A good puzzle is part problem-solving and part magic. In the following quiz, we test your knowledge of some of the world's most mystifying 3D puzzles. Are you ready to get stumped? See more »

Cryptograms have been used for centuries by world leaders, clandestine lovers, and anyone wishing to keep something under wraps. Test your knowledge of cryptograms as well as your skill at solving them. See more »

Cryptoquotes are fun word puzzles, but how did these brain games get their start? Take this quiz to test your knowledge about cryptology and how to solve cryptoquotes. See more »

How much do you know about Futoshiki puzzles? Put on your thinking caps and work your way through our quiz. See more »

As fun as they are, most traditional puzzles can fall a little flat. However, 3-D puzzles – made from plastic, wood, fabric and more -- have been boggling minds for centuries. What separates 3-D puzzles from their two-dimensional brethren? See more »

Word games can be fun (and frustrating) forms of entertainment, but if you're tired of the same old crosswords, why not try your hand at their puzzle cousins, acrostics? See more »

If you love the challenge of chess and can't get enough of the game, you can try out special chess puzzles to improve your skills. See more »

First used for confidential messages during times of war, cryptograms have now evolved into leisure-time puzzles. What are some of the keys to breaking the codes? See more »

Although (or perhaps because) no lives are at stake when you decipher a cryptoquote, these cryptology-based word puzzles are a brain game for the ages. See more »

Puzzle boxes were originally created in Japan as a way to thwart thieves. Today, they're popular around the globe as decorative brain teasers. Here's how they work. See more »