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Dice rolling apps

Posted By: eXtreme Gammon
Date: Thursday, 9 December 2010, at 6:16 p.m.

In Response To: Dice rolling apps (Tom Keith)

The process can be done pretty easily and securly:

each player pick a large prime number (p1 and p2)

the RNG is initialiazed with a seed s=p1*p2

once the game is finsihed the seed s if made avaliable to both player

each player can divide the s by their number and verify the result is a integer

This way the other player does not need to know the other's number (picking large prime make it extremely difficult to get both number without knowing one of them)

If people are okay to change their number each time, then there is no reason to secrecy and each can pick any number.

As for RNG, 99% of them will pass test sufficient for pratical backgammon games. Mersenne Twister ( http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html ) is a well known and easy one to implement (for XG owner you can find its source in the dice library folder c:\program file\extreme gammon\dice dll\MT19937.c)

Messages In This Thread

• Why I LIKE the Meyer Dice Tube
  Colin Owen -- Tuesday, 7 December 2010, at 6:46 p.m.
  • Why I LIKE the Meyer Dice Tube
    Stick -- Tuesday, 7 December 2010, at 7:01 p.m.
    • Why I LIKE the Meyer Dice Tube
      Timothy Chow -- Tuesday, 7 December 2010, at 10:06 p.m.
      • Why I LIKE the Meyer Dice Tube
        Stick -- Tuesday, 7 December 2010, at 10:11 p.m.
      • Why I LIKE the Meyer Dice Tube
        Rich Munitz -- Wednesday, 8 December 2010, at 4:17 a.m.
        • Dice rolling apps
          Tom Keith -- Thursday, 9 December 2010, at 4:31 p.m.
          • Dice rolling apps
            Bob Koca -- Thursday, 9 December 2010, at 5:10 p.m.
            • Dice rolling apps
              Chuck Bower -- Thursday, 9 December 2010, at 5:27 p.m.
              • Dice rolling apps
                Bob Koca -- Thursday, 9 December 2010, at 7:53 p.m.
          • Dice rolling apps
            eXtreme Gammon -- Thursday, 9 December 2010, at 6:16 p.m.
            • Dice rolling apps
              Timothy Chow -- Thursday, 9 December 2010, at 6:23 p.m.
              • Dice rolling apps
                eXtreme Gammon -- Thursday, 9 December 2010, at 7:17 p.m.
                • Dice rolling apps
                  Maik Stiebler -- Thursday, 9 December 2010, at 10:31 p.m.
            • Dice rolling apps
              Chuck Bower -- Thursday, 9 December 2010, at 6:27 p.m.
          • My favorite dice rolling app....
            neilkaz -- Thursday, 9 December 2010, at 8:02 p.m.
            • My favorite dice rolling app....
              Tom Keith -- Thursday, 9 December 2010, at 9:13 p.m.