Logic puzzles
Puzzle Japan in Japanese
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Puzzle Japan in English (puzzle tutorials & hints, free beginner and sample puzzles, and a daily subscription service)
Puzzle Japan [This site releases at least three new puzzles every day.]
Official website in Japanese
Official website in English
web Nikoli
timhalbert.com - daily ''Number Link'' in Microsoft Excel format
Tim Halbert - Number Link
Nikoli's English page on ''Number Link'' puzzles
Number Link :web Nikoli
Nurikabe is NP-Complete (Adobe Acrobat Reader required)
http://www.froola.com for you!
Nurikabe at janko.at (German; Java required for sample puzzles)
Nurikabe [janko.at]
Tutorial at Puzzle Japan (the Nikoli website) (Macromedia Flash required); use the tabs at the top of the page to view rules, study solving tips (under "Keys to solution"), and solve beginner and sample problems (Java Applets required)
Rules of Nurikabe
Everett Kaser's Descartes Enigma - inspired by Paint by Numbers and Nonograms
Everett Kaser Software - Descartes Enigma
Puzzle Japan: Edel - Subscription site with 10 free sample puzzles (also in Japanese)
Sample Problem of Edel [Puzzle Japan]
Playtsunami - Create and play free nonograms
Online Tsunami
NP-Completeness Results for Nonogram ( PostScript) - Paint by numbers is NP-complete
Conceptis – picture logic puzzles
Square-Off: Play unlimited number of nonograms on your computer!
Square-Off: an exciting logic game. Exercise your mind, and enjoy this wonderful japanese nonogram puzzle.
Blindchicken's Paint by Numbers games puzzles
Paint by Numbers
Griddlers.net - The largest online puzzles database default
Griddlers Net
Paint by numbers online
PBN Home Page
Nikoli's English page on ''Ripple Effect'' puzzles
Ripple Effect :web Nikoli
Theseus and the Minotaur mazes theseus
Theseus and the Minotaur
Nikoli's English page on ''Slither Link'' puzzles
Slither Link :web Nikoli
Sudoku Programmers Forum
Sudoku Programmers :: Index
Robert Abbott's notes on this puzzle notes
Further Notes on the Theseus and the Minotaur Mazes
The article from ''Games & Puzzles''
Games & Puzzles Magazine - Theseus and the Minotaur
A very lucid example from the Wadsworth online Cognitive Psychology laboratory experiments
CogLab: Wason Selection Task
Department of Psychology at UC Santa Barbara psych research cep
Here is the general structure of a Wason selection task
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Nikoli , Number Link , Nurikabe , Paint by numbers , Ripple Effect , Robert Abbott , Slither Link , Sudoku , Theseus and the Minotaur , Wason selection task , .
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