Four coins are in the position of this picture. Move one coin at a
time, four moves, so that they form a direct line, and so that after
each move, the coin that was moved touches two other coins.
Four coins are in the position of this picture. Move one coin at a
time, four moves, so that they form a direct line, and so that after
each move, the coin that was moved touches two other coins.
It's in two dimensions, i.e. coins are not moved on top of each
other. This is probably quite easy.
Published in Njet Problem! collection 1996-05-29.
