Questions tagged [swiss-pairing]
For questions about the Swiss Pairing method which is used in some (open) tournaments to determine who plays against whom.
38
questions
2
votes
2
answers
81
views
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. ...
- 21
1
vote
1
answer
97
views
Swiss pairings software ignoring colors?
I am looking for a tool that could manage a tournament and calculate the pairings (with Swiss or accelerated Swiss system) with an option to ignore black and white colors.
This software, with the ...
- 15.8k
1
vote
0
answers
34
views
Chess960 Swiss tournament tips
Does anyone have recommendations for a Chess960 Swiss tournament, where each round is a new position?
A possible problem is that some of the start positions are quite advantageous for White, so it may ...
- 749
2
votes
1
answer
302
views
Manual pairings in tournaments
I had recently participated in a tournament and I think there is some manual pairing hidden inside which causes my friend to play against me. Since my friend had a higher score, I had to give up and ...
- 23
2
votes
3
answers
168
views
Correct swiss pairings for a group of 4 players
Say we have a situation that's not super uncommon in swiss tournaments. There are four people currently tied with the most points, where #1 and #3 have just played White (for example), while #2 and #4 ...
- 19.8k
0
votes
1
answer
81
views
Are there any official rules which govern the announcement of pairings for a FIDE rated tournament?
Are there any specific rules for the pairing announcement, like they have to be announced "x" hours before the start of the next round? Or does it completely depend upon the tournament ...
- 1,485
3
votes
1
answer
153
views
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. ...
- 15.4k
1
vote
1
answer
286
views
USCF and FIDE: Is it legal to organize a tournament with the Monrad System? Monrad: rank 1 versus 2, in the first round. Swiss: 1 versus 5
We started to use the Monrad system:
https://rankedin.ladesk.com/043159-2152--Monrad
https://en.wikipedia.org/wiki/Swiss-system_tournament
We are organizing a monthly tournament valid for ELO rating ...
- 1,242
3
votes
3
answers
1k
views
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; ...
- 638
7
votes
1
answer
2k
views
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 ...
- 15.4k
3
votes
1
answer
836
views
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 ...
- 15.4k
1
vote
1
answer
150
views
Worst B/W ratio
Is the worst B/W ratio you can get in a "natural" tournament a Swiss 5 round with lifted color check in the last round, BBWBB? (Did that actually happen in real life?)
(Obviously, you can ...
- 15.4k
1
vote
0
answers
109
views
How does the likelihood of a pairing jam change as the number of players increases?
Background
A few weeks ago I was asked to be the arbiter for one of a sequence of 15 round Swiss blitz tournaments. At the pre-tournament briefing a few days before we were told that if the number of ...
- 94.5k
0
votes
2
answers
142
views
What is a good approach to conduct a round robin event for 20 players in order to select top 6?
I need to have a selection event for 20 players to select 6 players for a team. Plan is to have a round robin event since it is fairer compared to a swiss event. Then each player will have to play 19 ...
- 2,316
1
vote
1
answer
482
views
Pairing Preference in Swiss Tournament System
Suppose we have 10 players A, B, C, D, E, F, G, H, I, J (sorted by their ranks).
First-round pairs are A - F, B - G, C - H, D - I, E - J and players A, B, C, D, E win their matches.
What should be the ...
6
votes
4
answers
1k
views
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 ...
- 695
2
votes
1
answer
88
views
Record Swiss top tie
In a current German championship, a whopping 11 players currently have 5/6. The fact that 197 players are listed makes this a bit less remarkable, of course. Obviously, the probability p of such an ...
- 15.4k
3
votes
2
answers
769
views
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 ...
- 94.5k
0
votes
2
answers
154
views
Why do receive higher ranked players a downfloat in fide swiss pairing?
I am trying to grok the fide specification of the swiss pairing algorithm, having a hard time with that.
For example rule A.4.b reads:
A4
[...]
b
After two players with different scores have played ...
user27863
-1
votes
1
answer
303
views
A Swiss nightmare
Inspired by a recent question, here a fantasy:
The Superduperquantumcomputer "Deep Ponder" has cracked Chess. Assume a 9 round Swiss tournament with 2^9 players, White always wins. Will the ...
- 15.4k
5
votes
1
answer
952
views
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?
- 94.5k
2
votes
1
answer
179
views
How does the JaVaFo engine work and how random are the pairings?
In most official FIDE tournaments, the JaVaFo engine is used to pair the players according to some FIDE-defined rules. What are those rules and how random are the pairings (i.e. can I reproduce them ...
- 4,285
10
votes
2
answers
876
views
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 ...
- 4,285
2
votes
1
answer
289
views
Swiss system pairing algorithm stuck
I'm building a Swiss System algorithm and have the following scenario.
10 participants.
8 rounds are to be played.
Generating round 8, I have three players that haven't played each other.
These three ...
- 21
9
votes
2
answers
13k
views
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.
- 1,896
2
votes
1
answer
274
views
Predicting color and opponent
Is there any way to predict, with some certainty, my next opponent and color for next round in a swiss tournement on chess-result:
http://chess-results.com/tnr406767.aspx?lan=1
- 435
1
vote
2
answers
241
views
In what way is it allowed to alter tournament pairings in favor of a player?
The FIDE Rules for Swiss Systems state:
C.04.2 A It is not allowed to alter the correct pairings in favour of any player.
and then further state:
Where it can be shown that modifications of ...
- 3,022
3
votes
2
answers
4k
views
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 ...
- 3,022
0
votes
1
answer
111
views
Multiple teams from the same country in Swiss system
Doesn't it create bias for the country?
Disclaimer: I realize that benefits of having more teams from the same country far outweigh possible drawbacks, just trying to reason how possibly "unfair" can ...
- 103
2
votes
2
answers
6k
views
Swiss Pairing Algorithm
I am building a simple Android application for hosting Chess tournaments, I am having some difficulty implementing a Swiss paring algorithm, I need link to an article or a paper that explains how I ...
- 517
4
votes
3
answers
1k
views
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 ...
- 649
-3
votes
1
answer
453
views
Swiss system chess tournament
In a swiss system chess tournament, how long should a round last? If a player exceeds his time who will be the winner?
-2
votes
3
answers
993
views
Why can't FIDE use a Non-Deterministic Gender Neutral Swiss Pairing system?
I have been following the controversy surrounding the pairings of Hou Yifan at the IOM chess tournament 2017. She was paired with 4 consecutive female players, this is following her last open swiss ...
1
vote
1
answer
852
views
Difference between Swiss Manager Light and Full version?
I just realized that there are two versions of Swiss Manager. Does anyone know the difference?
- 1,837
3
votes
1
answer
745
views
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 ...
- 1,837
2
votes
4
answers
1k
views
Swiss pairing parameters
I realize that there are various types of Swiss pairing systems. What would be a minimum set of parameters that needs to be specified in order to avoid ambiguity in pairings? I am thinking of ...
- 20.7k
3
votes
1
answer
203
views
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 ...
- 20.7k
9
votes
6
answers
19k
views
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....
- 215