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There's an English language family member of this granted patent that was filed in the UK. English specification starts around page 30: https://patentimages.st

• tomtung 5y ago
  The rules are more clearly depicted on page 4, with different variations depicted on the pages following that. Looks fairly straightforward to implement. Until this is more widely available "officially", I'll probably just hack up some Chrome extension for personal use and try it out.