Category Archives: Sheldon

Tom Sheldon in Sudoku Master Class

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

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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

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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

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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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