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Puzzle

Posted By: Timothy Chow
Date: Monday, 30 August 2010, at 4:25 p.m.

In Response To: Puzzle (Tom Keith)

One thing that needs to be clarified is whether the players can be assumed to play "obviously correct" moves. I recall asking about this once and being told that the race is considered gin even if the winning player could lose by making legal (but obviously very "stupid") moves. In your example, 10 checkers on the ace point and 5 checkers on the deuce point cannot lose a backgammon unless the player rolls snake eyes and "stupidly" plays 2/1(4).

Anyway, there are other examples. White could have 13 checkers on the 1 point and one checker each on the 3 and 5 points, with Black having two or more checkers on each of White's 2 and 4 points. The only way White will not be forced to bear a checker immediately is by rolling 42 and playing it 5/1 3/1, breaking contact.

Messages In This Thread

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    Jason Lee -- Sunday, 29 August 2010, at 9:34 a.m.
    • Penalty For Running Out Of Time
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      • Penalty For Running Out Of Time
        Bob Koca -- Sunday, 29 August 2010, at 1:45 p.m.
        • Penalty For Running Out Of Time
          Paul Weaver -- Sunday, 29 August 2010, at 2:02 p.m.
          • Penalty For Running Out Of Time
            Havard Raddum -- Monday, 30 August 2010, at 11:30 a.m.
            • Puzzle
              Tom Keith -- Monday, 30 August 2010, at 2:20 p.m.
              • Puzzle
                Casper van der Tak -- Monday, 30 August 2010, at 2:24 p.m.
                • Puzzle
                  Tom Keith -- Monday, 30 August 2010, at 5:54 p.m.
              • Puzzle
                Timothy Chow -- Monday, 30 August 2010, at 4:25 p.m.
                • Puzzle
                  Bob Koca -- Monday, 30 August 2010, at 5:03 p.m.
                  • Puzzle
                    Timothy Chow -- Monday, 30 August 2010, at 8:15 p.m.
                    • Puzzle
                      Bob Koca -- Monday, 30 August 2010, at 8:22 p.m.
                    • Puzzle
                      Bob Koca -- Tuesday, 31 August 2010, at 4:29 p.m.
                      • Clever! *NM*
                        Timothy Chow -- Wednesday, 1 September 2010, at 8:28 p.m.
                • Puzzle
                  Tom Keith -- Monday, 30 August 2010, at 5:48 p.m.
              • Puzzle
                Bob Koca -- Monday, 30 August 2010, at 4:59 p.m.
                • Puzzle
                  Tom Keith -- Monday, 30 August 2010, at 5:50 p.m.
      • Penalty For Running Out Of Time
        Keene -- Monday, 30 August 2010, at 5:05 p.m.
  • My First Ever Heads-Up Money Session With A CLOCK!
    Sam Pottle -- Sunday, 29 August 2010, at 1:24 p.m.
  • My First Ever Heads-Up Money Session With A CLOCK!
    KenB -- Sunday, 29 August 2010, at 2:48 p.m.
  • My First Ever Heads-Up Money Session With A CLOCK!
    christian munk-christensen -- Sunday, 29 August 2010, at 4:52 p.m.
    • Answering Christian
      Paul Weaver -- Sunday, 29 August 2010, at 7:24 p.m.
      • Answering Christian
        joe freedman -- Wednesday, 1 September 2010, at 3:56 a.m.
  • My First Ever Heads-Up Money Session With A CLOCK!
    phil simborg -- Sunday, 29 August 2010, at 6:01 p.m.
    • Answering Phil's Questions
      Paul Weaver -- Sunday, 29 August 2010, at 7:37 p.m.
  • My First Ever Heads-Up Money Session With A CLOCK!
    Joe Russell -- Monday, 30 August 2010, at 6:09 p.m.
    • My First Ever Heads-Up Money Session With A CLOCK!
      mamabear -- Wednesday, 1 September 2010, at 2:15 p.m.
  • Orwell
    joe freedman -- Wednesday, 1 September 2010, at 4:00 a.m.