FIDE-rated events
FIDE Swiss rules require the round count to be declared in advance, avoid repeat pairings, generally pair players with the same score, control color history, and use pairing rules that can be explained.
Tournament Director Guide
Swiss-system chess tournament guide for organizers
In a Swiss tournament, players keep playing after a loss. Each round pairs players with similar scores, while following rules for colors, repeat opponents, and byes.
Decide the rounds, sections, bye policy, and tiebreak order before registration opens
Check the rules for the federation rating your event
Swiss event flow
At a glance
Before round one
Publish sections, schedule, eligibility, fees, and bye rules before registration opens.
Between rounds
Pair players with similar scores, collect results, and keep standings visible.
After the final round
Apply tiebreaks, verify prizes or trophies, and preserve event records for the club.
This guide is educational. Tournament directors should still follow the official rules, federation guidance, and published event policy.
Tournament points are not rating points
Change the results in this four-round example. A win earns 1, a draw ½, and a loss 0.
2.5 / 4tournament score
Separateyour US Chess rating
A 2½/4 score does not mean a 250 rating. The rating calculation also considers opponents and earlier results. Trophy order may use the event’s announced tiebreaks.
See how tied scores are separatedAn example club tournament
A club might run a four-round Saturday Swiss with an Open section and an Under-1200 section, using 30 minutes per player plus a five-second delay.
The organizer must also publish who can enter each section, which ratings are used, whether requested byes are allowed, and the tiebreak order. These are example choices; check the requirements for your rated event.
Rulebook Reality
Swiss rules vary by event
Real tournaments depend on the rule set, federation, pairing system, and published event policy. FIDE-rated, US Chess-rated, scholastic, online, and local club events can use similar Swiss ideas while still handling pairings, byes, and tiebreaks differently.
US Chess events
US Chess events should make the pairing method, ratings used, tiebreaks, and bye rules clear in event publicity so players know how standings will be produced.
Byes and unplayed rounds
Requested byes, pairing-allocated byes, forfeits, withdrawals, and late arrivals can change both standings and tiebreak calculations. Publish the policy before round one.
Pairing software settings
Software is only as reliable as the event setup. Sections, ratings, late entries, byes, team restrictions, and tiebreak order all need to match the announced rules.
Planning Checklist
Details to decide before registration opens
Publishing these decisions early reduces round-one confusion and gives families a better registration experience.
Rating authority and whether each section is USCF-rated, FIDE-rated, dual-rated, or unrated.
Section eligibility by rating, grade, age, title, school, or invitation status.
Round count, time control, delay or increment, venue schedule, and expected finish time.
Entry fee, late fee, refund policy, capacity limits, and payment method.
Bye policy, forfeit policy, withdrawal handling, and late-arrival rules.
Tiebreak order for trophies, prizes, team awards, or final published standings.
How results will be submitted, verified, displayed, and corrected during the event.
Who can answer parent, player, staff, venue, and federation questions on event day.
Tiebreak Terminology
Publish the exact names your players will see
A lot of event-day confusion comes from using similar tiebreak names loosely. The same family of opponent-score tiebreaks can appear under different labels depending on whether the event is using FIDE wording, US Chess wording, or a pairing program's UI.
Buchholz and Solkoff
Buchholz adds up every opponent's final score. US Chess calls this Solkoff when no scores are dropped ('no cut'), before any event-specific adjustments for unplayed games.
Buchholz Cut 1
Cut 1 removes the lowest opponent score before summing the rest, reducing the impact of one opponent who scored poorly.
Median Buchholz vs Modified Median
Median Buchholz drops high and low values. US Chess Modified Median changes what is dropped based on whether the tied player had a plus, even, or minus score.
Cumulative systems
Cumulative adds a player's running score after each round. Opponents' Cumulative adds the cumulative scores of the player's opponents.
Direct encounter and playoffs
For a two-player tie, their head-to-head result may separate them. Ties involving more players need the event’s full direct-encounter rules. Publish any playoff policy in advance.
Sonneborn-Berger
Sonneborn-Berger weights each opponent's final score by the points scored against that opponent, so wins against high-scoring opponents count more. It is most common in round-robin events; in Swiss events Buchholz/Solkoff are the usual opponent-strength tiebreaks.
Official References
What to check before a rated event
Use this guide for planning and communication, then verify the final rule details against the current governing documents for the event.
Current basic Swiss rules, including round count, repeat-pairing, score-group, bye, color, and transparency requirements.
Current FIDE tie-break descriptions, modifiers such as Cut 1 and Median, and unplayed-round handling.
US Chess TD education, rules resources, SwissSys materials, and FIDE-rated event administration links.
Useful links
Planning a real event? Create a tournament on Chess67 or review the tournament software.