Swiss pairing questions

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  • Swiss pairing questions

    In the fourth and final round of a four round Swiss tournament, first place with 3.0 points is matched against second place with 2.5 points. During the first three rounds, both players have played white twice. Would the player in first place or the player in second place receive the white pieces in the fourth and final round? What criteria is used to make the decision?

    Question 2: In a five round Swiss tournament and two players are paired together for the fifth and final round. Which criteria is used to determine which player receives the white pieces. For example, would the decision be based on the players ratings or their current point totals in the tournament standings?

    Please advise.

  • #2
    Re: Swiss pairing questions

    Prior to computerized pairing software, many TD's would simply write "Toss" on the pairings - i.e. a random toss for colours - whenever such last-round situations happened.

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    • #3
      Re: Swiss pairing questions

      Originally posted by Bill Thornton View Post
      In the fourth and final round of a four round Swiss tournament, first place with 3.0 points is matched against second place with 2.5 points. During the first three rounds, both players have played white twice. Would the player in first place or the player in second place receive the white pieces in the fourth and final round? What criteria is used to make the decision?

      Question 2: In a five round Swiss tournament and two players are paired together for the fifth and final round. Which criteria is used to determine which player receives the white pieces. For example, would the decision be based on the players ratings or their current point totals in the tournament standings?

      Please advise.
      From FIDE website

      E Color Allocation rules

      For each pairing apply (with descending priority):
      E.1
      Grant both colour preferences
      E.2
      Grant the stronger colour preference
      E.3
      Alternate the colours to the most recent round in which they played with different colours
      E.4
      Grant the colour preference of the higher ranked player

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      • #4
        Re: Swiss pairing questions

        Based on the information from the previous posting, the higher ranked player would receive the due colour in the final round. If the higher ranked player played white in the previous round, the higher ranked player would play black in the final round.

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        • #5
          Re: Swiss pairing questions

          In case you use SwissSys, the pairings will look different than Swiss-Manager's pairings. Ignoring color in Swiss-Manager(not recommended) will create the same parings as Swiss-Sys.
          Swiss-Manager is FIDE endorsed and SwissSys is not.

          Below is the list of endorsed programmes (supported by Microsoft Windows) and their respective capabilities:
          a.SWISS MASTER (Koninklijke Nederlandse Schaakbond NED) Dutch System
          b.SWISS MANAGER (Heinz Herzog AUT) Dutch System
          c.WINSWISS (Franz-Josef Weber GER) Dutch System
          d.VEGA (Luigi Forlano ITA) Dubov System
          e.TURNERING SERVICE (Harald Heggelund NOR) Dutch System
          f.Tournament Director (Neil Hayward ENG) Dutch System


          Click image for larger version

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          • #6
            Re: Swiss pairing questions

            Originally posted by Rene Preotu View Post
            Ignoring color in Swiss-Manager(not recommended)
            While it is not recommended, it can be done :)

            While in general it is not allowed to have three same-color games in a row (B.2), the rule can be skipped (C10g, C1).
            http://www.fide.com/fide/handbook.ht...3&view=article

            B2

            Two players with the same absolute colour preference (see A7.a) shall not meet (therefore no player’s colour difference will become >+2 or < -2 nor a player will receive the same colour three times in row)
            Note: If it is helpful to reduce the number of floaters or the score of a floater when pairing top scorers B2 may be ignored.
            If a top scorer is paired against a non-top scorer, the latter is considered a top scorer for colour allocation purposes.

            C10g
            (top scorers)
            Drop B2 and restart from C.3.c

            As it is written, it can be done during all tournament, not only for a final round.

            Comment


            • #7
              Re: Swiss pairing questions

              Originally posted by Bill Thornton View Post
              Based on the information from the previous posting, the higher ranked player would receive the due colour in the final round. If the higher ranked player played white in the previous round, the higher ranked player would play black in the final round.
              Higher ranked - in case of equal points - by rating (not by title); otherwise who has more points.

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              • #8
                Re: Swiss pairing questions

                No, he won't always receive his due colour. Granting the highest rated player his due colour is the last criteria in the list.

                Criteria one is to give both players their due colour. This is not possible in this case. Criteria 2 is to grant the stronger colour preference. Under FIDE rules, a player colour preference can be weak, strong or absolute. To get the colour preference, count +1 for each game played with White and -1 for each game played with Black. If the total is 0, the player has a weak color preference unless he got the same colour in the last two rounds; if the total is +1 or -1 the player has a strong colour preference unless he got the same colour in the last two rounds and if the total is +2 or -2 or if the player got the same colour in the last two rounds, he has an absolute colour preference. For example, it will be WBW vs BWW because BWW has an absolute preference for black, the ratings are irrelevant. The third criteria concerns the colour history, for example, it will always be WWB against WBW regardless of the ratings. The two players did not have the same colour in the last round. We alternate colours based on this round. If all things are equals, for example WBW vs WBW, the highest ranked player will get his due colour. FIDE considers that with equal ratings, a GM his higher, so titles are relevant and if everything is equal, the alphabetical order of the player's names is used.

                Originally posted by Bill Thornton View Post
                Based on the information from the previous posting, the higher ranked player would receive the due colour in the final round. If the higher ranked player played white in the previous round, the higher ranked player would play black in the final round.
                Last edited by Pierre Denommee; Friday, 14th June, 2013, 07:54 PM. Reason: Replaced the BWB by WBW in the example in order to answer the question

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