The History of Sudoku – THE HOURGLASS

Logic, patience and a pencil: that’s all you need to defeat Sudoku’s 9×9 grid. At first glance, the maze of numbers and empty squares seems like a mathematical quandary. But upon closer inspection, Sudoku requires no mathematical skill at all. It also doesn’t require general knowledge (like crossword puzzles) or linguistic ability (like word games)

The History of Sudoku – THE HOURGLASS

No patience Cut Out Stock Images & Pictures - Alamy

Classic Sudoku Archives - The Art of Puzzles

Hourglass History – My Hourglass Collection Museum and Laboratory

Sudoku history

Magnetic hourglass

The History of Sudoku - 18th Century, by Komeil Mehranfar, Nov, 2023

Daily Sudoku, Games & Puzzles

To Wear the Sudoku Crown, One Must Solve Any Number of Puzzles - The New York Times