Rugby Union Explained: A Beginner Guide to Laws, Positions and Points

Rugby looks like chaos for about twenty minutes and then, quite suddenly, it does not. Underneath the pile of bodies there is a small set of rules doing almost all the work, and once you know them the whole game becomes legible. This guide covers everything a new fan or a new player needs: the pitch, the fifteen positions, how points are scored, what actually happens when someone gets tackled, and why the referee keeps pointing at things.

The one rule that explains the rest

You cannot pass the ball forward. Ever. Every pass must travel sideways or backwards, and if it goes forward off a player's hands the referee stops play for a knock-on.

Sit with that for a second, because almost everything strange about rugby follows from it. If you cannot pass forward, then the only ways to move up the field are to run with the ball, or to kick it. And because you have to run into the defence rather than around it, contact is not an unfortunate side effect of the sport — it is the central mechanism.

It also explains the shape of the game. Attackers must stay behind the ball carrier, which is why a rugby backline forms a diagonal line running away from the ball rather than spreading level across the pitch.

The pitch

A rugby pitch is up to 100 metres between the two try lines, with an in-goal area behind each. The lines painted across it are not decoration — each one changes what a team is allowed to do.

The 22-metre line matters most. Inside your own 22 you may kick the ball directly into touch and the lineout is taken from where it went out, gaining you ground. Outside the 22, a direct kick to touch means the lineout comes back to where you kicked from, so you gain nothing. That one rule shapes where teams choose to play.

The dashed 10-metre lines either side of halfway govern kick-offs: the kick must travel at least ten metres. And the in-goal area behind each try line is where tries are scored — the try line itself counts as part of it.

The fifteen positions

Rugby splits into two units that do genuinely different jobs. Shirts 1 to 8 are the forwards, collectively the pack: they win the ball in the scrum and lineout, and do the heavy close-quarters work. Shirts 9 to 15 are the backs: once the ball is won, they are the ones with space to run into.

The numbers are the positions, worldwide. A 7 in Cardiff does the same job as a 7 in Christchurch. All fifteen positions are broken down here, including a flowchart for which one suits you if you are thinking about playing.

How points are scored

There are four ways to score, and they are worth different amounts on purpose — the system is designed to reward carrying the ball over kicking it.

The detail people miss is that the conversion is taken in line with where the try was grounded. Score under the posts and it is a formality; score in the corner and it becomes a difficult angled kick. That is why you will see a player who could dive in at the corner instead run infield first. Scoring is covered in full here.

What happens when someone is tackled

This is the part that makes no sense from the outside and is the single most useful thing to learn.

A tackle is not a stoppage. The moment a carrier is brought to ground, a sequence begins and it has strict rules. If you understand this sequence, roughly seventy percent of the referee's whistles will suddenly make sense.

The exception is the reason the openside flanker exists. Before a ruck forms, a defender who is on their feet and supporting their own weight may reach in and take the ball — the jackal. Once a ruck has formed, that becomes illegal instantly. Half the penalties you see are a referee ruling on whether a ruck had formed yet.

The breakdown is explained in full here, including the difference between a ruck and a maul, which trips up almost everyone.

The set pieces

When play stops, it restarts with one of two set pieces, and both are contests rather than free restarts.

The scrum

Eight players from each side bind together and push against the other eight. The ball is fed into the tunnel between them and the hooker tries to hook it back. Scrums restart play after a knock-on or a forward pass. They are extremely technical and genuinely dangerous when done wrong, which is why the laws require trained front-row players. The scrum, decoded goes through it properly.

The lineout

When the ball goes out of play over the touchline, both packs form two lines and the team throwing in tries to win it — usually by lifting a jumper into the air. The throwing team calls a coded number to tell their own players where the ball is going. That is why you hear shouting. Lineout basics are here.

Eighty minutes, explained

The shape of a match is more predictable than it looks.

The clock runs continuously and only stops for injuries and certain reviews. When the clock reaches 80 the game does not end immediately — play continues until the ball next goes dead. That is why you see desperate phase play after time is up.

Cards, and why rugby is stricter than it looks

A yellow card sends a player off for ten minutes; their team plays with fourteen. A red card removes them for the rest of the match. Rugby has become notably strict about contact with the head, and a tackle that would have been ordinary fifteen years ago is now frequently a card.

The other thing that surprises newcomers is the treatment of the referee. Only the captain speaks to them, players call them sir or by name, and dissent is punished immediately by advancing the penalty ten metres. It is one of the sport's better habits.

You do not need to know the laws to enjoy rugby. You need to know one: nobody can pass it forward. Everything else you can pick up by watching.

What to actually watch

If this is your first match, ignore the ball for a moment and watch these instead.

1. The space, not the ball. Look at where the defence is thin. Rugby is a game about creating and finding gaps, and you can see the gap open a second before the ball gets there.
2. The scrum-half. They touch the ball more than anyone. Watching the 9 tells you what a team is trying to do.
3. Who wins the collision. Not who tackles, but who ends up going forwards. That is the underlying score of the match.
4. The referee's arms. They are narrating everything. The twenty signals worth learning will get you most of the way.
5. The bench at 55 minutes. Watch what the replacements change. It is usually the whole story of the last quarter.

If you would rather have a proper first-timer walkthrough, how to watch rugby and actually enjoy it is written for exactly that, and the hundred terms glossary covers the vocabulary.