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## [Bug-gnubg] quasi-random dice for the Initial Position

**From**: |
Robert-Jan Veldhuizen |

**Subject**: |
[Bug-gnubg] quasi-random dice for the Initial Position |

**Date**: |
Mon, 07 Jul 2003 02:14:00 +0200 |

Hi there, I also posted this on GOL.

`I've understood from Jim Segrave that quasi-random dice just discards
``doubles for the opening rolls, effectively rotating 30 rolls.
`

`However, I still have a question about this. Normally when I do a rollout,
``I would get one complete rotation for the first roll when I set 36 trials.
`

`Suppose I use 36 trials for the opening roll. Will it now try to rotate the
``opening roll, find out after 30 trials that one rotation is done and start
``another rotation for the remaining 6 trials that it can't complete? Or will
``it use random dice for the remaining 6 trials?
`

`Now, the same question for using 30 trials for the opening roll. Will this
``in practice produce exactly one rotation of non-double rolls? Or will gnubg
``think 30 trials is not enough for a complete rotation and just use random
``dice then?
`

`More realistically, what exactly happens when I use 1080 trials from the
``initial position? Will this rollout recognize it can do a complete rotation
``of the first two rolls (30*36)? Or will it think less than 1296 trials is
``not enough for rotation of both rolls and just rotate the first roll?
`

`What happens when one use 1296 trials? Will this give potentially skewed
``results perhaps?
`

`Any comments welcome, especially from the gnubg team. It's hard to find out
``what gnubg does just by running tests here. Joern Thyssen's earlier
``explanation doesn't mention rotation with 30 rolls instead of 36, so I have
``some worries about what GNUBG exactly does here, and whether it's consistent.
`
TIA,
--
Robert-Jan Veldhuizen

**[Bug-gnubg] quasi-random dice for the Initial Position**,
*Robert-Jan Veldhuizen* **<=**
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Nardy Pillards*, `2003/07/06`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Robert-Jan Veldhuizen*, `2003/07/06`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Jim Segrave*, `2003/07/07`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Joern Thyssen*, `2003/07/07`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Jim Segrave*, `2003/07/07`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Joern Thyssen*, `2003/07/07`
**Re: [Bug-gnubg] quasi-random dice for the Initial Position**, *Jim Segrave*, `2003/07/07`