Diamond Coins

Diamond Coins

Rules can get in the way of finding solutions. Demonstrate how this works with a few coins and a flat surface.

Guide lines
Ready, Steady, Go!

Arrange four coins into a diamond pattern.


The challenge is to start from the diamond pattern and end up with all the coins in a straight line.

Lend me your ears

Now explain the rules.


You can move one coin at a time, but every time you move it and let go of it, it has to end up touching two other coins.

Seal the Deal and Reveal

Give the person time to try out a few moves, until they acknowledge that they can’t figure it out.


Ready for how to do it?

Reveal the moves in 4 steps, as seen in the photos.


You don’t have to have them all touching at the same time, but when they’re touching it has to be to two other coins. There’s no rule for non-moved coins.

Some extra lines you can try

  • You created rules in your mind that I never mentioned.
  • It just takes some out of the diamond thinking.
  • Diamonds can be ‘hard’ to figure out.
Alternative ending

Try going the other way, from a straight line to a diamond pattern, using the same rules.

Anticipated responses and retorts

How many coins do we need to buy a real diamond?

You got me there… but I got you too!

Has anyone figured this out yet?

I am waiting for that diamond in the rough.

Where do you learn all these cool coin puzzles?

Look on the Coolfidence site – there are lots of ‘em.
Good follow ups
When & where
When to use it
  • When you want to stimulate some creative thinking.
  • When you need to get people involved.
  • When you want to have some fun with coins.
Where to use it
  • the office canteen
  • informal meetings
  • team building events
  • cocktail parties
  • socializing at the pub
Getting ready
Items required
  • Four coins
  • Learn the method and you are all set.
Training required
  • Practice this a couple of times on your own.
Watch out (potential unexpected effects)
  • Don’t go through all your loose change.

type type

Do It Yourself (DIY)

material material

four coins

size size

coins should fit in your wallet

durability durability

coins are round – they may roll away

source source

the ether

time to impact time to impact

pretty much there and then

size of audience size of audience

one-on-one or a small group

possible health risk possible health risk

don’t spend your loose change on candy

reusable how many times you can use it

probably just once

training needed training needed

get familiar with the method and you are good to go

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