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New operator suggestion: Straights http://www.calcudoku.org/forum/viewtopic.php?f=2&t=705 
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Author:  fnord [ Wed Jun 03, 2015 1:39 am ] 
Post subject:  New operator suggestion: Straights 
There's a number game called Straights (or Str8s) that's not unsimilar to Sudoku. And I thought it might work well as operator in calcdoku puzzles. The concept would be that in a Straightsn cage all numbers are n apart. For 2field cages, that's obviously the same as , but for 3+ fields it's not. So, as an example, in a Straights1 cage 2,3,4 would be valid, but also 7,8,9. In a straights3 cage, 147 would be valid as would be 369 etc. It's a simple concept, but I think it could interact nicely with some typical solving strategies. At the very least, it allows for some number combinations to be simultanously valid that no current operator would allow (see examples above  no operator currently in use would allow both 2,3,4 and 7,8,9 as solution) while at the same time being rather simple to grasp. I've got zero experience actually designing calcdoku puzzles, so it's hard for me to predict how those would impact difficutly and if they add something in practice, but I thought I'd at least throw them out there! 
Author:  pnm [ Wed Jun 03, 2015 9:06 am ] 
Post subject:  Re: New operator suggestion: Straights 
Thanks, very cool suggestion, I'll definitely look at what's involved in implementing this... 
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