Offside, Explained Simply
Finally understand the offside rule.
The definitive interactive explainer for the most debated rule in football. Drag any player, see the line react instantly.
The rule in three parts
Three things decide every offside call.
01
Active Involvement
A player must be involved in active play by interfering with an opponent or gaining an advantage.
02
Relative Position
Any part of the head, body or feet is in the opponents' half (excluding the halfway line).
03
The Opponents
The player is nearer to the opponents' goal line than both the ball and the second-to-last opponent.
Complex Cases
Run the classic scenarios.
Striker leans off the last shoulder before the ball is played. Flag up.
Sportlament
Made to make football make sense. Built for coaches, analysts, and the truly curious.
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© 2026 Sportlament. Built for the love of the game.
Offside, Explained Simply
Finally understand the offside rule.
The definitive interactive explainer for the most debated rule in football. Drag any player, see the line react instantly.
The rule in three parts
Three things decide every offside call.
01
Active Involvement
A player must be involved in active play by interfering with an opponent or gaining an advantage.
02
Relative Position
Any part of the head, body or feet is in the opponents' half (excluding the halfway line).
03
The Opponents
The player is nearer to the opponents' goal line than both the ball and the second-to-last opponent.
Complex Cases
Run the classic scenarios.
Striker leans off the last shoulder before the ball is played. Flag up.
Sportlament
Made to make football make sense. Built for coaches, analysts, and the truly curious.
Product
Try it
Rules
Scenarios
Company
About
Methodology
Contact
Legal
Privacy
Terms
Terms of Use
© 2026 Sportlament. Built for the love of the game.