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A new variance reduciton technique

Posted By: MaX
Date: Monday, 30 March 2009, at 2:13 p.m.

In Response To: A new variance reduciton technique (Bob Koca)

Hi Bob,

just to be sure I do understand exactly what you are proposing: your trick tries to give comparable luck to the two plays' games. But if Dahl's Var.Red. is perfect (i.e. it factors out luck perfectly), this would be unnecessary, right ?

A few comments (assuming my understanding is right):

1. Instead of going for the same rank, you could (at negliectible cost) select the roll for play B that gives the closest luck to the one obtained for play A. Should be more efficent than just taking the roll with the same rank.

2. I'm not sure gnubg uses 2ply for luck evaluation. If it uses 0 ply (as I remember, but I could be wrong, mabe it is 0ply just for match analysis luck evals), introducing your trick would cost something in terms of speed (actually, quite a lot I would say, knowing that each additional ply cost more or less a factor 21). If somebody on gnubg mailing list can confirm that ....

MaX.

Messages In This Thread

• A new variance reduciton technique
  Bob Koca -- Sunday, 29 March 2009, at 7:47 p.m.
  • A new variance reduciton technique
    David Rockwell -- Monday, 30 March 2009, at 4:08 a.m.
    • A new variance reduciton technique
      Bob Koca -- Monday, 30 March 2009, at 4:43 a.m.
    • A new variance reduciton technique
      Bob Koca -- Monday, 30 March 2009, at 4:51 a.m.
  • A new variance reduciton technique
    Matt Cohn-Geier -- Monday, 30 March 2009, at 4:56 a.m.
    • A new variance reduciton technique
      Bob Koca -- Monday, 30 March 2009, at 5:34 a.m.
      • A new variance reduciton technique
        Stick -- Monday, 30 March 2009, at 5:38 a.m.
        • A new variance reduciton technique
          Matt Cohn-Geier -- Monday, 30 March 2009, at 5:42 a.m.
  • A new variance reduciton technique
    MaX -- Monday, 30 March 2009, at 2:13 p.m.
    • A new variance reduciton technique
      Bob Koca -- Monday, 30 March 2009, at 2:57 p.m.
      • A new variance reduciton technique
        Maik Stiebler -- Tuesday, 31 March 2009, at 10:21 a.m.
      • A new variance reduciton technique
        MaX -- Tuesday, 31 March 2009, at 11:15 a.m.
  • A new variance reduction technique
    Walter Trice -- Tuesday, 31 March 2009, at 5:37 a.m.
  • I tried it
    Tom Keith -- Wednesday, 1 April 2009, at 1:18 a.m.
    • I tried it
      Bob Koca -- Thursday, 2 April 2009, at 3:15 p.m.
      • I tried it
        Tom Keith -- Thursday, 2 April 2009, at 6:37 p.m.