12

The information is hidden away in Standards of Chess Equipment and tournament venue for FIDE Tournaments section 13.4. 13.4. Buchholz System 13.4.1. The Buchholz System is the sum of the scores of each of the opponents of a player. 13.4.2. The Median Buchholz is the Buchholz reduced by the highest and the lowest scores of the opponents. 13.4.3. The ...


8

The current algorithms are deterministic. I have no idea why you would want a non-deterministic algorithm. The advantage of the deterministic ones we currently use is that they can be easily done by hand (and were done by hand until quite recently), so if a TD changes them manually that can be detected. Gender of the players is not an input to the algorithm ...


6

FIDE publish a list of such programs here. Currently there are 8 programs on the list varying in price from completely free (STOP), free on Linux (Vega), partially free (ChessManager) to 150 euros (Swiss Manager). Program - Author Vega - Luigi Forlano (ITA) SwissSys - Thad Suits (USA) SwissMaster - Royal Dutch Chess Federation (NED) Swiss-Manager - Heinz ...


6

I participated in a local, FIDE-rated tournament. In its first round, the chief arbiter paired the players 4 times This has happened to me too, although not as many as 3 repairings that I am aware. As an arbiter I've also done repairing in the first round although only ever in small local events. I would try very, very hard indeed to avoid doing this in a ...


6

is there any good and free software available for setting up swiss tournaments? All of those I've tried have very few options and little functionality available. Vega is a swiss pairing program which has been approved by FIDE. It is free if you install it on Linux and if you install it on Windows it is free up to 30 players in the tournament. It is a ...


6

You could try this free service: https://swisssystem.org/ It’s simple and easy to use. It works fine on mobile devices. The maximum player count is 200.


5

SWIPS is also online tool for managing tournaments. It includes much more than just a swiss system and round robin, but you can use it solely for that purpose if you want. Right now its free, available languages are English and Slovak.


4

An offline alternative is Vegachess, which it is also homologated by FIDE. AFAIK Vegachess just uses javafo as its pairing engine. Linux version of vegachess is free to use and Windows version not very expensive.


4

My club uses Swiss Manager. It is very good but not cheap. 150 euros for the full version, 75 euros for the light. It is perhaps worth looking at what it does to get ideas if you are thinking of writing your own. One I downloaded some time ago but still haven't got round to playing (so I can't give any recommendation) is OSwiss which is a project on ...


4

It says the exact opposite. C.04.2 A It is not allowed to alter the correct pairings in favour of any player. So no, you can't. Where it can be shown that modifications of the original pairings were made to help a player achieve a norm or a direct title, a report may be submitted to the QC to initiate disciplinary measures through the Ethics ...


4

There are a couple of records of this sort in the relevant Wikipedia page. To quote: Thirteen players tied for first with 5–1 scores at the National Open held on March 17–19, 2000 in Las Vegas: grandmasters Jaan Ehlvest, Alexander Goldin, Alexander Baburin, Pavel Blatny, Eduard Gufeld, Yuri Shulman, Alex Yermolinsky, Gregory Kaidanov, Dmitry Gurevich, ...


3

Assume a 9 round Swiss tournament with 2^9 players, White always wins. Will the pairing computer (definitely not super quantum) go berserk? Thank you for clarifying the difference between NA (National Arbiter) exam you took in Germany and the full FA (FIDE Arbiter) exam. This kind of stuff is covered in the FA exam. The program won't go berserk. Here is the ...


3

As for tournaments with swiss system, all computer programs are paid. That's why I decided to create a freeware program (REALLY free). Name of my program is VinczeSwiss. The VinczeSwiss program is available for download at: https://www.zzsvysocina.cz/download/vinswiss.htm In the package https://www.zzsvysocina.cz/download/vinswiss.zip, there is ...


3

One sure-fire way is for you to buy your own copy of Swiss Manager, the pairing software used in this particular case, and reproduce the tournament and then do the next round pairing once all the results are in. The light version of Swiss Manager, which you could use since there are fewer than 60 players, costs 75 euros. Alternatively you could try and do ...


3

E2-E4 online pairing program is now available for everyone. Previously it was used organizers for pairing and to show results in a real time in Russia - chessresults.ru project. This program can be used on any kind of devices, but especially it designed for mobile devices. Arbiters/trainers with tablets can manage chess tournament much more effectively and ...


