Back in 2020, Reddit user /u/KrakenOfLakeZurich created a Sudoku solver in Microsoft Excel. It only uses formulae and conditional formatting, and it's available for both Excel and LibreOffice Calc.

Focus on how you make progress, and how you think about what to look for next. At its core, Sudoku is a pattern recognition puzzle. As you solve more of them, you will slowly get better.

By Dion Dassanayake 15:08, Fri, Oct 14, 2022 | UPDATED: 15:08, Fri, Oct 14, 2022 Bookmark Secret trick will help you solve any sudoku puzzle you are struggling with (Image: GETTY) ...

Pens, pencils and a facility with numbers. Also helpful: earplugs, plushies, a water bottle, calming herbal oil and the occasional “wild bifurcation” (a.k.a. a wild guess).

Sudoku is defined by Merriam-Webster as a 9-by-9 grid puzzle in which the grid is divided into 3-by-3 boxes. Every row, column and box must contain the numbers one through nine, no repeats.