Canadian Chess Open Championship: Pairing Issues

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  • #46
    Re: Canadian Chess Open Championship: Round 3 Farce.

    [QUOTE=Alan Baljeu;25594
    Better yet, there ought to be a program that validates pairings. I know I could write one in short order (not that short), and it would instantly give a TD a heads up about any bad matches that Swiss Sis might have created. Correcting pairings is another matter, much harder than identifying problems, but that can be left up to the TD and the pairing software. This validator would simply check the result and be your guarantee of quality.[/QUOTE]

    I am not so sure it is possible to define "bad matches" so clearly that a program could take over... obviously, one can catch potential mistakes like someone with 3.5 points playing a player with 2 points, but there may be situations where that may be the proper pairing. Writing the program would be simple; writing the rules for the program to check - not so much.
    ...Mike Pence: the Lord of the fly.

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    • #47
      Re: Canadian Chess Open Championship: Round 3 Farce.

      Originally posted by Matthew Scott View Post
      The entire tournament has been rendered inequitable.
      All large multi-class Swisses are inequitable. Equitable is a Round-robin or Scheveningen. The swiss system was made for determining a winner, and even then an early "Swiss sacrifice" can bring a late winner (like the 2004Canadian Closed) while another player battles on top boards round after round.

      Part of the attraction for class players in this kind of tournament is the gamble that the pairings will work in their favour at the right time to get the class prize. Win too many games early, then get mashed by the masters. Look at past Canadian Opens, players who win prizes with only 4 or 5 points often didn't face the hardest opposition or have the highest performance rating. And a class prize can be won by a rising underrated junior or somebody who plays alot better at one-round-a- day, or gets Whites against similar-rated players. It is not fair. Getting to play players outside your class, being taught a lesson by a stronger player and finding a way to defeat lower rated players is part of the experience. Enjoy the craziness.

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      • #48
        Pairings

        are ridiculous. I want my money back.
        Shameless self-promotion on display here
        http://www.youtube.com/user/Barkyducky?feature=mhee

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        • #49
          Re: Pairings

          This tournament is looking like some amateur ish, to be honest.
          everytime it hurts, it hurts just like the first (and then you cry till there's no more tears)

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          • #50
            Re: Canadian Chess Open Championship: Round 3 Farce.

            Originally posted by Peter McKillop View Post
            David, is Hal responsible for doing the pairings (or ensuring their correctness if the data input is handled by others)? Looking at info provided by Matthew Scott & others, it seems that it should have been clear to the experienced observer, early on, that there were problems with the pairings. Weren't the pairings checked before they were posted? Is someone wearing too many hats (again)?
            1. Hal is Chief TD, so he's responsible.

            2. I'm quite sure that Hal carried out his duties. He is aware of the problems with the software, and he is putting in the time and effort to get the pairings correct. I can't comment on how it turned out, as I haven't looked into it myself.

            3. Too many hats: well, it would help if more people volunteered. Even if more people simply volunteer for the Organizer staff, that frees up the TD staff to concentrate on directing duties.

            Regards,

            David

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            • #51
              Re: Pairings

              Originally posted by Bindi Cheng View Post
              are ridiculous. I want my money back.
              The pairing today is "right" - the problem is Round 3 was done wrong, and players who should have lost, won. That means those players have 3 points, even if they lost in Round 4.

              Some players lost in Round 3 and won against tougher opponents in Round 4 (like myself), and would have been up there anyway to likely get beaten down. That, however, is a different thing.

              Comment


              • #52
                Round 5 Pairings -2010 Canadain Open

                This is my first time to play in a Canadian Open chess tournament using both the accelerated pairings and the hyper accelerated pairings for the first 4 rounds. And it has totally opened my eyes - to both the advantage and disadvantage of these systems of pairings.

                No offence to the organizers. I just want to express my observations.

                The system of pairings was adopted in such a way as to generate exciting chess at the top quartile for the first 4 rounds. To prevent loop sided games. What i noticed is that this was not close to perfection.

                Looking at the round 5 pairings, this is now where big rating differences ( more than 400 rating points) between paired players happen - unfortunately. The players in this category ( rated 2300+ to 2000+) is now going to bear the effect of the exciting games generated in the previous rounds.

                Still, i thank the organizers for staging this Canadian Open. But i will be thinking 2x next time when these pairing systems are used.

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                • #53
                  Re : Round 5 Pairings -2010 Canadain Open

                  Code:
                  6 Razvan Preotu (1606 : w : 3.5) 	  GM Alexander Shabalov (2578 : b : 3.5)
                  7 Wayne Siu (1449 : W : 3.5) 	IM Nikolay Noritsyn (2536 : b : 3.5)
                  8 GM Vladimir Malaniuk (2551 : w : 3.0) 	Ferdinand Supsup (1851 : b : 3.5)
                  There's definitely something wrong... I just don't understand why there's only one section in the Canadian Open. The Quebec Open is bigger than the Canadian Open, while it covers a smaller population. Maybe you would get more players if they were 5 or 6 sections, just as in the COQ...

