The numbers on the side and bottom of the grid indicate occupied squares or groups of consecutive occupied squares in each row or column. Can finish the grid so that it contains three Cruisers, three Launches and three Buoys and the numbers tally?
Read MoreLogic Puzzles
Psycho Games
Synaptic Puzzles to enhance mental flexibility.
Read MoreBridges
Connect the islands up so that they have the number of bridges shown.
Read MoreBattery Pack
Each rectangle contains either a battery with a positive (+) and negative (–) pole OR a dud wooden block which does nothing. The numbers along the top and left indicate how many positive poles there are in that row or column; likewise for the other numbers showing the number of negative poles.
Read MoreBaker Street Puzzle Strip
A detective cartoon strip incorporating a taxing problem, based on the tales of Sherlock Holmes by Conan Doyle.
Read MoreKnot Puzzles
Entertaining and perplexing rope puzzles.
Read MoreMatchstick Puzzles
Gianni, founder of Archimedes' Lab Project™ has written an extensive collection of books in several languages on brain training, critical thinking, visual art, and on the mechanism of vision.
Read more at: https://www.giannisarcone.com/
Baker Street Puzzles
Join the famous detective Sherlock Holmes and his trusty colleague, Doctor Watson, in the many problems, dilemmas, and mysteries they encounter while trying to apprehend the infamous Professor Moriarty and other fiendish felons.
Uncover plots, reveal murderers, unmask liars and recover stolen goods, as you complete these lively logic puzzles, codes, anagrams, number puzzles, and of course, who dunits. Use your deductive powers to right wrongs and prevent crimes, while you deal with the esteemed Inspector Lestrade of Scotland Yard, Mrs. Hudson, Holmes’ household manager, and all the other characters you’ll encounter in and around 221B Baker Street.
Read MoreThink Tank
Weekly puzzle problems devised David J. Bodycombe, Games consultant and puzzle writer; currently Question Editor for BBC4's Only Connect and author of Penguin Sudoku books.
Read MoreTraffic Lights
Complete the grid so that each row and column contains a red, orange and green light. The lights at the end of each column and row tell you the colour of the red light you will meet if you travel in that direction down the column or row.
Read MoreShikaku
Divide the Shikaku grid into rectangles. Each rectangle must contain a single number, and that number must describe exactly how many boxes there are in the rectangle.
Read MoreTakuzu
Each row and column contains the same number of O and X. The same symbol never appears in three adjacent cells, horizontally or vertically (e.g. ?XX? must be OXXO). Also, each row and each column is unique.
Read MorePar Four
You have four shots in which to get your golf ball upwards from the tee to the hole. Choose one each from the Drive, Iron, Chip and Putt selections. Each shot goes straight from the starting to finishing square. Only one combination will get you in the hole and you may never land o the grid, in a tree or in a bunker.
Read MoreLatin Square
Complete the grid so that every row and column, and every outlined area, contains the letters A to G.
Read MoreBlock Lock
Which two of these block piles could be tted neatly together to make a perfect 3 x 3 x 3 cube?
Read MoreGeo Mouse
Geometric problems to solve with a piece of cheese.
Read MoreTents and Trees
For every tree you must mark a tent horizontally or vertically adjacent to it. No tent can be in an adjacent square to another tent (even diagonally) but a tree can border any number of tents. The numbers by each row and column tell you how many tents there should be in that row or column. Can you locate all the tents?
Read MoreMatchstick Puzzles
Visual and spacial brain-teasers
Read MoreQuipus
Challenge both your logic abilities
and your visual perception at the same time using
“Quipus”.
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Gear and Belt Puzzles
Puzzles involving a fitness treadmill and Fred, Gianni's hamster!
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