Oh wow! I just came across the idea because I wanted to try the opposite of distinctness in a calcudoku. I could go for maximum repeats, but I have a few other ideas to try soon as well. One is consecutiveness, where cages contain consecutive numbers. Another is isolatedness where numbers cannot be consecutive at all!
Here's a larger variation of this non-distinct condition below I just came up with. Thanks for the info!
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In this puzzle, each row and each column contains the numbers 1 through 6 exactly once, but NO cage is allowed to contain all distinct numbers! Clues when given must equal the sum of the entries in that cage.
Solution and more info at:
https://quadratablog.blogspot.com/2021/ ... uzzle.html