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Too good to double when a gammon is impossible?!

Posted By: Timothy Chow
Date: Friday, 21 August 2009, at 11:11 p.m.

Apparently this is a known bug in gnubg, but this was my first encounter with it. In the position below, 3-ply or 4-ply evaluations allow White to take. A 0-ply rollout assigns an equity of well over +1.000 to "no double"; of course this is nonsense. I'm told this has something to do with egregiously bad takes during gnubg's rollout. But surely this is a bug that should be fixed? (I've raised the issue on the bug-gnubg list already.)

Money Game
Blue on roll. Cube action?

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Position Id: bgAAULZtEwAiAA Match Id: UQkAAAAAAAAA

Messages In This Thread

• Too good to double when a gammon is impossible?!
  Timothy Chow -- Friday, 21 August 2009, at 11:11 p.m.
  • Too good to double when a gammon is impossible?!
    Bob Koca -- Friday, 21 August 2009, at 11:22 p.m.
    • Too good to double when a gammon is impossible?!
      Timothy Chow -- Saturday, 22 August 2009, at 2:45 a.m.
      • Too good to double when a gammon is impossible?!
        garyo -- Saturday, 22 August 2009, at 3:56 p.m.
        • Too good to double when a gammon is impossible?!
          Bob Koca -- Saturday, 22 August 2009, at 4:11 p.m.
          • Too good to double when a gammon is impossible?!
            Timothy Chow -- Saturday, 22 August 2009, at 7:08 p.m.
            • Too good to double when a gammon is impossible?!
              Bob Koca -- Monday, 24 August 2009, at 4:53 p.m.