Rules
How the Advantage Rule Works in Football
Understand the football advantage rule, read the referee’s signal and see when play continues or returns to the…
All the explainers
All articles
Browse explanations of the rules, tactics, formats, equipment and match patterns that help make sport easier to follow.
Tactics
High Press or Mid-Block: Two Ways to Shape Defensive Space
High press or mid-block? See how starting positions, pressing triggers and space behind the defence shape a team’s…
Formats
Why the Modern Olympic Pentathlon Changed Its Events
Why the modern Olympic pentathlon changed its events, and how its current mix reshapes the contest’s demands…
Equipment
Golf Club Face Grooves and What They Mean for Your Shots
Golf club face grooves help manage contact through grass and moisture. Learn what to compare on a wedge and how to…
Match Reading
Your First Volleyball Match: Follow the Rotation
Follow volleyball rotation at your first match: spot the serving change, track each player’s court position and read…
Our point of view
Understanding changes what you see
Knowing a rule or role gives each moment more context. Open Sports Bulletin makes those details clear without assuming you already speak the language of sport.