain the subject and pressing *Skip* passes the captcha. * Sometimes, CAPTCHA forgives one error (e.g. missing tile). ## Trivia Pictures of store fronts have been eradicated in 2018 or 2019.