See also: Riddles • Optical Illusions • Sudoku • Mathematical • Nonograms • Cryptograms
Thinking Game Forums
infordigital.com
Chat and discussion about online thinking games.
Eye-Pleasing, Mind-Teasing 3-D Conundrums
kreszbrothers.com
Scans from a book of puzzles, includes English translations.
Puzzles Without Rules
geocities.com
Free, updated, original abstract puzzles for advanced puzzle-solvesr. Includes current unsolved puzzle and archive with hints and solutions.
Brain Teaser World
brainteaser-world.com
Offers riddles, puzzles, optical illusions, and magic tricks.
Braingle - Brain Teasers & Riddles
braingle.com
Contains a huge collection of user submitted and rated brain teasers and riddles. It also has a lively message board and some unique multiplayer games.
Confusion
cnfsn.tripod.com
Its a challenge to reach the end of this puzzle maze.
All-Star Puzzles: Logic Problems
allstarpuzzles.com
Collection of logic problems to solve. Printable.
Brain Teasers
hlavolamy.szm.sk
Brain teasers, riddles, logic puzzles and problems, paradoxes, optical illusions, IQ tests and logical games.
Brain Juice
brainj.net
An assortment of entertaining logic puzzles with solutions and indicated levels of difficulties.
Planetarium
beholder.co.uk
An on-line puzzle story in twelve weekly installments.
The Grey Labyrinth
greylabyrinth.com
A beautifully illustrated collection of puzzles, riddles, and paradoxes. Features a changing "unsolved puzzle" plus three years worth of previous puzzles.
Word Juxtapoz
wordjuxtapoz.com
Word puzzles, riddles, rebuses, brain teasers, mazes, cliparts and pictures.
Archimedes' Laboratory
archimedes-lab.org
Recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and curiosities.
Had To Play On
hadtoplayon.com
A community based site with competitions, challenges, awards, a help centre, forums and games.
BrainBoggled.com
brainboggled.com
A collection of math, logic, and word puzzles.
BrainBall
brainball.playmindgames.com
A daily brain puzzle with 10 different tasks and a variety of statistics on your performance.
AVAV
kuponh.karoo.net
Collection of optical illusions, brain teasers and riddles.
Eyetricks: Brain Teasers
eyetricks.com
Weekly puzzles and archives.
Able2Know
able2know.com
Message board of user submitted riddles and brain teasers.
Alphabet Cartoon Puzzles
home.ca.inter.net
Letters of the alphabet are used as structural components for drawings of figures and faces. Spelling tips lead to the solution of the puzzles.
Zuzzle Puzzles
zuzzle.com
Collection of puzzles including riddles, logic puzzles and sequential puzzles.
Game-Master's Page
game-master.us
Riddles, games, cryprograms, math puzzles, and forums.
Gray Watson's Brain Teasers and Riddles
256.com
A collection of brain teasers and riddles with a guess button.
BrainBashers
brainbashers.com
Brain teasers, puzzles, riddles, games and optical illusions.
Roh'El's Riddles
users.telenet.be
Offers brainteasers rated by difficulty and category.
Pzzls
pzzls.com
A collection of logic puzzles, riddles and brain teasers.
Analytical Puzzles
nickvautier.com
List of logic puzzles grouped by difficulty.
Logic Puzzles Escapades
nzorgan.com
Logic puzzles with a satirical New Zealand tone.
Shashi's Homepage
me.iitb.ac.in
Collection of puzzles, riddles and brain teasers.
The Logic Zone
myweb.tiscali.co.uk
Collection of problems with answers, logic puzzles and cryptograms.
Curiouser.co.uk
curiouser.co.uk
Paradoxes, puzzles, games, optical illusions, poetry, curious facts, and quotations.
Puzzle Contest Center
contestcen.com
Riddles, brainteasers, cryptograms, anagrams, and logic puzzles. Compete in eight new contests monthly.
BrainVista
brainvista.com
Collection of solved and unsolved brain teasers.
Sesquip Word Games
sesquip.com
Challenging word games published in newspapers.
PedagoNet Brainers
pedagonet.com
Over 60 brain teasers to enhance your mind.
Abnorm's Conundrums
angelfire.com
Easy, medium and difficult brain teasers without answers.
Bill's Brain Teasers
billsgames.com
A collection of visual and linguistic riddles.
A Game A Day
agameaday.com
A puzzle site featuring a new puzzle format each weekday for each month. Puzzles are fun, educational, entertaining and are also printable.
The Stone
thestone.com
an online mystery game. Hours of clever puzzles and riddles. Puzzles challenge the mind of serious and amateur players worldwide.
iRIDDLER
iriddler.com
Challenge your mind with free online riddles/puzzles, logic games, brain teasers and view optical illusions.
Puzzability
puzzability.com
Some real mind benders here.
Say What You See!
eyetricks.com
Collection of visual brain teasers which can be solved by saying what you see.
Rec.puzzles Archive
rec-puzzles.org
An archive of many popular puzzles from the rec.puzzles newsgroup.
A Puzzlemakers Site
puzzlemakers.net
Puzzles of all descriptions.
National Puzzlers' League
puzzlers.org
Crosswords & other word puzzles and games, samples; monthly puzzle magazine; 800,000 word searchable list.
Professor Tangent
professortangent.org
Have fun with games, puzzles, brainteasers and humor as you learn about logic and analysis.
Eluzions
eluzions.com
Featuring all sorts of games, optical illusions, puzzles, trivia, mazes, and magic tricks. Suitable for all ages.
Unitix Entertainment
unitix.com
Online games, puzzles and other interactive brainteasers. Fun for all ages.
The Amazing Art Site
members.lycos.nl
Huge collection of optical illusions, hidden imagery, ambiguous art and upside downs.
Just Riddles and More
justriddlesandmore.com
Riddles, illusions, puzzles, and brain teasers.