Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

With the electrification of society and the green transition, the need for efficient high-power electronic converters to support the electricity demand is at an all-time high. A key enabler is the ...

Get all three sports-related questions of varying difficulty (easy, medium and hard) and you claim the Herald hat-trick. Quiz ...

Maintaining brain health is just as important as caring for our bodies, especially as we grow older. Keeping the brain in ...

This paper presents a high-frequency modular medium-voltage AC (4160 VAC or 13.8 kVAC) to low-voltage DC (400 VDC) system that is scalable in order to be used for different scale microgrids. A 15 kW, ...

In a bizarre bid to promote the Xbox Series X, Microsoft is targeting customers still holding onto their discontinued Xbox 360s.

Dusk’s viral Memory Foam Hybrid Mattress feels like ‘sleeping on a marshmallow’ - now up to £200 off in the TikTok-famous sale!

Although it is based on Mary S. Lovell's biography of the Mitford family, this new drama "could easily be mistaken for a work of fiction", said Megan Bull in the Radio Times. The aristocratic ...

Today’s author, Charlie Ellis, a Program Manager on the Excel team, shares a spreadsheet he built in Excel for solving Sudoku puzzles. The spreadsheet can be found in the attachments at the bottom of ...

Medium Sudoku: June 24, 2025 Solve the grid in this medium Sudoku puzzle! The objective of Sudoku is to fill each row, column and sub-grid with exactly one of each number from 1-9.