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Ripple Arrows rules

published by sstackho on Wed, 05/19/2021 - 23:20
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Player's feedback

Hi. I am not understanding the rules for the Ripple Arrows puzzle. Specifically "An arrow in a black cell points to a number that is exactly its own value (in cells) away from that black cell in one of the eight standard directions. Absence of an arrow means there are no such numbers in that direction. An arrow may point to more than one such number."

1. Re: "points to a number". Is the "number" the first digit encountered in the pointed direction? Does the digit need to be in the first cell in the pointed direction? Or does that refer to any of the numbers in the path of the arrow?

2. Re: "Absence of an arrow means there are no such numbers in that direction." Probably better for me to wait to a clarification of the previous question before I ask any more questions.

Thanks.

Submitted by rob on Thu, 05/20/2021 - 15:17.

Question 1: It doesn't need to be the first number. See e.g. the 2 in the bottom left corner of the example, which matches the leftward arrow in the bottom row, despite a 3 in cell 2.

Submitted by sstackho on Thu, 05/20/2021 - 17:54.

Thanks.

Re: "Absence of an arrow means there are no such numbers in that direction." I can't figure out what this means.

e.g. The black cell in R3C6 has no arrow pointing down. Since there is a 2 in R4C6, I thought that this would mean that there should NOT be a 2 in any cell that is two away from R3R6 (in any of the 8 directions), but R3C4 is a 2.

I'm obviously misunderstanding this, but I can't figure out what the instruction means.

Submitted by Kithyane on Fri, 05/21/2021 - 07:46.

If I understand correctly, in this example no arrow pointing down in R3C6 means :
- R4C6 is not a 1
- R5C6 is not a 2
- R6C6 in not a 3
All eight directions are independent.

Submitted by sstackho on Fri, 05/21/2021 - 16:04.

"All eight directions are independent."

Thank you - that was the part I was misinterpreting. I was thrown off by the "in one of the eight standard directions" wording in the rules description. I was making it more complicated than it needed to be.