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Law of The Third

Online Roulette Guide

Best Casinos for the Law of the Third

law of the thirds

Here is a quick guide to Law of The Third roulette system. Please also read the notes at the bottom of the page. This system is similar in some ways to the Pivot System, in that you try and “fish” for numbers that repeat. Or in other words, you are looking for “hot numbers”.

Play the Law of the Thirds at 32Red

There are a number of systems that use thirds- another one worth looking at is the Tier et Tout system. This system (like the Dozens to Columns Switch) uses the 2:1 Outside bets- the Columns and Dozens.

Is there such a thing? See below- we explain.

The Law of The Third:

Here’s how to play Law of The Third Systems. There are various systems that have been developed to try and capitalise on this statistical law- below is an example.

Quick Guide to a Law of The Third Roulette System (More Detail Below)

  1. Write down the numbers as you sit it out at the wheel (if you are playing online you can make single unit low risk bets like 1 on red, 1 on even etc)
  2. Wait for 9 different numbers to drop in
  3. Wait 2 spins
  4. Bet on all 9 numbers for 3 spins.
  5. Stop.


  • Easy to implement
  • Controlled risk (only 3 bets)


  • You need to sit it out before you play, which is difficult online. You can just low bet red/black at the beginning for a minimum risk.
  • Assumes the wheel has a memory- which is doesn’t

More Detailed Description

Law of The 3rd System

There are various roulette systems that have been inspired by a statistical theory called The Law of The Third. Notice, we say “inspired”, as we want to be quite clear here- the theory has been adapted. That doesn’t necessarily mean that these systems work for roulette. It’s an interesting concept though, and worth a look.

Let´s take a quick run through of how the Law of The Third works, which is all about statistical distribution, applies when you play roulette.
Let’s imagine we are sitting around a European roulette table, with a wheel that has 18 red pockets, 18 black pockets and a zero pocket which is green. The total number of pockets is 37. So the odds of you guessing the right number on the next spin is 1 in 37, approximately 3%.

Not a huge number. But if you map out the distribution of numbers over time, what The Law of The Third predicts is that on average, after you have seen 37 rounds of roulette, roughly two thirds of the numbers (say around 25) will appear 1 or more times and one third of the numbers will be no-shows (around 12). Try it yourself and see what we mean. Similarly, 20 spins gives out around 15 numbers and if you watch for 9 spins, only 6 may drop in (the lower the number, the more volatile this gets- the sample becomes too small).,

Remember, we are talking statistics here- this is not an exact science, but it is amazing how often you will see this “pattern”.

Well, this phenomenon (like a bell curve of distribution on a chart) is used by some people to get an edge at the table. Well, that is what they chase, in any case. let’s have a look.

One system we have seen, hinges on the every 9 spins 6 numbers appear theory. In this system, you wait for 9 unique numbers in a row, then you sit out another couple of spins (the safety stop), and you then play the 9 numbers for 3 spins in a row (flat betting- keep the same bet for all 3 bets). You are fishing for Law of Thirds repeaters. This pattern is one of the reasons that people like to bet on the dozens or the columns bet, both of which neatly split the wheel up into thirds (well almost, if we ignore that pesky 0 pocket for a moment)

Why the safety stop? Well, I think that is more of an empirical thing- this worked when the system was being developed.

So is this science or just gobbledeegook?

Well, the bottom line is that the roulette wheel has no memory. And this system is hinting that the result of a spin is affected somehow by a historical event. So there is your big flaw. There are other “hot zone” strategies out there like the Quadrant roulette strategy, with which you will run in to the same problems.

The problem with these kinds of distribution modelling systems, is that they are modelling a group of spins (in this case 37) whereas you are betting on an individual spin. And therein lies the problem. If you were making a bet on whether 24 numbers would hit over the next 37 spins, then it has more legs.

So play this system, but play it purely as a money management technique (to help you set a time to leave the table after you have hit a profit or hit your loss limit).
But don’t play it thinking it will somehow magically improve your odds at the table. It won’t.

Where to Play The Law of The Third Systems

Try this on the 3D Roulette Paddy Power Casino. This is a great variant, and Paddy Power is a roulette friendly casino. They have a £5 no deposit offer at the moment.