Textbooks go from pawn to king. In five minutes that fails: the person remembers the first two pieces and loses the thread. The order has to be by what matters for the first game, not by the logic of a syllabus.
What they actually need
Not knowledge of the rules but permission not to look foolish. They are not afraid of losing; they are afraid of doing something absurd in front of everyone. Half the explanation should be aimed at that fear.
So the first sentence is not about pieces: «I'll show you everything in a minute, nothing bad can happen, and if you forget something your opponent will remind you - that is normal and allowed.»
That is about four minutes, leaving one for questions. Explain on the board, not in words: a knight's move shown with a hand is clearer than any description of it.
Half the success is in what you leave out. None of the following is needed in a first game, and in the explanation it would take the place of something that is.
One exception: touch-move is worth a sentence, gently - «at the board the custom is that if you pick a piece up, you move it». Otherwise the first disagreement with an opponent comes as an unpleasant surprise - the rest of the etiquette.
Clocks frighten beginners more than the pieces do, and they are usually explained worst. Three sentences are enough:
If the control has an increment, add one sentence: «a few seconds are added after every move, so you almost certainly won't run down to zero» - that reassures people - about time controls.
And ask the experienced opponent in round one not to rush them: one sentence from the host - «you have a first-timer, show them the clock» - achieves more than five minutes of explanation.
The most important minute of the five, and usually not spent at all. A beginner will almost certainly lose everything, and the only question is how they read that.
Organizationally this is the same question as retention: a beginner who loses five games and hears none of those sentences does not come back - why players stop coming.
Common to both: do not test them. «Go on, show me how the knight moves» in front of the room is an exam, and afterwards the person sits down tense.
The second pass is far more useful than the first: now the person knows what they do not understand. Two or three minutes between rounds are worth spending.
And point them onwards: tell them where to start at home. One link is enough - a plan for an adult beginner, basic checkmates.
Not the textbook order. First the goal of the game, then rook, bishop and queen as one block because their logic is shared, then the knight separately as the only genuinely confusing piece, then the pawn, then king and castling. And the clock - the item most often skipped.
En passant, castling conditions, stalemate, piece values, notation and above all openings. None of it is needed in a first game and all of it displaces something that is. The exception is touch-move: worth one gentle sentence, or the first disagreement comes as a surprise.
Three sentences: make your move then press your button with the same hand; while your side is running it is your turn to think; and if you forget to press, nothing breaks - you only lose your own time. The last one matters most, because it removes the fear of breaking something.
Say plainly that they will probably lose most games today and that is how everyone starts; give a goal unrelated to results, such as finishing every game and getting comfortable with the clock; and name the date of the next evening before the start.
A child needs fewer words and more showing, with understanding checked by «how does this one move?». An adult needs the principle rather than hand-holding, plus explicit permission to ask questions - adults are more embarrassed than children. Neither should be tested in front of the room.
No arbiter skills required. The app takes over the part that usually stops people from running tournaments at all: who plays whom in each round and who finishes first.
works for ten players and for fifty
for a small group that wants to play everyone
for those who do not need a bracket at all
The bot is constantly improved based on real tournaments. If you need a feature that isn't there yet, message the developers right inside the bot with the /support command. Many features appeared exactly because organizers asked for them, and useful ideas get added quickly.
For organizers - retention, announcements before round one, events for unrated players. Beginners - tactics.