3

There is a tradeoff between making the pairings that "should" be made according to the strict pairing rules, and attempting to prevent collusion. Imagine this scenario: Russia 1: 8.5 Russia 2: 8 India: 8 Peru: 7.5 Which is more unfair: to have Russia 1 play Russia 2 and have a possible prearranged result, or to prevent Russia 1 and Russia 2 from ...


3

Surely we can create opt out for gender pairings which occur consecutively? Yes, we could. We can make whatever rules we like, after all. But I don't think we should. Such a rule would have to come at the expense of some other pairing rule. We currently have rules that players cannot play each other twice, that players with equal scores should play ...


3

According to the website for the engine it was written by international arbiter Roberto Ricco: The author JaVaFo is authored and intellectually owned by Roberto Ricca, former programmer, International Arbiter and current Secretary of the FIDE Commission “Systems of Pairings and Programs” (SPPC), formerly known as “Swiss Pairings Programs”. The name The name ...


2

Is there an option in the pairing program to set this? Of course. Different approved Swiss pairing programs will do this is different ways. You should check out the User Manuals for the different programs to see how this is done. For instance, in the Vega program go to the File menu, Round Manager, Avoid Pairs option and you can specify groups of players ...


2

If you are looking for an easy-to-use, FIDE-approved online platform, take a look at ChessManager.


2

Is this situation logically possible? Certainly. This is one of the known problems with using Swiss pairing when the number of rounds is close to the number of players. It is called "jamming". There is no simple software solution. For a serious tournament you would not use Swiss pairing when (Number of players) < (number of rounds + 2). Remember a ...


2

In the first round, it should go to the player with the lowest initial ranking. After that, it depends, but it would ordinarily go to a low ranked player in the lowest score group. According to rule A.2: For pairings purposes only, the players are ranked in order of, respectively (a) score (b) pairing numbers assigned to the players accordingly to ...


2

Note:   Independently from the route followed, the assignment of the pairing-allocated bye (see C.2) is part of the pairing of the last bracket. https://www.fide.com/component/handbook/?id=170&view=article In simple terms, this means that the bye normally goes to one of the players currently tied for last place, but there may be complications if ...


2

Swiss system has nothing to do with time controls. It is a tournament pairing system based on the principle that in each round players with so far similar results are paired together, and that each player has approximately as many games with white and black. Details can be found in wikipedia.


2

What are those rules? The rules are defined in the FIDE document C.04.1 Basic rules for Swiss Systems. C.04.1 Basic rules for Swiss Systems The following rules are valid for each Swiss system unless explicitly stated otherwise. a The number of rounds to be played is declared beforehand. b Two players shall not play against each other more than once. c ...


1

According to definition A.2 the player rank changes dynamically, round after round No, I don't think you fully understand what is going on. During the pairing process for a particular round in a given score group the ranking within a score group is fixed according to what the original ranking before the first round. A.2 Order For pairings purposes only, ...


1

There's a Python library called PyPair, that allows to easily generate the pairings, a short example: Players = { 1:"Tim", 2:"Jeff", 3:"Kristi", 4:"Jacob", 5:"Doug", 6:"Karen", 7:"David"} to = Tournament() for player in Players: to.addPlayer( player, Players[player] ) pairings1 = ...


1

Jeremy Bierema has written a Swiss pairing program and put it on Github. You could look at the code there which is in C++. At any stage in the tournament you have to have a list of forbidden pairings. The first, obvious entries are pairings that have occurred previously. The second, banning 3 whites in a row, is ww v ww since one of them will have to be ...


1

You can use Schachturnierorganisationsprogramm for Swiss-Tournaments. Since FIDE-Congress Abu Dhabi 2020 Schachturnierorganisationsprogramm is endorsed by the SPP-Commission. My program is open-source and free to use. Available languages are: German, English, French, Spanish, Bavarian, Italian and Portuguese. Download here.


1

The difference is in the scale of the tournament / match you need to handle. If you plan a tournament with maximum of 60 participants and 11 rounds (or a team championship up to 6 teams), the light version is enough. If you plan to grow big, then choose the full version. You can read this on the official site (last paragraph).


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