Here is a tough sudoku puzzle from my blog
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5$\begingroup$ Hello! Your question has likely been downvoted not because of its quality but because you keep adding a link to your blog as if you're advertising it. Its fine to say you've created the puzzle and to link to your blog in your profile, but continuing to add a link to your blog in your questions will likely lead to more downvotes. $\endgroup$– TonksCommented Mar 3, 2022 at 14:53
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5$\begingroup$ I fully understand. You are right, I am advertising it. I put a lot of time into researching the programming required to create my puzzles and even longer writing the actual programs. If you cannot accept a link beside a puzzle I give you I will just have to find other places to share my content. I apologise for any inconvenience I may have caused. $\endgroup$– International DBACommented Mar 3, 2022 at 15:38
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$\begingroup$ Some people don't like similar topics being posted frequently. $\endgroup$– I'm NobodyCommented Mar 3, 2022 at 16:09
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1$\begingroup$ It's certainly harder than the typically "Will Shortz" type of Sudokus. If you want to rate the difficulty, you can pop into a solver like this: sudokuwiki.org/sudoku.htm and see what techniques are required . This one needs Y-wings and Simple Coloring in addition to the "standard" methods $\endgroup$– HilmarCommented Mar 7, 2022 at 13:30
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1$\begingroup$ All sudoku puzzles on my blog (including this one) have a link to work on them online. They also have a link to render them automatically in Andrew Stuart's solver (sudokuwiki.org as mentioned). $\endgroup$– International DBACommented Mar 8, 2022 at 14:14
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Final Solution for the sudoku is:
