Specifically this one.

Dennis pointed out that the rule that input cannot be an array of lines makes the challenge worse, and I agree with him now. However, the challenge already has several answers, and most of them would become sub-optimal since taking input as a string array would likely be shorter in most cases. Note that no answer would become invalid.

Should I improve the rules of a challenge, even if it already has many answers?

Note: This isn't a duplicate of When should rule changes count? as that post is concerned with can you change the rules, vs this one which is concerned with should you.

  • \$\begingroup\$ Related \$\endgroup\$
    – user45941
    Nov 9, 2017 at 14:12
  • 3
    \$\begingroup\$ @NathanMerrill I disagree, that question is much more of a can you change the rules, this question assumes you can change the rules and asks when they should, not everything you can do you should do. \$\endgroup\$
    – Wheat Wizard Mod
    Nov 9, 2017 at 19:48
  • 1
    \$\begingroup\$ @WheatWizard The top answer addresses not only the question of whether or not rules can be changed, but also addresses whether or not those rule changes that could be viewed as acceptable should be applied. \$\endgroup\$
    – user45941
    Nov 14, 2017 at 18:25

2 Answers 2


If you do, make it clear in the question body that the rules disallowed that form of input originally. However, with many existing answers, I don't think any changes to the rules should be made even if they improve the challenge, unless there is something seriously wrong with the rules.

Likely many of those who have already answered are not going to update their answers per the new rules, nor should it be expected from them. This could lead to the already upvoted now-sub-optimal answers being followed by similar but more optimal answers that get buried on the second page. And otherwise, if the new answers get more upvotes than the old, it's somewhat unfair towards the original answerers who might have written the same answer if it was allowed when they answered.


Here's my thoughts

First and foremost as mentioned you should try to avoid invalidating any existing answers. I know you were intending not to, but I think it is worth mentioning in case other people have a similar situation in the future.

Now that that's out of the way, the main question I would like to ask is

What are the drawbacks to making the change?

The one you mention in the post is that previously competitive answers will become less competitive as new methods become available.

I think the main reason you consider this a drawback in your post (if this is wrong tell me, I don't want to put words in anyone's mouth), that the time spent optimizing the input portions of answers will go to waste. That because a new method is available to make shorter answers the time spent on them is false.

Now while this is a reasonable I think it is missing the point, there are two main things most people get out of golfing

  • Golfing is inherently fun and doing so is enjoyable.

  • Posting short answers gets you upvotes which get you reputation, which we all like.

  • People like competition, in particular winning them.

As far as the first one goes, a rule change can never go back in time and remove the fun you had, so no harm there. And for the second one I seriously doubt people will retract their upvotes because the rules made the solution less optimal. So on both fronts there it seems like the change has little effect.

The third is a little bit of a mixed bag. On one hand some of the most fun competitions I've had were ones where it looked like it was over but some new information provided a surge to get even better scores, and this could be that new information. But it could also be a bit frustrating having just won a competition to have to rules changed and have to defend your title. In this case it might be a FGITW to port answers to new paradigms. I would hope there wouldn't be any disingenuous behavior, but even with everyone acting fairly there might be a clear answer in a particular language and the first person to notice the change in the question gets the prize so to speak.

Now the next question to ask is

What do we gain from changing the challenge?

Now this one is pretty challenge specific as different changes might have different improvements, but the two main things I would be concerned about, are

  • It makes it more fun for people who answer in the future.

  • It might make more people able or willing to compete.

  • It sets a good example for future challenges.

I think all of these are pretty decent reasons to make the change, but you will have to weight them on a challenge by challenge basis.

Overall I'm not sure if I have an answer as to what you should do in every case, just some things to consider when making a choice.

  • 3
    \$\begingroup\$ As far as "A rule change can never go back in time and remove the fun you had": This is true only if there's only 1 rule change. If there are multiple rule changes on a single post, or rule changes are common, then the fun you have golfing is definitely tainted by the thought of "These golfing efforts may be going to waste". \$\endgroup\$ Nov 9, 2017 at 21:36

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .