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Normal sudoku rules apply. Adjacent digits along a green whisper line must differ by at least 5. Cells on a purple renban form a consecutive sequence (not necessarily in order). Digits in cells connected by an X sum to 10. Digits in cells connected by a white dot are consecutive. Digits in cells connected by a black dot are in the ratio 2:1. Not all dots or Xs are given.
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At this point, you can also discuss what all of the location clues have led you to.

For the answer, take the first 5 characters from each of the four previous solution codes at concatenate them. Going that tinyURL address (https://tinyurl.com/XXX) is the answer.