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Among many thousands of different
puzzles there are ones which hardly can be put exactly
into some certain puzzle kind or type. So the best place
for such challenges is this section of our website. 





Mosaic Eggs

by
The Grabarchuk Family 
In the mosaic, find a pair of
exactly identical eggs. Note that they can be rotated
but not mirrored. Happy Easter!... 

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The Spiral Galaxy Mystery 
by
Serhiy Grabarchuk 
The stars that form this unique
spiral galaxy are Supernova, Nebula, Red Giant,
Protostar, White Dwarf, and Black Dwarf, as shown in the
Start position. Stars can move just along the lines of
the galaxy. Your star challenge is to move the stars to
the Goal position sliding one star at a time, in exactly
fifteen single sliding moves... 

Geduldspiele 
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Dicey Multiplication 
by Werner Miller 
Here is a novel version of
traditional play with numbers. The challenge is to
arrange "standard" dice into a pyramidal multiplication
with their top faces read out the factors of the
multiplication and the front faces read out the correct
product... 

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Parted Cube 
by
Peter Grabarchuk 
Each of the eight combinations of
four unit, 1 x 1 x 1 cubes fits within a transparent, 2
x 2 x 2 cube. Determine which two shapes can make a
whole, 2 x 2 x 2 cube when joined together? Keep in mind
that unit cubes in each shapes are separate (not joined)... 

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Twins 
by
Serhiy Grabarchuk 
Some of the nine shapes make pairs
consisting of two exactly identical shapes each. Shapes
of each pair are shown from different directions, but
never reflected. How many pairs can you recognize? Which
shapes make 'em?... 

Puzzles.COM 
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Hearts & Diamonds 
by
Serhiy Grabarchuk 
A circular plate decorated with
hearts and diamonds is made of two partsa smaller
central disk is placed in the middle of a bigger one.
There are more hearts than diamonds on the plate.
Rotating the central disk counterclockwise, you can make
the numbers of the hearts and the diamonds equal. One
additional diamond appears! Could you explain this?... 

Puzzles.COM 
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Holidays MerryGoRound 
by
Serhiy Grabarchuk 
Place fifteen balls on the nodes of
the star so that they make two words, HAPPY and
HOLIDAYS, separated with two asterisks. Sounds easy?
Well, there is one rule to be observed: To place a ball,
first put it on a vacant node of the star, and then move
it to another vacant node along a straight line segment
directly connecting them. Happy Puzzling!... 

play > 




Halloween Party 
Do you like puzzle nuts which are
hard and can tremble you?... Are you ready to give 'em a
try?... Click to enter the Party... Like a deep black
whirlpool it's absorbing... Trick or Treat?.. 

Puzzles.COM 
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> 




Christmas Circle 
by
Serhiy Grabarchuk, Jr. 
The Christmas Circle contains eight
different things related to the most peaceful holiday. But a
few things were put into wrong places on the Circle.
Make the minimum swaps to get the whole holiday
composition in the proper order... 

UniPuzzle.com 
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> 




Parted Square 
by
Peter Grabarchuk 
A subset of three squares should be
chosen from among six holed squares so that they can
form a nontransparent square pile. The challenge is
trickier than it can look at first glance... 

MathIsFun.com

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DoubleCube Snakes 
by
Peter Grabarchuk 
It's a folding challenge with 3D
shapes this time, and you have to determine which of
three snakelike folding shapes can form a 1x1x2 block,
when folded along the lines... 

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> 




Wire Pyramid 
by
Peter Grabarchuk 
A skeleton pyramid contains a
number of parallelepipeds. Our challenge will test your
skill of observation and systematic counting. So your
task is to spot and count within this construction all
those skeleton parallelepipeds... 

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> 




Beads Duo 
by
Peter Grabarchuk 
There are several beads of
different sizes placed in one plane. Just two distances
between some beads are equal. Your task is to find out
these bead pairs. Another test of your visual skill... 

MathIsFun.com 
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> 




Unfold the Prism 
by
Peter Grabarchuk 
This is a visual test of your
ability to fold some patterns into a solid without
making real models. Eight different patterns are
proposed, but just some of them can form a triangular
prism when folded along the lines. How many of them can
you spot? How long will it take you finding them all?... 

MathIsFun.com 
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> 




NEWS Guide 
by
Serhiy Grabarchuk, Jr. 
Five triangles can be changed into
arrows each pointing into one of the eight given
directions  four main and four additional. Your
navigational goal is to aim all the five final arrows so
that there are the equal numbers of all four main
directions... 

UniPuzzle.com 
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> 



