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Friday, October 23, 2009

Eternity II, Part 2


I was thinking about this puzzle the other day ($2 million in prize money is kind of attention getting), and I got to wondering how many different colors/edge patterns you would need in order for all pieces to be different. (The pieces are all square tiles, each edge can be a different color/pattern.) If you have only one color, then there is only one possible pattern: all pieces would be the same. If you used two colors, you could have 16 possible patterns (16 = 2 x 2 x 2 x 2), but rotating pieces will show that some are duplicates of each other. After that it gets complicated, so I wrote a little program to count up the possible patterns and eliminate all the duplicates. The results are in the "picture".

I am thinking there has to be a better way to calculate the number of unique pieces, but I'll be durned if I know what it is. I'll bet Stu knows, or maybe Jack.

Update January 2017 replaced missing image.

5 comments:

  1. No, I (Stu) don't know that.

    However, I DO know that there is some actually useful SW available which would do that as a by-product.

    When East Germany collapsed, the Stasi fed lots of their secret documents through a shredder. Said SW sorts through these millions of shreded pieces, matches edges & reconstructs the documents a page at a time.

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  2. i have lost pieces 20,29 40 can anyone help me please

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  3. please where can I get pieces 20,29,40 of the game urgent even if it is a web image

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  4. Sorry, I don't have a copy of the puzzle. I have just been using randomly generated puzzles.

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  5. Still 31 days to win the $ 2 000 000 prize.
    You can try this solver for more chances :
    http://eternity2blogger.over-blog.com/

    Best Regards,
    Eternity II Blogger

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