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70% cube efficiency

Posted By: Chuck Bower
Date: Wednesday, 5 January 2011, at 3:52 p.m.

In Response To: Cube Decision (Matt Cohn-Geier)

I have no idea how this 70% thing works, but I guess my first question would be is it accurate and if so in what situations is it not so accurate.

Basically this is how it works:

1) Find the takepoint assuming the cube will NEVER be used again. (Some call this the "dead-cube-takepoint". I prefer the "buried-cube-takepoint", as in "bury your money in the back yard..." to distinguish it from positions where the cube is really worthless to the owner.)

2) Find the takepoint assuming the next cubeturn will occur EXACTLY at the opponent's drop/take line (where there is no equity gain/loss by taking or dropping). ("Perfect takepoint" or "100% efficient takepoint".)

3) Go 70% of the way from 1 to 2. Sometimes called the "realistic takepoint".

This method is good at early scores, but at late scores, adjustments need to be made. I've seen >75% and <50%. And it's not uniformly dependent upon who has the lead! Not surprisingly, killing of gammons has a big effect. I don't know if others (John and UBK are candidates) have studied the effect at late scores, but AFAIK it's m/l unexplored territory.

Messages In This Thread

• Cube Decision
  David Startin -- Saturday, 1 January 2011, at 5:16 p.m.
  • Cube Decision
    Timothy Chow -- Saturday, 1 January 2011, at 7:47 p.m.
    • Cube Decision
      stw672 -- Saturday, 1 January 2011, at 9:20 p.m.
      • Cube Decision
        Timothy Chow -- Saturday, 1 January 2011, at 11:18 p.m.
        • Cube Decision
          David Startin -- Sunday, 2 January 2011, at 1:27 a.m.
          • Cube Decision
            Sam Pottle -- Sunday, 2 January 2011, at 2:35 a.m.
            • Rollout
              David Startin -- Monday, 3 January 2011, at 12:59 a.m.
          • Cube Decision
            Timothy Chow -- Sunday, 2 January 2011, at 3:02 a.m.
          • Cube Decision
            Bob Koca -- Sunday, 2 January 2011, at 6:00 a.m.
  • Cube Decision
    Sam Pottle -- Saturday, 1 January 2011, at 9:51 p.m.
  • Cube Decision
    Stick -- Sunday, 2 January 2011, at 6:06 a.m.
    • Cube Decision
      Timothy Chow -- Monday, 3 January 2011, at 1:24 a.m.
      • Cube Decision
        Sam Pottle -- Monday, 3 January 2011, at 3:58 a.m.
        • Cube Decision
          Timothy Chow -- Monday, 3 January 2011, at 4:56 p.m.
          • Cube Decision
            Chuck Bower -- Wednesday, 5 January 2011, at 2:22 a.m.
            • Cube Decision
              Matt Cohn-Geier -- Wednesday, 5 January 2011, at 11:56 a.m.
              • 70% cube efficiency
                Chuck Bower -- Wednesday, 5 January 2011, at 3:52 p.m.