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Swiss vs random draw

Posted By: Tom Keith
Date: Tuesday, 12 March 2013, at 7:18 p.m.

In Response To: Swiss vs random draw (Bob Koca)

It wasn't me, but that's a good guess because I just wrote a quick and dirty simulation.

I used 64 players and 12 rounds. I didn't bother ensuring that players who met previously didn't play each other again. I ranked the players 1 to 64. Matches were set up so that each higher place in rank represented 0.5% greater chances of winning. If the top player played the bottom player (63 places diff), he had a 31.5% advantage (65.75% vs. 34.25%) chance of winning the match.

I calculated the correlation of the true ranking of the players against their ranking as determined by the tournament. For a random tournament it was 0.281; for a Swiss tournament it was 0.262. So it seems Swiss is worse for strong players.

Messages In This Thread

• Swiss vs random draw
  Robert Wachtel -- Tuesday, 12 March 2013, at 5:04 p.m.
  • Swiss vs random draw
    Bob Koca -- Tuesday, 12 March 2013, at 5:53 p.m.
    • Swiss vs random draw
      Tom Keith -- Tuesday, 12 March 2013, at 7:18 p.m.
      • Swiss vs random draw
        Frank Berger -- Tuesday, 12 March 2013, at 9:17 p.m.
      • Swiss vs random draw
        Timothy Chow -- Tuesday, 12 March 2013, at 11:00 p.m.
        • Swiss vs random draw
          Tom Keith -- Wednesday, 13 March 2013, at 12:50 a.m.
          • Swiss vs random draw
            Bob Koca -- Wednesday, 13 March 2013, at 1:26 a.m.
            • Swiss vs random draw
              Havard Raddum -- Wednesday, 13 March 2013, at 10:04 a.m.
            • Revised chart
              Tom Keith -- Thursday, 14 March 2013, at 3:59 p.m.
              • Revised chart in colour
                playBunny -- Thursday, 14 March 2013, at 6:29 p.m.
                • Revised chart in colour
                  Robert Wachtel -- Thursday, 14 March 2013, at 7:36 p.m.
              • Revised chart
                Joe Russell -- Saturday, 16 March 2013, at 1:35 p.m.
          • Swiss vs random draw
            playBunny -- Wednesday, 13 March 2013, at 4:26 p.m.
          • Swiss vs random draw
            Robert Wachtel -- Thursday, 14 March 2013, at 3:12 a.m.
            • Swiss vs random draw
              Timothy Chow -- Thursday, 14 March 2013, at 2:59 p.m.
            • Swiss vs random draw
              Tom Keith -- Thursday, 14 March 2013, at 4:09 p.m.
        • Swiss vs random draw
          Robert Wachtel -- Thursday, 14 March 2013, at 1:20 a.m.
          • Swiss vs random draw
            Timothy Chow -- Thursday, 14 March 2013, at 3:01 p.m.
  • Swiss vs random draw
    Bill Riles -- Tuesday, 12 March 2013, at 6:54 p.m.
    • Swiss vs random draw
      bayblitz -- Tuesday, 12 March 2013, at 10:00 p.m.
  • Swiss vs random draw
    neilkaz -- Tuesday, 12 March 2013, at 7:06 p.m.
  • Swiss vs random draw
    bayblitz -- Tuesday, 12 March 2013, at 7:58 p.m.
    • Swiss vs random draw
      Daniel Murphy -- Wednesday, 13 March 2013, at 2:38 a.m.
  • Swiss vs random draw
    Phil Simborg -- Friday, 15 March 2013, at 12:48 a.m.
    • Swiss vs random draw
      Bob Koca -- Friday, 15 March 2013, at 12:59 a.m.
      • Swiss vs random draw
        Phil Simborg -- Friday, 15 March 2013, at 3:14 a.m.
    • Swiss vs random draw
      Robert Wachtel -- Friday, 15 March 2013, at 11:00 a.m.
      • Swiss vs random draw
        Bob Koca -- Friday, 15 March 2013, at 3:37 p.m.
        • Swiss vs random draw
          Robert Wachtel -- Friday, 15 March 2013, at 8:03 p.m.
          • Swiss vs random draw
            Bob Koca -- Friday, 15 March 2013, at 9:49 p.m.
      • Swiss vs random draw
        Matt Reklaitis -- Friday, 15 March 2013, at 6:01 p.m.
      • Swiss vs random draw
        Martin -- Tuesday, 19 March 2013, at 9:37 p.m.
    • Swiss vs random draw
      Art Grater -- Sunday, 17 March 2013, at 8:14 a.m.