the.com/onside
the only rule in soccer that turns a stadium of adults into simultaneous geometry professors.
means a player is onside if, when the ball is played to them, at least two opponents (usually the goalkeeper and one defender) are level with or closer to their own goal line than they are.
from borrowed from rugby football's offside concept in the 1800s, when english public schools codified rules against players lurking near the opponent's goal for a cheap pass — soccer kept the spirit, sharpened the geometry.
var linessemi-automated offside uses 29 tracking cameras per stadium
toenail rulea shoulder or toenail ahead still counts as offside
not a fouloffside is only called if the player is involved in play
for instance
messi 2022 final assist — lionel messi's pass to di maria ruled onside by millimeters