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Prime Sum Sudoku
http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=13&t=1600
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Author:  Quadrata [ Wed Jan 06, 2021 5:15 pm ]
Post subject:  Prime Sum Sudoku

This one's a bit more challenging, but the rules are still simple. The clues hint at both which cells contain primes, and when sums of entries are prime. More info, a solution, and a PDF version at the following link:

https://quadratablog.blogspot.com/2021/ ... udoku.html

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