Image: Sudoku puzzle hard for brute force
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Description: A Sudoku that is difficult to be solved by a brute force algorithm.
Title: Sudoku puzzle hard for brute force
Credit: Own work. Puzzle: "Rico Alan - Star Burst Polar Graph". (Sudoku posted by Rico Alan in description, March 25, 2008).
Author: Auguel
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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