The general idea is that you have two kinds of notes: center notes and corner notes. You can also do things like coloring, where you don't know what value a cell is, but you do know that certain cells will have the same or different values from each other.Įveryone has their owns strategy for note taking that makes sense for themselves, but if you're looking for something sensible, I'd recommend looking into Snyder Notation as used by Cracking the Cryptic on YouTube. This can be as simple as noting that a certain cell has very few possible candidates, or that within a box there are only 2-3 cells that can have a candidate. Good notes are when you've discovered something interesting about the grid and want to remember it for later. And then, when you place digits in the grid, it auto-cleans the notes, so you have to keep re-going over your notes to see how they've changed. Apps that do this for you are a terrible crutch, in my opinion, because they remove the important aspect of note taking - specifically, that they help you remember what you've already discovered about the puzzle, and help you focus on what effect newly discovered information has on what you've already discovered.Īuto notes remove both of those things - they aren't things you've discovered, and instead is just more information flooding the grid that means nothing to you until you examine it. As others have said, you're going to have a very difficult time with hard Sudokus without some use of notes, however it's very rarely optimal to just notate the entire grid.
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