# Offside · Football Level 2: Elementary

Football · Level 2: Elementary · Insporta Book (https://book.insporta.app/football/level-2/offside/)

Offside in Football (Level 2: Elementary) on Insporta: 100 sourced facts behind 10 tests. Covers: offside definitions; numbers and key thresholds; and more.

Offside position vs offside offence; the second-last opponent rule; active vs passive offside; exemptions (own half, throw-in, goal kick, corner kick); deliberate play vs deflection; goalkeeper throw 2025/26 clarification.

## Test 1: Offside definitions

- A player is in offside position if any part of their body that can play the ball is closer to the opponents' goal line than both the ball AND the second-last opponent.
- Being in an offside position is not an offence in itself. The offence (offside) requires the player to actively engage with play.
- Being in an offside position is not an offence by itself — it only becomes one once the player becomes 'active' in the play.
- In typical play, the goalkeeper is the last opponent and the last outfield defender is the second-last. So practically, an attacker is offside if past the last outfield defender (with the goalkeeper on the goal line).
- A defender's deliberate play — real control, not just a touch — resets offside for any attacker who was previously in an offside position.
- A deliberate save is when a player (usually the goalkeeper) deliberately stops a ball going into the goal. A rebound from a save still triggers offside if collected by an offside-position attacker.
- Interfering with an opponent includes clearly obstructing the goalkeeper's vision, challenging an opponent for the ball, or making an obvious action which clearly impacts an opponent's ability to play.
- Gaining an advantage means playing a ball that has rebounded — from the goal-frame, an opponent (after deliberate save or any deflection following a deliberate save), or another offside player.
- For offside, only body parts that can legally play the ball are considered. Arms above the bottom of the armpit are excluded — same boundary as for handball.
- Being exactly level with the second-last opponent does not satisfy 'nearer than' — so it is not an offside position.

## Test 2: Numbers and key thresholds

- At least two opponents must be between the attacker and the goal line — typically the goalkeeper and one outfield defender. The current 'two opponents' rule has been in place since 1925.
- Offside is not called when the ball is received directly from a throw-in, a goal kick, or a corner kick.
- Offside can only be called when the player is in the opponents' half of the pitch. A player in their own half cannot be offside.
- For a goalkeeper's throw, the 2025/26 Laws use the last point of contact — when the ball leaves their hand — rather than the usual first point of contact.
- An offside offence results in an INDIRECT free kick to the defending team, taken from where the offside-positioned player was when their teammate played the ball.
- The offside rule moved from no restriction (1863), to a 3-opponent requirement (1866), to the modern 2-opponent version (1925).
- The 'three opponents' rule applied from 1866 to 1925, when it was reduced to two. Goals per game roughly doubled in the seasons after.
- For offside, the same body-part boundary as for handball applies: only body parts below the bottom of the armpit count.
- Practically, the goalkeeper is on or near the goal line and the last outfield defender plays the role of second-last opponent.
- Offside is judged at the instant the ball is played by a teammate, not at the moment the attacker later touches it.

## Test 3: Who decides what

- Assistant referees patrol the touchlines and are positioned to judge the second-last opponent's line. They flag for offside; the referee makes the final decision.
- VAR can only review offside in the build-up to a goal, penalty, or direct red card — not every offside in the match.
- The referee judges deliberate play, considering criteria like whether the defender had time, control, and chose to play the ball. VAR may advise via standard protocol.
- The offside line is set by the second-last opponent — usually the last outfield defender, not the goalkeeper.
- The referee judges whether an offside-position player has gained advantage from a rebound — from the goal-frame, an opponent, or a deliberate save.
- The assistant referee signals offside by raising the flag perpendicular. The referee then blows the whistle to stop play and award the indirect free kick.
- If the assistant flags but the referee judges advantage (e.g., defending team has the ball clear), the referee can wave play on.
- The referee judges whether interference occurred — based on the offside player's actions, vision-blocking, or actions that affect an opponent.
- Assistant referees position themselves to be level with the second-last opponent, giving them the best line of sight for offside.
- Semi-automated offside technology tracks players and the ball, calculates the line, and is checked by VAR before the referee is told.

