![]() ![]() I just fill in all numbers missing from a 9-square, then further subtract numbers existing in rows across and then again down. Please explain just what a “buddy” is.Īt what point does reverse engineering fail? But, r1c2 contains a 9 as the correct answer. In your example, you write that in figure 4, r1c1, r1c2, and r2c9 are “buddies” of the first and last cell of the Golden Chain. Maybe I just don’t understand the definition of “buddies”. I will translate and update my own website with those techniques. KrazyDad happens to have a good overview. I am currently at a level where I can solve all easy and intermediate Sudokus, but I still have some problems doing the hard ones, so I was looking for Sudoku solving strategies on the web.
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