Tag Archives: Tom Sheldon

Master Class 120 Completes the Update

This post concludes the review update of Tom Sheldon’s Master Class Sudoku and offers an amended review table. The bypass on Master Class 120 is strong enough to keep line marking fill strings short. There are two naked singles, one … Continue reading

PencilPress 81 and Master Class 110

This post concludes the review of PencilPress’ 500+ Sudoku Extreme Puzzles, and adds another puzzle to the review update of Tom Sheldon’s Master Class Sudoku. T The final score was PencilPress Extreme 0, Sysudoku Bypass 10. If “Extreme” means requiring … Continue reading

PencilPress 73 and Master Class 100

Two Basic level reviews continue with Pencil Press  bottom right, page 73 and Tom Sheldon’s Master Class 100.Two Basic level reviews continue with Pencil Press  bottom right, page 73 and Tom Sheldon’s Master Class 100. Let’s begin with a Sysudoku … Continue reading

PencilPress 65 and Master Class 90

This post continues the review of PencilPress Extreme Sudoku and the update of the review of Master Class Sudoku by Tom Sheldon. Each PencilPress bottom right seems to have its own little novelty.  Hopefully, you found the one coming up … Continue reading

PencilPress Extreme 57 and Two Master Classes

Three more Basic victories are reported here with interesting traces. Looking ahead, the blog is heading toward more advanced collections, with this series being the final statement on Sysudoku Basic. Ppbr 57 starts remarkably like ppbr49. C1 makes a wall … Continue reading

PencilPress 33 and Master Class 40

Another test of your Sysudoku Basic, and another witness that the PencilPress Extreme collection is basic level. On the other hand, that doesn’t make it dull. The bypass is actually a worthy challenge, but you have to experience it to … Continue reading

Snapshots from Sheldon’s Master Class

Here are some images from the Master Class review puzzles that illustrate Systematic Sudoku solving in action.  I deemed the collection strong in basic solving, with very limited excursions into advanced techniques. First is the #40 grid at the close … Continue reading

Tom Sheldon on Sudoku Solving

Happy Mardi Gras! Here are the notes l took in Tom Sheldon’s Master Class.  I don’t like to start without pictures, so I’ll checkpoint the line marking of Master Class # 70 first. The 2D trace trails off after a … Continue reading

Grading the Master Class

Tom Sheldon deserves a lot of credit, or blame if you prefer,  for introducing me to serious Sudoku solving.  I pored over the instruction section of his puzzle book, Sudoku Master Class, intrigued by the very idea of a master … Continue reading

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Stuart’s Avoidable Rectangle

In The Logic of Sudoku, Andrew Stuart introduces a UR method in which corners on one side are known values, i.e. clues, and remaining candidates are prevented from forming a deadly rectangle with these clues.  This is his Avoidable Rectangle. … Continue reading

Posted in Advanced Solving, Expert Reviews, Stuart | | 5 Comments