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The Phone Revelation
Imagine you have a snapshot with a required phone number almost completely hidden by a pen. Would you be able to discovery, based on logical reasoning, what the number could be?
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The Phone Revelation
Bumping Squares
Bump the square tiles into each other to obtain a certain pattern. When a tile bumps another tile it changes its color to the color of the tile it bumps into. Multilevel sliding block puzzle set.
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Bumping Squares
Squares-Regions-Colors
When a blue part overlaps a yellow one a green part is created. Can you make just one improvement so that all color parts are of the same area?
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Squares-Regions-Colors
Stained Glass Unicursals
Only one of the six windows can be drawn with one line without taking the pencil off the paper. Which window is it?
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Stained Glass Unicursals
Balancing the Cubiminoes
A dozen of identically-looking cubes. Grouped into three solid pieces. One cube is lighter than the rest of them. Can you figure out the lighter cube with two weighings using the special scales?
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Balancing the Cubiminoes
The Four Hearts Puzzle
Slide a dozen of pieces around until four complete color hearts appear. Add more fun to your Happy Valentine's Day!
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The Four Hearts Puzzle
Olympic Coins 2
An array consisting of five identical coins reminds the Olympic Rings symbol. The goal sounds not very hard, but with each move a certain rule should be observed, and, moreover, the least possible number of moves should be employed.
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Olympic Coins 2
New Year's TriLights
One of the two festive puzzles created to celebrate both our first anniversary and the New Year 2008. The other one is Checkered X-Tree. We look forward to more puzzling in the Year 2008. Happy New Year!
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New Year's TriLights
Checkered X-Tree
One of the two festive puzzles created to celebrate both our first anniversary and the New Year 2008. The other one is New Year's TriLights. We look forward to more puzzling in the Year 2008. Happy New Year!
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Checkered X-Tree
Christmas Circle
This was our Christmas puzzle gift for 2007. A number of holiday characters create a circle, though some of them have to be exchanged in order the circle is correct. Make it correct using the minimum number of exchanges.
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Playing with Coin Garland
Playing with Coin Garland
Eight coins are arranged into a stylized Christmas Tree with three coins indicating a garland. The object is to change the location of the garland on the tree with each of the six challenges.
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Playing with Coin Garland
Close Numbers
All but one number of a certain arrangement are revealed on a grid. Find out the right number and the right cell it should be written in so that the grid-based pattern is finally complete.
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Close Numbers
Book Pages
Having revealed just two fragments of the book's page numbers would it be enough for you to come to a definite logical conclusion what is the total number of pages in the book?
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Book Pages
Triangle to Square
Is it possible to draw a perfect square using just an irregular piece of paper, an ordinary pencil and an unusual ruler in the shape of an equilateral triangle? Would it be enough to complete the task successfully?
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Triangle to Square
Pumpkin Glow
Take a little break and have some fun before departing to your favorite Halloween party. Just line up the pumpkins and get some of them glowing. Charge your brain with the smart festive energy!
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Pumpkin Glow
Two Glasses
Each of the two glasses can contain 600ml of water. Can you get exactly 400ml in one glass and exactly 300ml in another without any additional measuring tools except for the glasses themselves?
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Two Glasses
Evergreens
Two letters are missing - each one in respective evergreen. Discover the letters, whether they are the same or different, and fill out the empty spaces to finish both flowers. What are these letters and why?
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Evergreens
SketchFrame
They all suppose to possess something in common. But one of them is missing. Figuring it out is the goal to reach. Which one it can be so that the entire sequence is restored? What sketched ideas can you come up with?
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SketchFrame
NEWS Guide
Very often it's hard to decide between just two directions to stick to the one of them. This is a challenge to choose between eight directions where the final choice is not limited to the only direction but is multidirectional instead.
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NEWS Guide
Downsize 2x2
It's not that easy when the challenge is to increase the area in a matchstick puzzle. When the challenge is to decrease the area it sounds like to be a much easier task. Or could it happen to be a wrong impression instead?
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Downsize 2x2
Hexaframes
Would it be possible to create several more regular hexagons from the four transparent hexagons? They can be of any size, they only have to be regular. If the answer to the question is "yes", then what is the limit?
