A sea serpent lies hidden under the surface of the water with only its
head, tail and a few other parts visible. Should it be hard to reveal its
entire body from head through tail, knowing it doesn't touch itself
anywhere?
You are an architect and you have to restore the labyrinth after the
fragments of an old plan. What would be your starting point through these
ancient walls?
Remove some coins from a big coin triangle containing ten coins and a lot
of smaller equilateral triangles so that no equilateral coin triangles
remain.
It can be a little Christmas puzzle gift to entertain you for a few
minutes at least - only three triangles hidden in a Christmas Tree and the
extra one that has to be found.
If several silhouettes are superimposed in a pile in some certain way a
silhouette of a rabbit can appear. Moreover two different rabbit's
silhouettes can be obtained. Can you find them both?
Color the points of a "web"
into two colors - red and blue - in such a way that do not allow any
sequence of three points of the same color be found in a single line.
Do you think it is hard enough to assemble 14 different pieces into a
regular 8x8 checkerboard? Isn't there any connection between the name and
the puzzle itself?
Light a couple of stars in each column, each row and each region in the
blue sky. No star can touch each other, even diagonally. No guessing while
solving, only logical reasoning is required. Thus, how long it will take
you to light all the stars? By Zoltán Horváth.
Five squares are cut in one way to create five identical pairs of pieces.
The resulting set of ten pieces is very appropriate to try yourself in
completing some nice shapes from it...
Twenty tessellated square tiles each one consisting of four color cells.
Your goal is just to select 16 of them and arrange the square in which
every cell matches color to color.
Twenty tessellated square tiles each one consisting of four color cells.
Your goal is just to select 16 of them and arrange the square in which
every cell matches color to color.
Two weighings are required to identify the heavier thing among the four
identical ones. Two weighings are required for the nine things as well.
But how on it in the latter case?..
Put a set of nine jigsaw-like pieces into a special grid. A
distinctive feature of the challenge is that there is a definite
logical place and order for each piece to be located within the grid.
The goal is only to discover it!
Seven pieces are already fitted into a square table top. One is left, and,
unfortunately, the cabinetmaker doesn't know how to be with it. Can you
help him to solve this fitting challenge?
