
thumb|Karl Rappan's verrou, a predecessor to the catenaccio
thumb|Karl Rappan's verrou, a predecessor to the catenaccio
Catenaccio () or The Chain is a tactical system in football with a strong emphasis on defence. In Italian, catenaccio means "door-bolt", which implies a highly organised and effective backline defence focused on nullifying opponents' attacks and preventing goal-scoring opportunities.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).