## Test 4: Allowed and forbidden — when offside applies

- Offside is not applied when a player receives the ball directly from a throw-in. This dates back to the original Law 11.
- Receiving the ball directly from a goal kick is exempt from offside.
- A player cannot be offside directly from a corner kick. The exemption covers the initial pass; subsequent play follows normal offside rules.
- Free kicks (direct or indirect) are subject to offside. Players must be onside when the kick is taken.
- A player in their own half is automatically onside, regardless of how many opponents are between them and the goal line.
- Level with the second-last opponent counts as onside — the attacker must be nearer to the goal line, not just level.
- Running back onside afterwards does not undo an offside position judged at the moment the ball was played.
- A defender's deliberate play, even a clearance, resets an attacker's offside position.
- A deliberate save does NOT count as deliberate play. The offside player remains offside if they play the rebounded ball.
- Even if the player is in possession or dribbling, the moment a teammate plays the ball is the only one that matters for offside judgement.

## Test 5: Consequences and edge sanctions

- Offside is punished by an indirect free kick to the defending team, taken from where the offside-positioned player engaged in play.
- The offside restart is taken from where the offside player was when their teammate played the ball, not from where the ball was played.
- Offside is purely a positional offence — no card is issued. Only the indirect free kick is awarded.
- If an offside-positioned player interferes with an opponent (e.g., obstructs goalkeeper's vision), the goal is disallowed regardless of who scored.
- An offside position alone is not an offence — if the player is fouled before becoming active, the foul is punished normally.
- If the defending team already has the ball, advantage is applied — no need to stop play. The offside flag is waved off.
- An offside found anywhere in the build-up to a goal disallows the goal, restarting with an indirect free kick to the defending team.
- A deflection is not 'deliberate play'. The offside-positioned attacker who plays the deflected ball is still offside.
- VAR can review back through the attacking phase of play if an offside led to a goal — even if play continued for some time.
- From 2025/26, IFAB clarified: on goalkeeper throws, offside is judged from the LAST point of contact (i.e., when the ball leaves the hand) — for clearer/consistent reference.

## Test 6: History of the offside rule

- The 1863 FA rules treated football like rugby — any forward pass to a player ahead of the kicker was offside. This effectively prevented all forward passing.
- The offside rule's landmarks run: no rule (1863), 3 opponents (1866), 2 opponents (1925), and automated tracking (2022).
- The rule requiring only 2 opponents (rather than 3) between the attacker and the goal line was introduced in 1925.
- IFAB clarified 'active offside' interpretations in 2005, focusing on engaging in play (interference, gaining advantage) rather than mere position.
- Offside interpretation was refined step by step: active offside (2005), body-position criteria (2019), deliberate play vs deflection (2023), and goalkeeper throws (2025/26).
- For the 2025/26 season, IFAB added that offside on goalkeeper throws is judged from the LAST point of contact, for consistency.
- In England's 1925-26 season, goals per game went from about 2.6 to over 3.6 — a near-doubling, reflecting how restrictive the old offside had been.
- The FA introduced the three-opponent rule in 1866. FIFA and UEFA did not exist yet — these are governing bodies founded later.
- Semi-automated offside technology debuted at the 2022 World Cup in Qatar, providing pixel-accurate offside lines.
- The 'daylight rule' interpretation, requiring visible space between attacker and defender, was effectively replaced as IFAB clarified that level = onside in modern guidance.

