Pointer Sums Sudoku by Prasanna Seshadri
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Theme: Clue Symmetry and Logic
Author/Opus: This is the 77th puzzle from our contributing puzzlemaster Prasanna Seshadri.
Rules: Standard Sudoku rules. Also, around the three symbols (circle, diamond, and square), the indicated pairs of labelled cells must have identical sums.
Answer String: Enter the 4th row from left to right, followed by a comma, followed by the 9th row from left to right.
Time Standards (highlight to view): Grandmaster = 6:45, Master = 13:30, Expert = 27:00
Solution: PDF
Note: Follow this link for other less common variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.
Phew… used some really extensive canditate notation here… fun puzzle nonetheless, but after one failed attempt and another 30 minutes to solve it correctly, my brain is tired 😀
This took me a while (probly around 30 mins total) but I thought it was totally worth it, I really wanted to see how it was going to work out. Realizing some of the constraints (particularly how the circles worked) was really interesting.
Another great puzzle. I tend to enjoy sudoku with arithmetic, and this one had more than the usual level of mathematical reasoning even for those types of puzzles — for me at least there was some remainder mod 4 analysis that helped.
19:02.A beautiful puzzle in which all the clues were thoroughly utlilized and played their part to the fullest possible extent.