(CNN) -- Who'd be a referee? When the crowd aren't getting on your back you've got the players acting up or giving you an earful. 

So if someone described your refereeing as "the best," you could be forgiven for feeling a small surge of pride. But when the person praising you has been called the world's most notorious match fixer, then it's time to show yourself a red card. 

Wilson Raj Perumal says he corrupted many football players and officials during a long criminal career, but there is one person who stands out from the crowd. His name was Ibrahim Chaibou, a referee from Niger. 

"He was the best, he was the best, but not from FIFA's point of view," Perumal told CNN during a wide-ranging television interview about his match-fixing days. 

Perfect partner 

The Singaporean, who is now helping European police with match-fixing investigations, claims to have rigged the results of up to 100 matches over a 20-year period, boasting of a 70-80% success rate. 

Chaibou, who he describes as "very bold," became one of his favourite match officials. 

According to Perumal, the referee's first match fix was an international friendly between South Africa and Guatemala in May 2010 -- one of several warm-up matches played ahead of the 2010 World Cup which the Rainbow Nation hosted. 

Watching highlights of the game on YouTube, Perumal gives a running commentary on the major incidents. 

"It's crazy," Perumal says as Chaibou awards South Africa a penalty kick. The quality of the footage is poor, but the fixer knows what happened.  QUESTIONS:

Q1:
1. Who turned lots of football players immoral?
2. What man was the reason for a lot of football players' corruption?
3. 
Q2:
1. How many people stand out to Wilson Raj Perumal?
2. What is the number of people that are unique to Wilson Raj Perumal?
3. 
Q3:
1. Who stands out to Wilson Raj Perumal?
2. Which person does Wilson Raj Perumal describe as unique?
3. 
Q4:
1. Does Wilson Raj Perumal talk to CNN?
2. Does Wilson Raj Perumal provide CNN with information?
3. 
Q5:
1. What are Wilson Raj Perumal's remarks to CNN?
2. What does Wilson Raj Perumal tell CNN?
3. 
Q6:
1. What does Wilson Raj Perumal help European officers do?
2. What do European officers receive aid from Wilson Raj Perumal in dong?
3. 
Q7:
1. What is Wilson Raj Perumal's success rate?
2. What percentage of Wilson Raj Perumal's investigaions are successful?
3. 
Q8:
1. Where does Wilson Raj Perumal watch match highlights?
2. On what platform does Wilson Raj Perumal watch important points from games?
3. 
Q9:
1. What does Wilson Raj Perumal give on Youtube?
2. How does Wilson Raj Perumal appear on Youtube?
3. 
Q10:
1. Who does Ibrahim Chaibou award?
2. What country gets an award from Ibrahim Chaibou?
3. 
Q11:
1. Why does South Africa get an award?
2. What is South Africa permitted to do?
3. 
