The crowd-sourced difficulty ratings for my #Chainagram #WordPuzzle are created with data collected using the wonderful Simple Analytics simpleanalytics.com by @AdriaanvRossum. The best thing? As well as being simple to use it's totally anonymous, unlike #GoogleAnalytics. Here's how it works: when you solve a puzzle, a number of Simple Analytics Events docs.simpleanalytics.com/events are triggered (again, completely anonymous). This includes how many additional checks you used (the same data is presented on page to the player).