Sudokly Blog

Essays on sudoku. history, mathematics, technique, and culture. Human-written, never AI-generated.

Educational11 min · May 13, 2026
The Surprising History of Sudoku: From 1783 Switzerland to Your Phone
Sudoku is not Japanese. It is not even from this century, at least not originally. A 300-year journey through Latin squares, a Swiss mathematician, a retired American architect, and a Tokyo magazine.
Practical8 min · May 7, 2026
Why You're Stuck on Hard Sudoku (And How to Get Unstuck)
The single most common reason hard sudoku feels impossible, and what to look at next when scanning stops working.
Practical9 min · May 5, 2026
How to Get Faster at Sudoku: A Realistic Guide
No magic tricks. Five habits that actually shave minutes off your solve times, and why speed isn't the only thing that matters.