Features
 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? Solve >
 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. Solve >
 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? Solve >
 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? Solve >
 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? Solve >
 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! Solve >
 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. Solve >
 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! Solve >
 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! Solve >
 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. Solve >
 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. Solve >
 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. Solve >
 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? Solve >
 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? Solve >
 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! Solve >
 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? Solve >
 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? Solve >
 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? Solve >
 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. Solve >
 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? Solve >
 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? Solve >
 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? Solve >
 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. Solve >
 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? Solve >
 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! Solve >
 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? Solve >
 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. Solve >
 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. Solve >
 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? Solve >
 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? Solve >
 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. Solve >
 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. Solve >
 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. Solve >
 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? Solve >
 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. Solve >
 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... Solve >
 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? Solve >
 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? Solve >
 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. Solve >
 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? Solve >
 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! Solve >

Last Updated:
August 31, 2008