Talk:Backgammon opening theory

message: What about the doubles openings?
I believe the game cannot begin with a double. The first move is according to the one-cube roll that determines which player plays first. This roll is repeated till decided. See also http://en.wikipedia.org/wiki/Backgammon Idan Yelin
A game cannot open with a double.  When a double in encountered on the opening roll (by each player using 1 die), then the doubling cube in incremented 1 notch.  asheets
:I guess that's true, but sometimes there are "house rules" which are different from the official rules. Some house rules allow for openings with a double...which always leaves me clueless ;-), so it would be nice to know what to with a 6-6 throw. If one ever bothered to bother a computer program with unoffical rules. --Klaws 20:25, 7 August 2006 (UTC)
replies: text: If you allow opening doubles then I'd say a 6-6 opener is a no-brainer: 24/18 (x2) + 13/7 (x2). -- Hux 19:49, 16 March 2007 (UTC)
replies: text: I rolled them out a few months ago, but as far as I know there is no reliable source for us to cite for the article. 6-6: 24/18(2) 13/7(2). 5-5: 13/3(2). 4-4: 13/5(2), or 24/20(2) 13/9(2) at gammon-go. 3-3: 8/5(2) 6/3(2), or 24/21(2) 13/10(2) at gammon-save. 2-2: 13/11(2) 6/4(2) or 24/22(2) 6/4(2) at gammon-save. 1-1: 8/7(2) 6/5(2) or 24/22 6/5(2) at gammon-save. Cheers. —ptk✰fgs 23:10, 16 March 2007 (UTC)
thread_title:  Doubles 

message: If an important point of this article is that computer simulation led to changes, I for one would like to see what they changed *from*.  What was the "opening book" as of 1970? --Jonrock 18:06, 7 August 2006 (UTC)
replies: text: The self-teaching computer programs simply learned by playing an extremely huge number of games against itself. In other words, they found the "winning moves" simply by trying out. The resulting strategy is therefore based on statistics gatheredduring the learning process. Patience, endurance and speed is one of the major advantages of computers over humans. Artificial neural networks are typicaly used for such programs. --Klaws 20:34, 7 August 2006 (UTC)
thread_title:  Changed from what? 

message: I edited the third line as it was misleading, implying that all deterministic games have slower growing game trees than a game that has an element of chance like backgammon. e.g. look at the deterministic games such as Arimaa. --Rajah 18:17, 7 August 2006 (UTC)
replies: text: No need to be offended. I think it is accurate to say that three chapters on the opening game (which is quite a bit, as backgammon books go) does not really compare to the sheer volume of text written about chess openings (i.e., several whole encyclopedias). Perhaps there is a better way of wording it, but I think what it's getting at is accurate. —ptk✰fgs 20:33, 7 August 2006 (UTC)
thread_title:  Deterministic games and game tree 

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