The key to improving concentration isn't powering through Sudoku puzzles without stopping. Taking short breaks between ...

All four cells have the same two candidates left (in real Sudoku, not all cells have to hold all of the UR candidates)." ...

Play our daily hard sudoku here. Plus, you can let us know what you think of the puzzles by emailing at hey@metro.co.uk. We look forward to hearing from you.

Here's the answer for "Wordle" #1230 on October 31, as well as a few hints, tips, and clues to help you solve it yourself.

The World Sudoku Championships start on Monday, with competitors from 31 countries set to spend 28 hours solving the toughest ...

Effective therapists don’t necessarily provide instant cures for mental struggles. Instead, they help people reframe thoughts ...

Known as the “Godfather of Sudoku,” Kaji created the puzzle to be easy for children and others who didn’t want to think too hard. Its name is made up of the Japanese characters for “number ...

In early tests, this DNA computer even solved puzzles, like simplified versions of sudoku and chess ... the DNA equivalent of ...

Yesterday's Sudoku had multiple 5's in places they can ... I’m an alumnus of Purdue and hate me some IU, but it's hard to not be impressed and, ugh, like Cig. Please delete this and never ...

The Lions really didn't even need their elite offense to deliver a second blowout victory in three weeks, this time against ...

Get all three sports-related questions of varying difficulty (easy, medium and hard) and you claim the Herald hat-trick. Want more quizzes? Test your knowledge in the Herald’s Morning quiz and ...

Play our daily hard sudoku here. Plus, you can let us know what you think of the puzzles by emailing at hey@metro.co.uk. We look forward to hearing from you.