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Scale of Open/Intermediaate Players

Posted By: Ian Shaw
Date: Tuesday, 28 April 2009, at 8:50 a.m.

In Response To: Scale of Open/Intermediaate Players (Coolrey)

"Why the HELL Gnu can't have a Gnu error rate is beyond me!

It will say that you played 3.3 on Gnu which is expert, while on Snowie it would be 1.1 point below World Class!

ERs in the 5s and 6s earned advanced and intermediate. Gnu grades hard. "

Snowie divides your errors by the sum of moves played, yours plus your opponents. Gnu copies this method for the reported "Snowie equivalent error rate".

For Gnu's native error rate it divides your errors by the sum of only your unforced moves. Therefore, it is almost inevitable that the Gnu error rate will be at least half the the Snowie error rate.

However, the text gradings are based on the Gnu error rate, but the thresholds for each grade are based on the rates set by the Snowie developers. This is an anomaly, which means that Gnubg does indeed "grade very hard".

Still, it keeps you on your toes, eh?

The discussion of which method is better is complex. Gnubg's method seems more intuitive to most. However, Douglas Zare wrote a gammon village article some while ago explaining why he thought the Snowie method was superior. I don't recall his reasons, but I have a lot of respect of his opinions.

Messages In This Thread

• Scale of Open/Intermediaate Players
  Rory -- Sunday, 26 April 2009, at 3:27 p.m.
  • Scale of Open/Intermediaate Players
    David Rockwell -- Sunday, 26 April 2009, at 3:42 p.m.
    • Scale of Open/Intermediaate Players
      Dan Pelton -- Monday, 27 April 2009, at 5:38 a.m.
  • Scale of Open/Intermediate Players
    Bill Riles -- Sunday, 26 April 2009, at 4:34 p.m.
  • Scale of Open/Intermediaate Players
    Coolrey -- Sunday, 26 April 2009, at 5:34 p.m.
    • Scale of Open/Intermediaate Players
      Rich Munitz -- Sunday, 26 April 2009, at 7:08 p.m.
    • Scale of Open/Intermediaate Players
      Jason Lee -- Sunday, 26 April 2009, at 7:48 p.m.
      • Scale of Open/Intermediaate Players
        Coolrey -- Sunday, 26 April 2009, at 11:37 p.m.
        • Scale of Open/Intermediaate Players
          Jason Lee -- Monday, 27 April 2009, at 12:05 a.m.
    • Scale of Open/Intermediaate Players
      Ian Shaw -- Tuesday, 28 April 2009, at 8:50 a.m.
      • Scale of Open/Intermediaate Players
        Stick -- Tuesday, 28 April 2009, at 9:02 a.m.
        • Scale of Open/Intermediaate Players
          Jason Lee -- Tuesday, 28 April 2009, at 11:14 p.m.
          • Scale of Open/Intermediaate Players
            Maik Stiebler -- Wednesday, 29 April 2009, at 3:44 p.m.
            • Scale of Open/Intermediaate Players
              Jason Lee -- Wednesday, 29 April 2009, at 4:57 p.m.
              • Scale of Open/Intermediaate Players
                Maik Stiebler -- Wednesday, 29 April 2009, at 9:17 p.m.
                • Scale of Open/Intermediaate Players
                  Jason Lee -- Wednesday, 29 April 2009, at 10:47 p.m.
                  • Scale of Open/Intermediaate Players
                    Maik Stiebler -- Thursday, 30 April 2009, at 5:04 a.m.
                    • Scale of Open/Intermediaate Players
                      Matt Cohn-Geier -- Thursday, 30 April 2009, at 5:16 a.m.
                      • Scale of Open/Intermediaate Players
                        Maik Stiebler -- Thursday, 30 April 2009, at 5:51 a.m.
                        • Scale of Open/Intermediaate Players
                          Jason Lee -- Thursday, 30 April 2009, at 3:46 p.m.
                          • Scale of Open/Intermediaate Players
                            Maik Stiebler -- Thursday, 30 April 2009, at 8:36 p.m.
                            • Scale of Open/Intermediaate Players
                              Jason Lee -- Thursday, 30 April 2009, at 9:59 p.m.
                              • Scale of Open/Intermediaate Players
                                Maik Stiebler -- Friday, 1 May 2009, at 7:29 a.m.
