Computer Dice

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Does Backgammon NJ cheat?

From:   Greg
Date:   20 June 2010
Subject:   Does Backgammon NJ cheat?
Forum:   BGOnline

I must have played 5,000 games. I am ahead of the hardest level by 73%. But
I have been noticing that its much harder for me to enter from the bar,
than the computer. That sets a huge frustration. I have decided to write
down how many rolls I need to enter if slots 1, 2 and 3 places are open vs
the computer. Here what I got after playing 100 of games. Here are the
amount rolls to enter if computer has one place open:
6,4,7,5,5,11,7,3,2,1,3,5,4. The computer rolls to enter in my home.

Here are the amount rolls to enter if computer has 2 places are open:
4,3,4,2,4,3,3,1,1,2,4. The computer rolls to enter in my home if 2 places
are open: 1,1,2,1,1,1,1,1,1,1,1,1,2,1. I will not show about the 3 places
open, because its the similar picture.

The conclusion that the computer is not that intelligent, because he makes
up for entering the board much easier. The reason must be because he play
TOO aggressive game. But what is amazing I am still ahead of the computer

NJ  writes:

I'm 100% positive that you didn't count this accurately. I think I need to
put in a feature that keeps track of this because humans are not reliable
enough to keep accurate statistics. For example, I'm guessing that if you
got off the bar and then got hit the next turn, you might have counted that
as not coming off the bar. Also, how did you handle having 2 pieces on the
bar as opposed to 1?

Backgammon NJ includes extensive features that advanced users can use to
show the game isn't cheating. There is a way to see the dice rolls up to
10000 rolls in advance, and the random number generator is even open
sourced. So you can tell the computer isn't cheating by changing the dice
on you. You can also tell that the computer isn't cheating by looking at
upcoming dice rolls because you can show that it always makes the same
moves for the same position/score (when playing on Expert level at full
strength -- on lower levels it has some randomness to it).
Did you find the information in this article useful?          

Do you have any comments you'd like to add?     


Computer Dice

Dice on backgammon servers  (Hank Youngerman, July 2001) 
Does Agushak Backgammon cheat?  (Mr Nabutovsky, June 2000) 
Does BG by George cheat?  (George Sutty, Nov 1995) 
Does Backgammon NJ cheat?  (Greg+, June 2010) 
Does Cybergammon cheat?  (Goto Informatique, Aug 1996) 
Does David's Backgammon cheat?  (Joseph B. Calderone, June 1998) 
Does GNU Backgammon cheat?  (Robert-Jan Veldhuizen, Nov 2002) 
Does Gammontool cheat?  (Jim Hurley, Sept 1991) 
Does Hyper-Gammon cheat?  (ZZyzx, June 1996) 
Does Jellyfish cheat?  (Fredrik Dahl, June 1997) 
Does MVP Backgammon cheat?  (Mark Betz, Oct 1996) 
Does MonteCarlo cheat?  (Matt Reklaitis, June 1998) 
Does Motif cheat?  (Rick Kiesau+, Mar 2004)  [Long message]
Does Motif cheat?  (Billie Patterson, Feb 2003) 
Does Motif cheat?  (Robert D. Johnson, Oct 1996) 
Does Snowie cheat?  (André Nicoulin, Sept 1998) 
Does TD-Gammon cheat?  (Gerry Tesauro, Feb 1997) 
Error rates with computer dice  (NoChinDeluxe+, Feb 2011) 
FIBS: Analysis of 10 million rolls  (Stephen Turner, Apr 1997)  [Recommended reading]
FIBS: Are the dice biased?  (Kit Woolsey, Oct 1996) 
FIBS: Entering from the bar  (Tom Keith+, Apr 1997) 
GamesGrid: Too many jokers?  (Gregg Cattanach, Sept 2001) 
GridGammon: Are the dice random?  (leobueno+, Sept 2011) 
Jellyfish: How to check the dice  (John Goodwin, May 1998)  [Recommended reading]
Jellyfish: Proof it doesn't cheat  (Gary Wong, July 1998) 
MSN Zone: Security flaw  (happyjuggler0, June 2004) 
Official complaint form  (Gary Wong, June 1998)  [Recommended reading]
Randomness testing  (Brett Meyer+, Dec 2010) 
Safe Harbor Games dice  (Michael Petch+, Aug 2011) 
Synopsis of "cheating" postings  (Ray Karmo, Feb 2002) 
Testing for bias  (Kit Woolsey, Jan 1995) 
The dice sure seem unfair!  (Michael Sullivan, Apr 2004) 
Too many repeated rolls?  (Stephen Turner, Mar 1994) 
Winning and losing streaks  (Daniel Murphy, Mar 1998) 

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