At a normal event the field is fixed at the start. At a family day it changes every fifteen minutes, which breaks the two things a tournament depends on.
So the goal changes: not to determine a winner, but to make sure that anybody who stops at the table gets a game within a minute and leaves pleased.
The strongest arrangement combines them: open tables all day, one simul at an announced time, and a king-of-the-board table in the corner for the competitive ones.
What not to attempt: a Swiss with pairings and a final table. It will be abandoned by the third round, and the person maintaining it will spend the afternoon chasing people who have gone to lunch - where a real tournament format belongs.
What to bring and how to pack it - transporting a set.
Half the games will be a parent against a child, and an unbalanced game is unpleasant for both. Four ways to fix it, in order of how well they work:
Whoever is running the table should offer the handicap rather than waiting to be asked: adults rarely suggest playing without a queen against their own child, and children never do - similar levelling in mixed fields.
Nothing here is decided by standings, so prizes work differently from a tournament.
And the one thing worth setting up before the day: a way for people to find you afterwards. A QR code on the table leading to your club's chat or schedule converts a pleasant afternoon into actual players - which is the only lasting result a family day can produce - regular club events.
Not a tournament. Open tables where anybody sits down and plays whoever is free, king of the board with a capped winning run, and a simul at an announced time. The best arrangement combines all three, because the field changes every fifteen minutes.
Rounds need everybody to start and finish together, and at a family day half the field will have wandered off by round three. Standings also mean little when one person played twice and another nine times, and registration forms turn people away before they sit down.
Six to ten boards, so somebody arriving finds a free one, and at least two people running it: one to greet and pair players, one to explain rules and reset boards. Alone you will be resetting while people stand waiting.
Material odds work best - the adult plays without a queen or a rook, and children love the idea. Time odds work too, playing as a parent-and-child pair against another pair removes the problem entirely, and otherwise match by level rather than age.
Small things handed out constantly rather than one award at the end: sweets, badges, stickers for a win, and a printed certificate for anybody who plays. Keep one real prize for anybody who draws or beats the simul giver.
The Vibe Chess app opens from a link and needs no installation. Setting up a tournament takes a minute: pick the system, set the date, the venue and the time control - the app handles the rest.
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.
Formats - corporate events, chess party, outdoor events, a blindfold display as a show.