Half a croissant, on a plate, with a sign in front of it saying '50c'

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Three-Dimensional Crossword Puzzle
Like regular puzzle, but with “back” in addition to across and down
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Clues are given for an additional dimension – “back,” or whatever you want to call it. For example, the answer to one across is “cot.” The answer to one down is “cure.” The answer to one back is “custard.” Other words going across and down branch of off that answer. And so on.

It’s hard (for me) to imagine what this looks like – a plastic box, I suppose, with a three-dimensional grid in it. I guess it would probably be better realized with a computer program than a physical embodiment


snarfyguy, Aug 27 2001

Bloxword http://www.bloxword.ca/bloxword.htm
"The web's first 3D crossword" [egnor, Aug 27 2001, last modified Oct 21 2004]

Photo of RSVP http://cgi.ca.ebay....tem&item=1631628170
It's on eBay until Sep 2. Search eBay for RSVP and you should get a photo. [UnaBubba, Aug 27 2001]

3d scrabble http://www.onlinesp...dex.php?session_id=
an online java game [neilp, Mar 19 2005]

[link]






       Baked in 1970 by Selchow & Righter. It was called RSVP, the three-dimensional crossword game.

UnaBubba, Aug 27 2001
  

       How'd it work?

egnor, Aug 28 2001
  

       So thaaaaaaaat's RSVP.

thumbwax, Aug 28 2001
  

       RSVP is a Scrabble variant published by Selchow & Righter (now Hasbro) in 1970.
It is played in an upright grid, into which letters can be placed from either side. A letter placed shows on both sides - but if one reads "BY" on one side of the grid, it reads "YB" on the other. Object is to score more words than your opponent, taking turns placing one letter at a time. We had a set when I was a kid. Each letter tile is a cubic die with a letter on each face, you take 7 cubes and make words as in Scrabble. Extra points for making words on both sides (palindromes like REVIVER were great scorers).

UnaBubba, Aug 28 2001
  

       How about crosswords in 4 dimensions? Letters in the same box would make a word over time (the unit being one day). It would be tricky to do and would require each day's crossword to be linked to previous ones and ones in the future, it would also mean that the layout of black/white squares would have to change more slowly. Eg if "1. (forward in time) a thick, yellow, egg-based dessert (7)" then square 1. would need to be a blank square for the next seven days etc.

stupop, Aug 28 2001
  

       RSVP, huh? Interesting. I imagined the depth dimension would be more pronounced, i.e., to the same degree the two standard dimensions are, so that it would be as deep as it is long and wide. A cube shape would take advantage of the extra dimension in a deeper (sorry) way than merely having letters on both sides of a tile, which, as you point out, is a Scrabble variant, whereas this is a crossword puzzle variant.   

       Perhaps my original description was fuzzy.

snarfyguy, Aug 28 2001
  

       [snarfyguy], you're probably better to do this on a computer. The tiles are too easily obscured in a physical version. It would also be difficult to get them to stay where you put them.

UnaBubba, Aug 28 2001
  

       Roger that, except that I don't know how to do it. But thanks!

snarfyguy, Aug 28 2001
  

       Why couldn't you make a physical version much like a 3-D Connex (sp?) so that as opposed to writing the answer, you drop the letters in?   

       Yes, there are logistical problems, but since when isn't the halfbakery rife with them?   

       BTW; stupop: howabout making it in 4 physical dimensions? A hypercube crossword :) (Look up "MAGIC CUBE 4D" for a fun visualization)

JackandJohn, Feb 10 2003
  

       ah, 3D scrabble (see link).

neilp, Mar 19 2005
  
      
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