Posts Tagged leopardstown
Betfair to compensate Leopardstown losers
Posted by Peter Webb in Betfair, Horse Racing on January 11th, 2012
Hot off the press, just received this email from Betfair: -
“Dear Peter,
Since the 2.00pm race at Leopardstown on 28 December 2011, we’ve looked in detail at all the circumstances surrounding the technology failure and the anomaly it created. In addition, we provided our Gibraltar regulator, the Gibraltar Gambling Commissioner (GGC), with a detailed technical and operational report on the incident and the GGC made a number of recommendations. We have also consulted with customers and taken their feedback on board.
Accordingly, we have reviewed our decision to void all in-running bets matched on the race and, in the interests of fairness, certain categories of voided bets will be compensated by way of ex gratia payments from Betfair. This compensation complies with, and goes beyond, the GGC’s recommendations.
The categories of bets that will be compensated are:
- In-play winning positions in both the ‘win’ and the ‘to be placed’ markets which were achieved before the technology failure; and
- In-play winning positions in the ‘to be placed’ market achieved at any time through to the completion of the race.
Bets matched in the ‘win’ market after the technology failure will remain void.
As your bets were placed in one of the two categories described above, a payment reflecting your winnings had the relevant bets not been voided, will be made to your Betfair account today.
Once again we would like to apologise for the inconvenience caused, and the time taken to reach this outcome. We do thank you for your continued support and remain committed to providing you with the best betting proposition possible.
Regards,
The Betfair Racing team”
£1k account caused £600m Betfair error
Posted by Peter Webb in Betfair on December 30th, 2011
Betfair have issued a statement this afternoon outlining the error that caused the exchange to misfire. The full statement is here: -
But here are some bullet points:-
“This bet was placed by one of our UK customers trading the race via our API or Application Programming Interface (bdp.betfair.com/) using an automated program (a “bot”). Their bot had developed a fault causing it to try and place a very large number of bets on the Exchange. These bets were large in size and mispriced…… However, due to a technical glitch within the core exchange database, one of the bets evaded the prevention system and was shown on the site. This was an issue that was triggered because of a unique sequence of events that had never happened before.” – “In this case, the customer had less than £1,000 in their account so none of these bets should have been accepted.”
“The Betfair technical teams continued to investigate the details of the fault and, having identified the issue, worked on putting a fix in place which was applied at 10.15pm on December 28th.”
“Following extensive testing, we can confirm that there have been no subsequent occurrences of this fault and we’ve taken steps to prevent its reoccurrence in the future.”
“Again, I would like to clarify that the account in question has no commercial relationship with Betfair other than being a customer. Our reputation has been built on integrity and we have been pioneers in the industry in ensuring that betting is carried out in a fair and transparent manner. By making the voiding decision, I can assure you that this decision was not taken lightly and that we have implemented what we believe to be the fairest solution in these truly exceptional circumstances.”
How to lay £600m worth of bets on Betfair?
Posted by Peter Webb in Betfair on December 29th, 2011
That has to be the #1 question after yesterdays debacle in one of the feature races at Leopardstown.
To summarise, a mysterious lay bet appeared and stayed on the winning favourite at 29′s right up to the finish of the race. The ‘layer’ offered up £21m at 29′s creating a £600m liability. Betfair voided the in-running market.
Betfair have come out officially and ruled out that it was them or any account controlled by them or that they had a commercial interest in it. So it would appear it was just a common lay that created the error. But the question now shifts to who was this layer and how did they create the error? Nobody on the planet has £600m to gamble on a single runner in a race, so that points to some system quirk. There are checks in place that stop you exceeding your account balance or exposure limit, so what could jump over both those hurdles?
The amount of the Lay was curiously near the value of a 32bit binary number, slightly over if you add in additional stakes. The range of values of a 32bit binary is -2147483648 to +2147483647 which fits with the stake amount displayed on Betfair. You can create an error by forcing overflow or underflow with a calculation involving an integer, so it’s not impossible that this could be the source of the error. There is a good explanation on this link, curiously to do with customer balances: -
http://weblogs.asp.net/dvravikanth/archive/2008/03/10/integer-overflow-amp-underflow-revisited.aspx
I can’t comment authoritatively on the way that Betfair have coded their back-end, but lets just say that it’s not impossible that something like this could be the cause of the error. It could be that the exposure calculation is done using an integer and this layer just fluked it somehow. If it is something like this, then I am pretty sure an arms race is already underway to exploit it. The ability to force a voided market is potentially quite valuable, so Betfair should announce what the error is and what they are going to do to solve it, immediately. The person who placed the bets knows what created it, so that layer is hot property at the moment!
By quoting terms and conditions to void the market, people were quick to spot contradictory terms that stated that in the event of a bet exceeding agreed exposure all bets will stand, whoops! You can find the clause under section 9. Has Betfair has possibly opened themselves up to a legal issue?
I get the feeling this story is going to rumble on for a fair bit. But I sense we are nearer an explanation.
Leonhard Euler proved in 1772 that 2,147,483,647 was a prime number
Biggest ever loss on Betfair?
Posted by Peter Webb in Betfair on December 28th, 2011
One of those remarkable events happened today on Betfair when, in the Christmas hurdle at Leopardstown, Voler La Vedette was offered up in-running for massive money at massive prices despite the fact it won.
Seemingly, over £21m was offered and held in-running to get filled at HUGE prices. £1,642,094 was matched at 29′s meaning the loser would have to pay out £44.8m on their bet at 29′s. In order to be able to just place the bet the user would have needed near on £600m in their account. Which is of course impossible, as all the users added up at Betfair don’t have those funds available.
Massive speculation abounds on what could have possibly caused, what looks like a catastrophic error. Was this a system error at Betfair, a bot error, or something unknown. Have Betfair just taking a massive bath due to an errant bit of code or did somebody else? How could such amounts be offered at such prices? It looks like a bug / system error to me, but early reported discussions with Betfair helpdesk indicate that it is not an error. I guess we will have to wait and see. Some people have reportedly made significant profits from the glitch, however it occurred. The market is still suspended and we await an outcome.
Read all about it in the forum
Looking for the luck of the Irish
Posted by Peter Webb in Bet Angel on December 28th, 2011
Their economy may been in the dumps, but then that’s no shock in the western world economies; but the racing is top notch this week at Leopardstown.
The holiday racing cards are packed with races which can cause some problems at times, but outside of that the feature races where-ever they are, are often worth a look.
Today at Leopardstown it’s the Lexus chase and then tomorrow, the Festival hurdle. If you are around, don’t rule out anything on the card in this busy period. But have a go at some of the features, even if they are not in the UK. They can work quite well. That said the Lexus chase today looks a little tricky.