## Test 7: Exceptions and edge cases

- A player off the pitch is treated as being on the goal line for offside purposes, so they can still be offside.
- The referee counts as part of the pitch — a deflection off them does not reset or cancel an offside position from the initial pass.
- IFAB confirms that deliberate handball by a defender counts as deliberate play, resetting the offside chain.
- A simple deflection (not deliberate play with control) does not reset offside. The offside-positioned attacker is still penalised.
- A save (deliberate or otherwise) does not reset offside — the rebound from a save is still subject to the original offside.
- Past the goalkeeper but level with the last outfield defender = level with second-last opponent overall = onside.
- A rebound off the goal frame is not deliberate play by a defender, so an offside-position attacker who benefits from it is still offside.
- Whether a lunging defender's touch cancels offside depends entirely on whether they had genuine control — a mere deflection does not reset it.
- A save followed by the ball hitting the offside-positioned player meets 'gaining advantage' criteria — offside is called.
- A player playing the ball themselves cannot be 'offside' from their own pass — offside is judged from the moment a teammate plays the ball, with the attacker as receiver.

## Test 8: Comparisons

- Rugby offside requires being behind the ball carrier or last team-mate. Football allows forward passes provided receivers are onside (level with second-last opponent).
- Ice hockey: the puck must precede attackers into the attacking zone (blue line). Football: judged at the moment of the pass relative to second-last opponent.
- Field hockey abolished offside in 1996 (FIH rule change). Football retains offside — though some grassroots variants relax it.
- Unlike other plays, judged from the first point of contact, a goalkeeper's throw is judged from the last point of contact — when the ball leaves their hand.
- Control with time to play the ball resets offside (deliberate play); a bare deflection with no control does not.
- Both are forms of 'becoming active offside' — but they're different categories. Interfering involves an opponent; gaining advantage involves rebounds from goal-frame, opponent, or save.
- The 1925 change is widely seen as the most impactful single rule change for goalscoring in football history.
- Offside applies on free kicks but is one of the three restarts (with throw-ins and goal kicks) exempt from offside on corner kicks.
- Both Law 11 (offside) and Law 12 (handball) use the same boundary: the bottom of the armpit. Body parts above this line don't count for either.
- Football's Law 11 specifically exempts throw-ins. Futsal uses kick-ins (no throws); these are similarly treated as restart exemptions.

## Test 9: Mini scenarios

- An attacker ahead of the second-last defender when the ball is played, who then scores, is offside and the goal is disallowed.
- Being level with the second-last opponent is onside. Goal stands.
- Rebound from the goal-frame is gaining advantage. Goal disallowed; indirect free kick to defending team.
- Position is judged ONLY at the moment the ball is played. Earlier positions don't matter.
- A mishit clearance is still deliberate play if the defender had genuine control — it resets the attacker's offside position.
- Corner kicks are exempt from offside. The attacker may stand anywhere and play the ball directly.
- Blocking the goalkeeper's vision counts as interfering with an opponent — even without contact. Goal disallowed.
- Players in their own half are automatically onside, regardless of opponent positioning.
- Being in offside position is not an offence — only engaging in play. If the offside-positioned player didn't interfere or play the ball, the teammate's goal counts.
- Under 2025/26 Laws, the striker's position at the moment the goalkeeper released the throw is what's judged, regardless of where they are when the ball arrives.

## Test 10: Mixed review

- Offside is NOT just position — the player must become 'active' by playing the ball, interfering, or gaining advantage.
- Offside results in an indirect free kick to the defending team, taken from where the offside-positioned player was when the ball was played.
- The three exempt restarts are throw-in, goal kick, and corner kick.
- In 1925, IFAB reduced the requirement from three opponents to two — the rule that has applied ever since.
- Position is fixed at the moment the teammate plays the ball — not later.
- Level with the second-last opponent is onside. Ties favour the attacker.
- Only body parts that can legally play the ball matter for offside — arms above the bottom of the armpit are excluded.
- Offside can only be called when the player is in the opponents' half of the pitch.
- A deliberate save does NOT count as deliberate play — offside still applies to a player who plays the rebound.
- Semi-automated offside technology (using player-tracking cameras) was first used at the 2022 World Cup in Qatar.

Sources: 

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