It’s October, which means… all sorts of Halloween games! Today we have printable I Spy Halloween sheets, perfect for ...

This C++ program validates a Sudoku puzzle using multithreading. It checks each row, column, and 3x3 sub-grid for duplicate numbers or numbers outside the range of 1 to 9. The program utilizes POSIX ...

Mathematicians have uncovered a powerful pattern known as the 'Phistomefel Ring' - and it's hidden in every Sudoku ever made. Best of all, puzzle experts say the pattern could help you solve ...

Now in its 31st year, the five-day event is split between two separate yet similar competitions – two days of the World Sudoku Championships, followed by three days of the World Puzzle ...

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“Most of the time, I have precedents in mind: a beautifully designed interior from a magazine, or animal drawings in an old science book,” says Banerjee, an illustrator-cum-architect who captures the ...

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While simply viewing or commenting on a PDF can be accomplished with free software, there are times when we need to engage with a PDF more extensively, making edits or reorganizing a file.

That premise launched multiple brain training websites and apps, and most likely contributed to the sale of countless Sudoku, crossword and logic puzzle books over the past two decades.

Welcome to our free daily crossword puzzles. Follow the clues and attempt to fill in all the puzzle’s squares. Check back each day for a new puzzle or explore ones we recently published.