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57 votes

Will it halt? (Cops)

Malbolge, 128 bytes, cracked by KBRON111 ...
Doorknob's user avatar
  • 71.5k
56 votes

The Programming Language Quiz, Mark II - Cops

Beatnik, 114 bytes, cracked by Johannes Griebler Mit' tää kauniina kelaa? Mil tää öisin pelaa? Sun suu kauniina sanoo: Kroohhpyyh-ZZZ-ZZZZ Z Nukuttaapi kovin! It'...
fergusq's user avatar
  • 5,127
52 votes

Will it halt? (Robbers)

Malbolge, Doorknob Try it online (Thanks Dennis!) Input for Windows: F_⌠1234567890 Input on Linux based system using ISO-8559-1: ...
KBRON111's user avatar
  • 581
49 votes

Print X without X (robber's thread)

Python 3, cracks @nthistle's answer ...
Luis Mendo's user avatar
  • 104k
37 votes
Accepted

Can you outgolf me? (Cops section)

Seed, 5861 bytes, score = 5012 / 5861 = 0.85 The sequence is primes (A000040) with offset 1. a(1) = 2, a(2) = 3, a(3) = 5 etc. ...
feersum's user avatar
  • 31.4k
35 votes

Print X without X (cop's thread)

Python 3, Score: 81, Cracked X = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'*,./:;<=>?@[]^_`{|}~ Not terribly interesting since it ...
nthistle's user avatar
  • 1,311
29 votes

Peel away the layers - Cops

840,527,321,220,386 layers, safe ...
Dingus's user avatar
  • 11.2k
27 votes

Can you outgolf me? (Cops section)

Jelly, 5 bytes, score 0.8 (4 / 5) [cracked!] R²Sƽ Computes A127721. Try it online! Here's the solution: RÆḊḞ implicitly ...
George V. Williams's user avatar
27 votes

Output two numbers (Cops' thread)

Zsh, 1 byte, score 124, provably uncrackable Programs output via exit code. / Outputs 126 ("permission denied"). Attempt This Online! [ Outputs 2 ("invalid argument"). Attempt This ...
pxeger's user avatar
  • 23.7k
26 votes

The Programming Language Quiz, Mark II - Cops

8086 DOS COM, 58 bytes, cracked by tsh huCX5DBP^h~0_GG1<h32X542P[18F18h42X%AAP[h!.X%OOS`M a@<euws I/O format: raw characters Explanation The basic ...
Maya's user avatar
  • 5,683
26 votes

The Programming Language Quiz, Mark II - Cops

Hexagony, 62 bytes, cracked by totallyhuman i=100 while(i>0){p(100-i+"d")!}i=%<>--1;if(_@==0){_@=-100}end; Prints decimals separated by a single ...
Adyrem's user avatar
  • 571
24 votes

Will it halt? (Cops)

JavaScript (ES6), 17 bytes, Cracked x=>{for(;x==x;);} On TIO, since I dunno how to do Node.js readline on TIO, just stick the input in the function call. This ...
Stephen's user avatar
  • 13.8k
24 votes

What's the Missing Code? (Robbers)

Python 3, cracks Sisyphus' answer print(dⅳmod(99,15)) Try it online! Inserts dⅳmod where the ...
xnor's user avatar
  • 145k
22 votes

Make your language *mostly* unusable (Robber's thread)

C (GCC/Linux) by Sisyphus This snippet closes the provided function and starts a new one (classic code injection), which itself redefines close so that instead of ...
2012rcampion's user avatar
  • 1,344
21 votes

Hidden Inversions (Robbers' Thread)

Python 3, 46 bytes, Lynn lambda x0223334566789:(x0223334566789*89)//178
G B's user avatar
  • 21.9k
21 votes

Make your language *mostly* unusable! (Cops' thread)

Haskell, cracked by Christian Sievers import Prelude(getLine,print) a=a Full program, reading two integers (including negative ones) from stdin and writing to ...
Ben's user avatar
  • 381
21 votes

Make your language *mostly* unusable (Robber's thread)

Python, Wheat Wizard's solution here ...
hyper-neutrino's user avatar
  • 42.4k
21 votes

The Programming Language Quiz, Mark II - Robbers

Game save of the Powder Toy, posted by moonheart08 xxd dump: ...
tsh's user avatar
  • 34.7k
21 votes

Cops: The Hidden OEIS Substring

MATL, sequence A005206. Cracked by SamYonnou voOdoO Try it online! The hidden string has 8 bytes.
Luis Mendo's user avatar
  • 104k
20 votes

The Programming Language Quiz, Mark II - Cops

???, 1167 bytes, cracked by Dennis ...
Riker's user avatar
  • 7,840
20 votes
Accepted

The Programming Language Quiz, Mark II - Cops

Sesos, 6 bytes, safe }%*xg2 Output is in decimal. Try it online! Sesos can be written in either binary or assembly format. The assembly file that generated the ...
Dennis's user avatar
  • 210k
19 votes

The Programming Language Quiz, Mark II - Cops

Whitespace, 369 bytes, cracked by Adyrem ...
Jo King's user avatar
  • 47.2k
19 votes

Guess my password (robbers' thread)

Sisyphus, PHP Password: A string golf with 1,000,000 leading whitespaces and 1,000,000 trailing whitespaces Output: golf Reason: ...
Benkerd22's user avatar
  • 291
18 votes

Significant Whitespace: Cops

Haskell, 100 bytes, cracked by nimi main=interact$iddoidlinesidwordsdoidoidoid=doiddoid<-dooiidoid<-dooiddoiddodoid This is a full program and a dadaistic ...
Laikoni's user avatar
  • 26.2k
18 votes

Cops - square times square root

Python 3, 44 bytes (cracked) '**:(((paraboloid / rabid,mad,immoral))):**' No rounding. Floating point accuracy.
Kyle G's user avatar
  • 870
18 votes

Make your language *mostly* unusable! (Cops' thread)

Python 2, Cracked Implements addition as a named function ...
Wheat Wizard's user avatar
  • 98.7k
18 votes

The Programming Language Quiz, Mark II - Cops

ETA, 83 bytes, safe n = "e"; is n equh one hundre- SNACK?! 0v0 _ M-< / \_/ HA|E SNAKE!!! >:( T Another one that's more ASCII art than code (though ...
Jo King's user avatar
  • 47.2k
18 votes

The Programming Language Quiz, Mark II - Cops

MATL, 46 bytes, cracked by totallyhuman Flatten[{1,100}] (* From x: 1 To 100: huhu% *) I had fun trying to make this look somewhat like Mathematica, and trying ...
Stewie Griffin's user avatar
18 votes

Print X without X (robber's thread)

Python 3.7, 128 bytes, cracks jez's answer ...
The Fifth Marshal's user avatar
17 votes

The Programming Language Quiz, Mark II - Cops

Curry PAKCS, 57 bytes, cracked by Potato44 f[]="" f([x]++s)=show x++" "++f s main=putStr(f[1..100]) Looks like Haskell but it doesn't run in Haskell.
Wheat Wizard's user avatar
  • 98.7k

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