Random Move 2x2 Scrambling A simple way to scramble a 2x2x2 Rubik's cube is to make a sequence random moves. This is not how official scrambles are done, but can get pretty close to a uniform distribution of scramble states. Due to the way a 2x2 only has two layers, doing one turn on one face is "...

[Draft] 2x2 algorithm with half the faces A fun fact about the 2x2x2 Rubik's cube is that due to the way a 2x2 only has two layers, doing one turn on one face is indistinguishable from doing the same direction turn on the opposite face and then rotating the cube. So algorithms, that is sequences ...

Drawing the Stack Overflow logo I thought of making this a monthly game. You will be using C as the language for this code golf challenge. The goal is to create the Stack Overflow logo using ASCII characters. It looks like this. Can you get it with the least bytes possible? Tags: code-golf, asc...

Print the Najdorf Sicilian The Najdorf Variation of the Sicilian Defence is an opening often played at the highest level of chess. It is named after GM Miguel Najdorf known for being extremely sharp and theory heavy. Your task is to write a program that, given a Boolean-like input, prints a chess...

Story The god of base is opening heaven’s gate for mortals to join the base party. You, as one of the believer, wants to follow his step to ascend to heaven. But not everyone can get in. The god posts this question to let you prove you are worthy of his party. Task You will get 2 inputs First be...

The Smallest Grammar Problem Here is a write-up for the main site. Some changes I want to add are: You can use any language. You must formally prove the Big-O of the worst case of your algorithm in your answer. You must formally prove the correctness of your algorithm as well. As far as runnin...

You want to see how quickly the ratio of two consecutive Fibonacci numbers converges on φ. Phi, known by the nickname "the golden ratio" and written as \$φ\$, is an irrational number, almost as popular as π and e. The exact value of \$φ\$ is \$\frac {1 + \sqrt 5} 2 = 1.618...\$ The Fibonacci sequ...

Unlock Tim Cook’s iPhone This is Tim Cook, CEO of Apple. Your challenge is to write a program to output a picture that will be recognized as the same person by a facial recognition model. (Photo attribution) Test your picture using the face_recognition package—we’ll use the current version as of...

Your job is to write a program that takes a number N as input and outputs all 2-by-N mazes that are solvable. Output format can be in the form of any two distinct values representing wall and empty - I use x and . here but you can use anything. You can have a matrix, array, string, ascii art, wha...