During the solve I realised a bit of logic that I thought would be fun to use in one of these puzzles. I just had to find a nice solution grid in which I could easily implement this. I actually stole a solution grid from the JNPC, which I slightly altered as at one point during construction I ran into no solution. But I noticed that by switching a few numbers around it could still have a solution. The trick I used isn't overly hard but I think it might be wise to try to solve the original puzzle first so that you can understand the logic involved, because I think it is useful to understand the genre before attempting this puzzle. The hit NumberPlace is #19 in the set.
That said, the puzzle is completely logically solvable. I think it is nice but it a bit on the harder side. Still, I hope you'll enjoy it.
Rules for Sudoku
Numbers outside the original grid indicate how many digits are the same in the solution grid in the corresponding row or column.
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Great sudoku, Bram!
ReplyDeleteTo be honest, I have not found the logical path, so I tried both possibilities for number 9 in 4th row. I guess that this is not the logical path you mention...
Matus
The logical opening involves row4. A 6 clue only has two ways on how the wrong digits are reordered. So you know where either the 6 or the 9 in row 4 goes. What information does this give you about row 5? There's a bit more to be done with row 6 and row 9, but this was the logic I mentioned in the post.
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