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Yes, I believe it is missing a rule. If columns don't need to be identical than this 10x10 puzzle won't have a unique solution: http://i.imgur.com/ZQ8pkfm.png h
by rareEarth 12y ago
Yes, I believe it is missing a rule. If columns don't need to be identical than this 10x10 puzzle won't have a unique solution: http://i.imgur.com/ZQ8pkfm.png http://i.imgur.com/ZQ8pkfm.png
- jtanderson 12y agoI get the same problem with valid solutions that don't match whatever it's comparing as the "right" one. It would be better to instead do a goal test after the final square has been filled? Seems to me this wouldn't be too hard to implement instead of comparing with a key.
- sjoerd_visscher 12y agoNope, there's just one: look at column 1 and 4, so far they are the same.
- timv 12y agoThat's the point. The rules don't explicitly say that columns need to be unique (only rows). Within the stated rules there are (as best I can see) 2 valid solutions to that puzzle. It is the introduction of the unstated unique column rule that resolves it.
- judk 12y agoThe author is not a native English speaker, but it seems obvious that the row rule should apply to columns.