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  • $\begingroup$ Your idea is greater. could you please extend your answer and provide links or examples? $\endgroup$
    – Nick
    Commented Sep 14, 2020 at 6:30
  • $\begingroup$ @Nick I've expanded the answer, hopefully those examples are helpful. $\endgroup$
    – Sellyme
    Commented Sep 14, 2020 at 6:47
  • $\begingroup$ Hi Sellyme, and welcome to Puzzling :) A hexagonal grid is a nice idea for upping the available numbers - kudos for that. You'd still need some way to extract numbers that aren't just the starting keys, but in tandem with some of the other ideas already suggested this is a powerful addition to this growing toolbox - nice insight :) $\endgroup$
    – Stiv
    Commented Sep 14, 2020 at 7:09