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.

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.

In a typical four-year term, a president replaces about one-quarter of the country’s 870 active federal judges, across both ...

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

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 ...

At 34D, MICR OGRE ENS was the most likely answer to [Certain edible seedlings], making the rebus an OGRE (this is not a ...

(1) A part of a program that has been declared as unchanging. For example, a constant is hard coded and remains the same throughout the execution of the program. (2) Programming code that solves a ...

Conference pears are good for this as they’re slim and the right size for pears that are going to be served with rice pudding (you’ll just have eaten a lot of chilli). If you would rather do something ...

But even as every doctor we see continues to give us the thumbs-up, I’m finding it hard to comprehend. Like Charlie Brown ...

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 ...