Image: Sudoku Puzzle (a symmetrical puzzle with 17 clues) R4
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Description: A 17-clue Sudoku with diagonal symmetry. It is attributed to RedEd, who found it from a search of transformations of puzzles in a database by Gordon Royle.
Title: Sudoku Puzzle (a symmetrical puzzle with 17 clues) R4
Credit: Own work. Puzzle by RedEd, constructed from similar puzzle in database by "Gordon": (Symmetrical 17 Clue Puzzle) Posted by Rico Alan, June 21, 2008.
Author: LithiumFlash
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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