This beautiful game would be very ugly if offside didn't exist. At the World Cup, you'll see it often.

Even though it's fairly straightforward, soccer's offside rule can be confusing for casual fans. And even controversial at ...

The law governing its modern application has 45 clauses and runs to more than 1,000 words. A former Premier League referee ...

The flag is up! We explain what that means and why one of soccer's most important rules is also one of the toughest to see ...

This World Cup has prompted some questions we simply can't answer for you. Can anyone stop Messi? Does Merlin the duck like ...

As the World Cup approaches, one of soccer’s most elusive phrases will pop up again and again on televisions across the country. You’ve heard it, you may claim to understand it, but what exactly is ...