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Hexaframes
Always Three
Six identical coins can be easily arranged in the shape of a perfect triangle. Then it can be easily turned at 180 degrees with the help of two single moves. But what if the additional rule is always to keep three rows of three coins each after every single move?
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Always Three
Lily Pads
Six lily pads are at your disposal already. When all of them are placed on the pond will be there a room for two additional lily pads to appear on the surface? And, by the way, all the lily pads have to be rotated identically.
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Lily Pads
The KC Office Puzzle
Planning a floor in any building is never easy. It becomes even harder when some additional conditions should be embraced. Would you like to check your skills and abilities in a kind of floor-planning job with this distance-optimizing puzzle?
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The KC Office Puzzle
One Magic Square
A Magic Square is a number square in which the digits in each row, column and two main diagonals add up to the same number. With this puzzle the challenge is not only to figure out the correct places for each digit, but first to discover the digits themselves!
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One Magic Square
Dieangles
If it is known a trio of pips on the faces of an ordinary playing die can lie in the vertices of an equilateral triangle, how many such trios can you find yourself? How easy this triangle quest through the die’s pips can be?
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Dieangles
Simple NEO ONE
One word can be rearranged into another with a series of simple moves. The only difference is in their colors. Your goal is to slide the letters to exchange the words' colors but retain the meaning. The less moves it takes the better.
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Simple NEO ONE
The Wigwam
Ten matchsticks are arranged into a shape which in turn has to be divided into two parts with the help of two extra matchsticks. There is no need to care about the parts' shapes. The main objective is to have their areas equal.
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The Wigwam
Cut off the Corners
A number of coins placed in the cells of a square grid create a number of right angles. Can you move some coins to some other cells so that to get rid of right angles completely? What would be the minimum number of moves?
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Cut off the Corners
The 4P Toothpick Challenge
In a group of four there is someone who desires to be selected the most, and someone who desires to be selected the least. Which strategy each of them should hold to so that their odds to obtain the desired result are the highest possible?
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The 4P Toothpick Challenge
The Checkered TOY
Assemble a set of checkered pieces into the TOY word. Then rearrange them and make a regular chessboard. A 2-in-1 puzzle with the key rule to keep the light and shaded cells properly alternating and coinciding with the respective colors on the board.
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The Checkered TOY
Get the One
It's quite a straightforward challenge when you have the distance of X to get the distance of 2X. But what about the vice versa challenge, when you have 2X and the goal is to get X? No bending, no cutting, no damaging, just fair drawing and measuring.
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Get the One
Skew Slide
Slide the red and yellow tiles within the board to reach the goal position in less than 32 moves. To slide the pieces click them following the guidance of the highlighted arrows. A light optimization Sliding block puzzle.
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Skew Slide
Hexagons Plus
When cubes are arranged in one way a number of regular hexagons can be seen. When the same cubes are arranged in a little bit different way one more hexagon would appear. Can you discover where the extra hexagon is hidden?
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Hexagons Plus
Coupled Hearts
Create 14 couples of hearts adjusting them to neighboring cells as if they always belong together. Challenge your sweetheart before you say a word. Your St. Valentine’s Day puzzle.
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Coupled Hearts
What's Next?
What comes next? A typical question with any sequence-based challenge. The only thing left is to get on the idea what the sequence is actually about...
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What's Next?
Change the Total
Eleven matchsticks, three numbers, one total. It is known when one matchstick is moved to another position it can add 1 to the total. What matchstick is it and what position it should be moved to? Will it be tough?
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Change the Total
What's in the Square?
Three squares are already filled out. The fourth one is still empty. Can you replace the question mark in that last square with some drawing and finish the pattern? What should be drawn there in the square?
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What's in the Square?
Tetramino Checkers
Five transparent pieces. Each one contains a different tetramino shape on it with black & white cells. The goal is to stack the five pieces up so that a regular 4x4 chessboard (tetraboard) would appear.
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Tetramino Checkers
Olympic Coins
Rearrange a bunch of coins within the Olympic Rings symbol following the set of simple rules provided. Does it look like an Olympic task for champions only? And what will be more important: the participation or the victory?
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Olympic Coins
Festive Ignition
Decorate Christmas tree with the color ornaments to light it in a special way and style. Add more ignition to your winter holidays and make them brighter. Happy New Year 2007!
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Festive Ignition
 
    Last Updated:
August 31, 2008
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