Rugby

Both codes descend from the same nineteenth-century game and share a shape: a ball carried and passed, a try scored by grounding it beyond the line, and tackling used to stop the carrier. The split was organisational before it was technical — a dispute over payments to players — but the two games then diverged for more than a century, so the differences are now structural.

The consequence for a reader is practical: a competition belongs to one code, a result tells you nothing about the other, and a phrase like "the national team" means a different squad depending on which sport you are watching.

The differences that matter

That last row explains a great deal. Union's calendar is built around international windows and a world cup that stops domestic leagues; league's calendar is built around club competitions, with international fixtures accommodated around them.

How the games are structured

Rugby union

The ball is contested continuously. When a tackled player goes to ground, a ruck forms as players compete for possession with their feet; when the carrier is held up, a maul may form. A scrum restarts play after a minor infringement, and a lineout restarts play after the ball goes into touch. Because possession can change without a score, territory and kicking for position matter as much as attack.

Competitions layer in the same way soccer's do: an annual international championship between European nations, a corresponding southern-hemisphere championship, a world cup, and domestic leagues that feed a continental club competition. Domestic league seasons also include an end-of-season knockout, so a club can finish mid-table domestically and still win a trophy.

Rugby league

Possession is largely retained through a set of tackles. The tackled player plays the ball backwards with the foot and the same team continues, until the set is used up or the ball is lost, whereupon possession passes. That structure makes territory gained per set — and the kicking game that follows the last tackle — the central tactical battleground.

Competitions run as domestic leagues with a post-season series to decide the champion, alongside knockout cups. A three-match interstate series in one country has become one of the sport's most-watched events, which is unusual: it is a representative series rather than a club or international competition.

Scoring and discipline

Both codes can end in a draw, and in some competitions a draw in a knockout match is resolved by extra time or a further period. Both use a sin bin — a temporary suspension, conventionally ten minutes — for a mid-range offence, and a sending-off for a serious one.

Both also use a video review official to examine try-scoring and foul play, and both have revised how reviews are conducted in recent years, including how much of the decision is referred back to the referee on the field. That process is worth checking rather than assuming, because the protocols have changed more than once.

Key terms