Diversions - Chess, Puzzles, IQ Tests, Trivia, Brain Teasers:

Flooble: Perplexus
A collection of puzzles from logic problems and word tricks to in-depth math like probability and geometry.

Interactive Mathematics Miscellany and Puzzles
Math puzzles and interactive activities.

International High IQ Society
Five IQ tests that measure different aspects of intelligence. Each test can be taken online FREE of charge, and the results will be provided immediately upon completion.

Internet Chess Club
Play chess with people from all over the world, get a rating, play in tournaments, and watch Grandmasters.

Lawhaha.com
Andrew McClurg's Legal Humor Headquarters. Comic relief for law students and lawyers from Professor McClurg, humorist for the American Bar Association journal and author of The Law School Trip (the insider's guide to law school). None of those ubiquitous lawyer jokes.

Mathpuzzle.com
Challenging math puzzles and mathematical recreations - with solutions if you are not up to the task.

One Across
Search for answers to crosswords.

Play Chess Against tkChess

Puzz.com
Puzzles, Analogies, IQ Tests, Brain Teasers, Trivia and more.

Technology Puzzle (New York Times)
A new technology-themed crossword puzzle each week.

Yahoo! Chess
Play chess against online opponents at various skill levels. Choose your comfort level.

Yahoo! Crossword
New interactive crossword puzzles daily.