Sudoku123.ca is home to the 'Sudoku challenge among friends and relatives', a multiplayer Sudoku variant with scores for 2 to 5 people.
RESUKO© is a new, exciting and innovative logic riddle from Switzerland.
Cosmic Publishing is a Tokyo based company specializing in puzzle magazines and puzzle books. The website offers free trial puzzles as well as Cosmic's latest puzzle magazine, prizes and a company blog.
Introducing various brain exercising games including mini games, Rubik's Cube and logic puzzles.
A web part of a puzzle-book-web project entitled Age of Puzzles. The project makes a comprehensive mosaic of puzzles created by different people in different time and at different places.
Leonid Mochalov of puzzlemochalovlp.com is a Russian puzzle creator and author. Amongst his creations are puzzles such as Pyramid and Chess Cube as well as new types of riddles such as SQUAREWORDS, LABYRINTH-NUMBER and EXPRESS-LABYRINTH.
Puztime is Gakken’s comprehensive online puzzle portal designed for puzzle lovers all over the world. offers a variety of puzzles including unique variations of Number Place, Illust Logic puzzles that reveal whimsical images when completed, Cross Sums with Chinese characters, mazes and much more.
Yariv's World of CryptoPics offers its own variation of Nonograms (PAP), downloadable software with a library of extra puzzles to play with it, and a page of CryptoPic and other puzzle links.
MagicCube4D is a fully functional four-dimensional analog of Rubik's cube. The 4D face is composed of a 3 dimensional block of 3D stickers. The 4D cube has more potential positions than the total number of atoms in the universe.
Math puzzles and problems collected by Ken Duisenberg.
PuzzleDepot.Com challenges your brain with free puzzles, Shockwave and Flash games, crosswords, logic games, IQ tests, trivia games and contests for prizes.
See if your brain is up to the task! flooble :: perplexus is a collection various puzzle genres, from simple logic questions and word tricks to in-depth math problems like probability and geometry.
All puzzles on this site are Robert A. Kraus’ original work. Most of them are very difficult, and most require the use of a good spreadsheet program in order to be solved. It will take many hours, perhaps days, to solve each puzzle.
Mathematicians seek knowledge. In search of knowledge, they enjoy themselves tremendously inventing and solving new problems. Interactive Mathematics Miscellany and Puzzles makes an attempt to present mathematics as an evolving and entertaining subject in which an unsuspecting visitor may take an active part.
Find information about language and culture independent puzzles and logic games that are published in puzzle magazines: Domino Logic, Number places, Battleship puzzles and more.
The largest place in the German language Web denoted to puzzles, riddles and other brain food.
A great collection of Fair Dice, Iamonds, Eternity, Mazes, Atom Stability, Dissections, Kites&Bricks, Triangles, Retrograde, Pentagons, Prize Problems, Books, Links, Chaos Tiles, and Partridges by Ed Pegg Jr.
From Tricky and Clever Puzzles through Baffling and Perplexing Illusions to Cognitive Toys.
Puzzle projects by Peter Grabarchuk, including puzzle products, books and publications, web puzzles and other puzzle activities.