Another Dave Green Sysudoku Basic Workout

This post details  another Sunday Dave Green 5-star coming ever so close to breaking the limit that Dave seems to impose on his Sunday puzzles. It appeared in the 9/15/2019 edition of the Akron Beacon Journal.

My grid is unimpressed by the bypass and box marking. Only 5 cells claimed and 4 slinks marked. No clues. Did you do any better? Line marking will take some time.






It did. Two naked singles helped, but first  time through, I missed the  first hidden dublex Shdx2, and then the second one, Chdx9.



The grid, as  SW13 is confirming NW6 to trigger the collapse, shows why Green 915 is especially tough, even though it didn’t get through line marking.




The strong bv field, such an asset in advanced methods, allows two extensive ‘almost’ solutions to divide available candidates among them amicably, keeping the secret of which is true.

Missing the dublexes is not all bad. You reach the solution with this unique rectangle, Type 1, and one or both of






this BARN and/or naked triple.











Next time, we’ll start the review of the crudely titled FTSPAH collection with ftspah 4 and 24.  One is solved by the bypass, and the other requires several advanced moves. Your mission: determine which is which. Buy the book and keep the title away from the children if you’d like to get ahead of the review. It picks every 20th, ending in 184.


About Sudent

I'm John Welch, a retired engineering professor, father of 3 wonderful daughters and granddad to 7 fabulous grandchildren. Sudoku analysis and illustration is a great hobby and a healthy mental challenge.
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