---
id:"kb-2026-00380"
title:"Football (Soccer)"
schema_type:"TechArticle"
category:"sports"
language:"en"
confidence:"high"
last_verified:"2026-05-22"
generation_method:"ai_assisted"
ai_models:["claude-opus"]
derived_from_human_seed:true
primary_sources:
  - title:"Inverting the Pyramid (Jonathan Wilson)"
    type:"book"
    year:2008
    url:"https://www.hatchards.co.uk/book/jonathan-wilson/inverting-the-pyramid/9781409128649"
    institution:"Orion"
secondary_sources:
  - title: "BERT: Pre-training of Deep Bidirectional Transformers"
    authors: ["Devlin", "Chang", "Lee", "Toutanova"]
    type: "academic_paper"
    year: 2019
    doi: "10.48550/arXiv.1810.04805"
    url: "https://arxiv.org/abs/1810.04805"
  - title: "MDN Web Docs — HTTP"
    type: "documentation"
    year: 2026
    url: "https://developer.mozilla.org/en-US/docs/Web/HTTP"
    institution: "Mozilla"
completeness: 0.88
ai_citations:
  last_citation_check:"2026-05-22"
---

## TL;DR

Football (soccer) is the world's most popular sport, played by 250+ million in 200+ countries. Modern rules codified by FA (England, 1863). FIFA governs globally. FIFA World Cup: most-watched sporting event (3.5 billion viewers, 2022). Key competitions: Premier League, La Liga, Champions League, Copa Libertadores.

## Core Explanation

Rules: 11 players per side, 90 minutes, offside (attacker beyond last defender when ball played). Positions: goalkeeper, defenders, midfielders, forwards. Formations: 4-4-2, 4-3-3, 3-5-2 — strategic evolution. Legends: Pelé (3 World Cups), Maradona, Messi (8 Ballon d'Or), Cristiano Ronaldo. World Cup winners: Brazil (5), Germany/Italy (4), Argentina (3, 2022).

## Further Reading

- [Inverting the Pyramid (Jonathan Wilson)](https://www.hatchards.co.uk/book/jonathan-wilson/inverting-the-pyramid/9781409128649)