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Retrograde backgammon puzzle

Posted By: Timothy Chow
Date: Tuesday, 26 February 2013, at 1:19 a.m.

In Response To: Retrograde backgammon puzzle (Bob Koca)

Bob Koca asked:

Any Others?

See problem 10 in Chris Bray's 2009 quiz. It contains what I consider an aesthetic flaw, though: Strictly speaking, it is not possible to deduce what the last roll was by pure logic.

Messages In This Thread

• Retrograde backgammon puzzle
  Timothy Chow -- Sunday, 24 February 2013, at 8:22 p.m.
  • Retrograde backgammon puzzle
    Smcrtorchs -- Sunday, 24 February 2013, at 11:20 p.m.
  • Retrograde backgammon puzzle
    benf -- Monday, 25 February 2013, at 12:56 a.m.
    • Retrograde backgammon puzzle
      Bob Koca -- Monday, 25 February 2013, at 5:27 p.m.
      • Retrograde backgammon puzzle
        6stones -- Monday, 25 February 2013, at 7:25 p.m.
        • Retrograde backgammon puzzle
          6stones -- Monday, 25 February 2013, at 10:29 p.m.
      • Retrograde backgammon puzzle
        Timothy Chow -- Tuesday, 26 February 2013, at 1:19 a.m.
        • Retrograde backgammon puzzle
          Matt Cohn-Geier -- Tuesday, 26 February 2013, at 4:41 a.m.
          • Retrograde backgammon puzzle
            Timothy Chow -- Tuesday, 26 February 2013, at 6:01 p.m.
            • Retrograde backgammon puzzle
              Bob Koca -- Tuesday, 26 February 2013, at 6:32 p.m.
    • Retrograde backgammon puzzle
      Timothy Chow -- Tuesday, 26 February 2013, at 1:10 a.m.
  • Retrograde backgammon puzzle
    playBunny -- Saturday, 2 March 2013, at 9:52 p.m.