Willy Mesmer from Swisslos, which is also responsible for Totogoal, a football betting service, says match-rigging around the world is one of the biggest threats for football and sport in general.

International investigators believe 200 games to have been rigged, including three in the qualifying stages of the Champions League and 12 in the Europa League, the continent's second-tier competition. Police have arrested 15 people in Germany and two in Switzerland.

In Switzerland, 22 games are under suspicion.

On April 26, according to Swiss newspaper reports, players for FC Thun ñ a second division team ñ received Ä15,000 (SFr22,690) to lose by four goals. The game ended 5-1 for Yverdon.

FC Gossau is said to have received Ä20,000 to lose by at least two goals to Locarno on May 24. Locarno won 4-0. The return on investment for the match fixers is believed to have been Ä149,000.

Earlier this month first division Bulgarian club Lokomotiv Mezdra played two friendlies in Switzerland ñ against Young Boys Bern and Aarau ñ and lost 5-0 both times. Against Bern the final two goals were an own goal and a penalty.

swissinfo.ch: How is it possible for so many matches in so many countries to be hit by this betting scandal?

Willy Mesmer: The more money is involved in a game, the greater the danger of fraud and rigging. But this is true not only for sports or the betting world.

swissinfo.ch: Why are players in Switzerland's lower leagues involved?

W.M.: Bets on single events in leagues that attract less interest ñ such as those provided online in large numbers ñ offer much greater match-fixing possibilities than traditional sweepstakes. The new betting products are more "manipulation friendly", so to speak.

In the traditional sweepstake, you had to predict the outcomes of multiple games ñgenerally including those played in various countries. Such a format makes match-fixing all but impossible.

swissinfo.ch: Has the internet and the resultant globalisation of gambling contributed to a match-fixing trend, or do other reasons play a greater role?

W.M.: The internet has opened up completely new possibilities. In addition to the closely monitored "state" betting agencies for example, many dodgy outfits have sprung up, often based in offshore locations.

The sport betting market is enormous, with demand in Asia particularly large. Therefore many betting agencies include lower-level games or even those from the junior leagues.

But there's no way you can pin fraud exclusively to sport or the betting industry ñ humans having been deceiving each other since the dawn of time.

swissinfo.ch: Have bets on Swisslos also been affected?

W.M.: It's too soon to say how this scandal will affect Swisslos sports bets. We're assuming however that gamblers are perfectly capable of telling the difference between reputable and non-reputable betting agencies.

But global match-rigging is one of the biggest threats for football and sport in general ñ only doping comes close.

swissinfo.ch: Why are players increasingly corruptible?

W.M.: I think above all it's the desire for a quick buck. The new online possibilities have moved the spotlight onto football. But let's not forget that boxing for example has been discredited for years because of such machinations. Match manipulation has nothing to do with the "normal" demand for betting or gambling.

swissinfo.ch: How does betting work? What is a bookmaker, what is a betting agency? Where exactly is the profit?

W.M.: With bookmakers the odds generally depend on the betting behaviour of gamblers and above all the odds offered by competitors. With Swisslos on the other hand odds for predefined settlement periods are fixed, are based on systematic analyses of sports experts and are limited.

Unlike bookmakers, Swisslos doesn't take on any financial risk ñ instead it limits by defined limits for stakes and odds. Bookmakers knowingly take on risks, and often try to re-insure these ñ often unsuccessfully.

What's more, Swisslos doesn't have the same high dividend payout rate as bookmakers, who often allow unlimited stakes and offer variable rates.

swissinfo.ch: What can be done to prevent match-fixing?

W.M.: The number of events on which people can bet should be reduced. This current situation is largely the result of the unusual rise in betting possibilities and betting agencies. That makes effective controlling difficult.

At Swisslos, if excessively large stakes are placed on an single game or a combination of games, our electronic monitoring system reacts immediately.

All state lotteries put a lot of resources into the protection and integrity of sport. They were also the first to introduce a monitoring system and since 2005 have officially worked with Uefa and have reported all abnormal betting patterns.

Alexander K¸nzle, swissinfo.ch (Translated from German by Thomas Stephens)