                                • Scale of Open/Intermediaate Players
                                  Maik Stiebler -- Friday, 1 May 2009, at 7:42 a.m.
                          • Scale of Open/Intermediaate Players
                            Douglas Zare -- Monday, 4 May 2009, at 8:53 a.m.
                        • Scale of Open/Intermediaate Players
                          Matt Cohn-Geier -- Thursday, 30 April 2009, at 7:09 p.m.
                          • Scale of Open/Intermediaate Players
                            Maik Stiebler -- Thursday, 30 April 2009, at 8:52 p.m.
  • Scale of Open/Intermediate Players
    Marv Porten -- Sunday, 26 April 2009, at 6:30 p.m.
  • Scale of Open/Intermediaate Players
    mamabear -- Sunday, 26 April 2009, at 6:51 p.m.
  • Scale of Open/Intermediaate Players
    DanielP -- Monday, 27 April 2009, at 10:57 a.m.
  • ERs at recent Monte Carlo World Championships
    Marv Porten -- Monday, 27 April 2009, at 6:41 p.m.
    • ERs at recent Monte Carlo World Championships
      David Rockwell -- Monday, 27 April 2009, at 7:08 p.m.
      • ERs at recent Monte Carlo World Championships
        Jason Lee -- Monday, 27 April 2009, at 8:20 p.m.
      • ERs at recent Monte Carlo World Championships
        Chuck Bower -- Monday, 27 April 2009, at 9:14 p.m.
        • ERs at recent Monte Carlo World Championships
          Matt Cohn-Geier -- Monday, 27 April 2009, at 9:34 p.m.
          • ERs at recent Monte Carlo World Championships
            David Rockwell -- Monday, 27 April 2009, at 9:48 p.m.
            • ERs at recent Monte Carlo World Championships
              Matt Cohn-Geier -- Monday, 27 April 2009, at 11:48 p.m.
            • ERs at recent Monte Carlo World Championships
              Bill Riles -- Monday, 27 April 2009, at 11:53 p.m.
              • ERs at recent Monte Carlo World Championships
                Bill Riles -- Monday, 27 April 2009, at 11:57 p.m.
        • ERs at recent Monte Carlo World Championships
          David Rockwell -- Monday, 27 April 2009, at 9:41 p.m.
          • ERs at recent Monte Carlo World Championships
            Chuck Bower -- Tuesday, 28 April 2009, at 12:59 a.m.
            • ERs at recent Monte Carlo World Championships
              David Rockwell -- Tuesday, 28 April 2009, at 1:16 a.m.
              • ERs at recent Monte Carlo World Championships
                John O'Hagan -- Tuesday, 28 April 2009, at 1:42 a.m.
                • ERs at recent Monte Carlo World Championships
                  Bill Riles -- Tuesday, 28 April 2009, at 2:01 a.m.
                  • ERs at recent Monte Carlo World Championships
                    John O'Hagan -- Tuesday, 28 April 2009, at 2:34 a.m.
            • ERs at recent Monte Carlo World Championships
              Coolrey -- Tuesday, 28 April 2009, at 7:44 p.m.
        • ERs at recent Monte Carlo World Championships
          Coolrey -- Monday, 27 April 2009, at 10:26 p.m.
          • ERs at recent Monte Carlo World Championships
            Jason Lee -- Monday, 27 April 2009, at 10:42 p.m.
          • ERs at recent Monte Carlo World Championships
            John O'Hagan -- Tuesday, 28 April 2009, at 1:38 a.m.
            • ERs at recent Monte Carlo World Championships
              Stick -- Tuesday, 28 April 2009, at 7:53 a.m.
              • ERs at recent Monte Carlo World Championships
                John O'Hagan -- Tuesday, 28 April 2009, at 12:40 p.m.
            • hi
              Iancho Hristov -- Wednesday, 29 April 2009, at 7:29 a.m.
        • ERs at recent Monte Carlo World Championships
          Bob Koca -- Monday, 27 April 2009, at 10:54 p.m.
          • ERs at recent Monte Carlo World Championships
            Chuck Bower -- Tuesday, 28 April 2009, at 12:52 a.m.
          • ERs at recent Monte Carlo World Championships
            Jason Lee -- Tuesday, 28 April 2009, at 1:39 a.m.
  • WC Player/Intermediaate speller *NM* *NM*
    Tad Bright -- Monday, 27 April 2009, at 11:09 p.m.