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Questions tagged [swiss-pairing]

For questions about the Swiss Pairing method which is used in some (open) tournaments to determine who plays against whom.

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How can I know if the chief arbiter has "cheated" in the pairings and possibly report it?

Few years ago, I participated in a local, FIDE-rated tournament. In its first round, the chief arbiter paired the players 4 times (yes, I saw the 4 different pairings and changed four opponents before I started the game!). This was only the start;…
double-beep
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How is Buchholz score calculated in a Swiss tournament?

I would like to know how the Buchholz tiebreak system works, and how it is calculated, taking into consideration other factors such as bye, no show (default win), etc.
Phemelo Khetho
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Looking for online Swiss pairing software

I would appreciate if somebody could recommend a good Swiss pairing program. I'd prefer online version with multi-language option and free version but cheap one is also good. I've found http://www.free-swiss.com/ but do you know other ones?
gabor.harsanyi
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What is the color of a forfeit?

Again, wonders of Swiss. Before the last round, I had bwbwbbwf. My opponent had bwbwbwbw. The f wasn't a colorless bye (I'd give up chess then :-) but a forfeit after pairings were out (due to sudden sickness of my R8 opponent). Is a forfeit…
Hauke Reddmann
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Is there a tournament system that pairs players based on ratings being similar?

Clearly games are more fun when the result can't be predicted in advance hence pairing players who have not recently played each other and have similar ratings has advantages. After a few games it should be possible to pair based on each player's…
Ian Ringrose
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Which pairing programs have been authorized by FIDE for use in FIDE rated tournaments?

There are lots of questions about pairing programs here, some of them mention being authorized by FIDE, but how can I check and know which programs are currently authorized?
Brian Towers
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Swiss-pairing algorithm

Is there a (simple) algorithm for setting up a swiss tournament? I've searched around a little, but can't find anything specific. Alternatively, is there any good and free software available for setting up swiss tournaments? All of those I've tried…
Mr. Eivind
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Swiss bye only half-point?

Scanning my old club zines, I tripped over a 1989 article where it says the (then :-) new FIDE rules gave a half point for a Swiss bye. Possibilities: a) The dude misunderstood the complicated rules. ("Pass bye" for 1/2 point - when a player can't…
Hauke Reddmann
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Can a non-rated tournament having all categories play in a single group and then the ranking decided based on overall performance?

Let's say there are 4 categories playing Chess: U11, U17, Ladies & Open. In India, I have witnessed 2 types of category based Swiss tournaments, which are non-rated. U11 players play each other; Similarly U17, Ladies & Open play only each other. No…
iammilind
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Overruling last round color check in Swiss

Spinoff from here FIDE Swiss pairing rules state that last round color check in Swiss may be overruled by the organizer. They don't state what overrules. Probably it is not in the whim of the organizer! The default might simply be "just throw the…
Hauke Reddmann
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How can I use JaVaFo in my pairing program?

JaVaFo is the official pairing engine for certifying implementations of the Dutch pairing algorithm for Swiss tournaments. When I look at FIDE's list of endorsed pairing programs I see that most of them use JaVaFo. How can I get this engine and use…
Brian Towers
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How do I determine the bye player in a Swiss tournament?

The FIDE basic rules for Swiss systems mention: (c) Should the number of players to be paired be odd, one player is unpaired. This player receives a pairing-allocated bye: no opponent, no colour and as many points as are rewarded for a win, unless…
Wais Kamal
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Chess pairing program for double round robin

We have regular friendly matches in our chess club. So far we have used an older version of swiss manager for swiss and round robin; but today when we had to pair using double round robin format, I was so puzzled. Is there a chess pairing system…
Arun J
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Intervening with swiss pairing

In connection with the Hou Yifan incident in Gibraltar I read that when doing the pairings they avoided matches between players from Iran and Israel (for whatever reason...). How is this technically done in a Swiss pairing system? Is there an…
user1583209
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Weekly pairings in a non repetitive way?

I'm part of a local chess club and we play once a week, 4 or 5 games. The way pairings are done is by Swiss style pairings where in the first round the top half is paired against the bottom half. Which is fine if it's a one off but what ends up…
user35424
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