@AdmBorkBork The shortest uncrackedA is the winner, so augmenting the length can make the answer more competitive if it makes it more difficult to crack.
@ETHproductions Yeah, I really like that one. That weird analogy was the only thing that allowed me to crack the problem, and I think it makes it a good candidate for both categories.
@ConorO'Brien Timeouts are the last resort with which moderators can attempt to keep a room under control. You don't place clown masks on the riot police, and you don't crack jokes in a timeout message.
@RohanJhunjhunwala Strongly advising means squat. If the score or the validity of a crack depends on it, it must be clarified. The meta consensus is that every challenge has to define it itself.
@RohanJhunjhunwala They must not be derived from another language (brainfuck versus Alphfuck) is a bit unclear. Does that mean I can crack a brainfuck answer with Sesos? Probably not...
M, 10 bytes, score 0.6 (6 / 10) [cracked]
R‘ạḤc’*@RP
A tad cheaty since M and Jelly are quite similar, but allowed by the rules. This version is based on @LeakyNun's crack to my Jelly answer.
This calculates sequence A068943. Try it online!
Intended solution
The following code works in M/Je...
What are you trying to prevent? Leaky Nun found a 10 byte crack to my 11 byte submission, but I can go lower. What harm would come from posting a shorter Jelly answer so the robbers could try again to outgolf me?
@Sherlock9 In code golf, unless you're going for FGITW in a trivial challenge, time is usually not an issue. In cops and robbers, specifically in the robbers' challenge, you have to be the first one to post a crack or it doesn't count. More than once, I cracked a solution, just to find another answer pop up while I wrote mine. Also, there's a deadline, which lead to this.
@isaacg I had a feeling you would crack that one. :P Btw, ljyG finishes in under 50 seconds on my machine, while lsyG is very slow. Even lsy<G18 takes over 6 minutes. What would be the reason for that?
@BetaDecay I'm not sure if I'll keep trying to crack submissions. nimi's pretty much wore me out and I'm pretty PO'd that I tried the correct language but failed to append a newline...
I want to kick myself! I've spent hours trying to crack nimi's answer, searched the entire internet for a working compiler/interpreter, and it turned out to be bc.
@MartinBüttner OK, thanks. What about different versions of the same language? For example, would the FORTRAN crack be valid without specifying 77? Could I write something that works only in Ruby 1.9?
@BetaDecay I think you should close your robbers' challenge 3 days after the cops' challenge. Otherwise, there's no incentive to crack the last valid submission.
I like the way I handled this for my CnR: If a cop submission relies on implementation-defined or undefined behavior, you only have to find a crack that works (verifiably) on your machine.
M, 9 bytes, score 0.6667 (6 / 9)
r©0+’Ac®Ḅ
A tad cheaty since M and Jelly are quite similar, but allowed by the rules. @miles' crack to my Jelly answer doesn't work in M; it lacks the œċ atom.
This calculates sequence A119259. Try it online!