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                  • #54
                    Re: Pairings

                    Yea this is pretty stupid now.

                    Comment


                    • #55
                      Re: Canadian Chess Open Championship: Round 3 Farce.

                      Originally posted by Kerry Liles View Post
                      I am not so sure it is possible to define "bad matches" so clearly that a program could take over... obviously, one can catch potential mistakes like someone with 3.5 points playing a player with 2 points, but there may be situations where that may be the proper pairing. Writing the program would be simple; writing the rules for the program to check - not so much.
                      I didn't say the program takes over. I said the program shows what the problems are. A program can very easily point out all the point mismatches. It's slightly more complex to get the program to limit complaints to "gross violations relative to the tournament format", but I'm sure I could do that too.

                      The program merely identifies potential problems. The arbiter decides whether to solve them or how.

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                      • #56
                        Re: Re : Round 5 Pairings -2010 Canadain Open

                        Having played in four Canadian opens and several large class events I must say that I prefer the "Open" format. Part of the excitement of entering these events is the chance to meet and maybe draw (a win may be too big a dream) an Internationally titled player. I played in the Hogeschool Open in the Netherlands last year and met a 2500+ GM. Yes, I lost, but since it was carried on the internet as one of the top ten boards there was an added excitement to it. In 1973 at the Canadian Open in Ottawa I held GM and former US Champion Arnold Denker to a draw in a 5 hour struggle. It happened 37 years ago but I still remember it. What seems unusual about these accelerated pairings is that rather than having the huge discrepancy in ratings in the first round pairings it is happening four rounds later. Again, not a huge difference. As you can see from the above, I would prefer to keep the Open, open to all!

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                        • #57
                          Re: Pairings

                          I honestly believe it will balance out. If a pairing was too hard and you lost, you will have a lower score, get an easy game, and win. If it was too easy and you won, you will have a higher score, get a harder game and lose. Now if a pairing was too easy and you lost, don't blame the pairing system.

                          The same goes for all your competitors.

                          Late in the tournament it's too late for this corrective effect, but early on there's lots of time for balance to take place.

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                          • #58
                            Re: Round 5 Pairings -2010 Canadain Open

                            Felix, it's not wrong. Unless you have two sections, you're bound to have a few amateurs, who are having a really good tournament play some strong players. If it weren't for the accelerated system, the entire tournament would have experienced that imbalance. Round 1 would then be a waste of time.

                            Like Howard says, it's great to have a chance to play the big guys.

                            Comment


                            • #59
                              Re: Round 5 Pairings -2010 Canadain Open

                              Originally posted by Alan Baljeu View Post
                              Felix, it's not wrong. Unless you have two sections, you're bound to have a few amateurs, who are having a really good tournament play some strong players. If it weren't for the accelerated system, the entire tournament would have experienced that imbalance. Round 1 would then be a waste of time.

                              Like Howard says, it's great to have a chance to play the big guys.
                              So, instead of "Round 1 would then be a waste of time." we now have: "several other rounds are a waste of time"

                              and, "it's great to have a chance to play the big guys." is fine unless you are one of the "big guys".

                              I suppose a free point for them is fine since they don't need any norms.
                              ...Mike Pence: the Lord of the fly.

                              Comment


                              • #60
                                Re: Round 5 Pairings -2010 Canadain Open

                                Originally posted by Erwin Casareno View Post
                                This is my first time to play in a Canadian Open chess tournament using both the accelerated pairings and the hyper accelerated pairings for the first 4 rounds. And it has totally opened my eyes - to both the advantage and disadvantage of these systems of pairings.

                                No offence to the organizers. I just want to express my observations.

                                The system of pairings was adopted in such a way as to generate exciting chess at the top quartile for the first 4 rounds. To prevent loop sided games. What i noticed is that this was not close to perfection.

                                Looking at the round 5 pairings, this is now where big rating differences ( more than 400 rating points) between paired players happen - unfortunately. The players in this category ( rated 2300+ to 2000+) is now going to bear the effect of the exciting games generated in the previous rounds.

                                Still, i thank the organizers for staging this Canadian Open. But i will be thinking 2x next time when these pairing systems are used.
                                The problem isn't the accelerated or hyper accelerated pairings, its the Round 3 mistake which saw players who didn't deserve to win, win. These players thus have 3 points instead of 2, with a few exceptions for players who won in Round 4 against significantly better opposition.

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