You may have noticed the podcast is a bit late this week and there's a simple reason

for this.

We made a silly error on the programme which was spotted just before it went out on

the World Service Radio.

Now our first instinct was to change the podcast too so that no one would know we'd

made a mistake.

But on reflection, we've decided to keep it in and let you the audience see if you can

spot the error.

So enjoy this tale of chess cheating and the hunt for the greatest of all time from

David Edmunds.

I don't worry if you miss the error, we'll tell you at the end.

Hello and welcome to More or Less on the BBC World Service, where you'll weekly guide

to the numbers all around us.

I'm David Edmunds.

Let's start today by playing a game beloved of sports fans.

Is Lionel Messi a better football player than Pele in his prime?

Who's the better golfer, Tiger Woods or Jack Nicholson?

How about this one?

Is the current world chess champion Magnus Carlson a stronger player than the most famous

chess player in history, Bobby Fisher?

Well, that's a question to which there may be an objective answer.

You can hear it at the end of the programme.

...