No two pearls from among those placed in the cells or a grid are in the
same row, column, or diagonal. Moving three of them it's still possible to
preserve the no-two-pearls-in-line arrangement.
This old puzzle is known for years because of its famous advertising
adaptation. Here it is given slightly redesigned, and with three extra
challenges.
Two equilateral triangles are created with the help of five identical
coins. Slide only two coins so that the equilateral triangles are now both
of different size.
An old tricky puzzle transformed for the matching card version. The idea
remains to distribute three ears between three hares to give every hare...
two ears.
A colorful set of seven pieces which have to be arranged into a Greek
cross. You can rotate the pieces or turn them over, but not overlap or
damage. How perfect your final shape of the cross will be?
More than two dozens of squares are hidden in a simple 4x4 match square
grid. But less than a dozen matches is required to be removed to destroy
all them for good.
Divide a square into some minimal set of pieces
so that while rearranged they could create two different shapes, one
resembling a cocoon and another - a butterfly.
