Unanswered Questions

Here is a theoretical question - one that doesn't afford an easy answer in any case, not even the trivial one. In Conway's Game of Life, there exist constructs such as the metapixel which allow the ...

In the game of Freecell, you are tasked with building four foundation piles in suit from ace to king, on a layout where you build downward in alternating colours. However, you can only build one card ...

Over at our friends at [Puzzling.SE], the following puzzle was posted: Is this chromatic puzzle always solvable? by Edgar G. You can play it here. Puzzle explanation Given a m x n grid with tiles of ...

Challenge You will be given a table as input, drawn with ASCII | and _. Your task is to set the chairs around it. Example Input: ____ | | | | | | | | |____| Output: _^_^_ < ...

In my Economics class, my friends and I like to come up with ways to rearrange the digits in the date (in MM/DD/YY) format to create a valid mathematical equation. For the most part, we are allowed to ...

This challenge is about writing code to solve the following problem. Given two strings A and B, your code should output the start and end indices of a substring of A with the following properties. ...

Write a function or program that outputs Quater-imaginary base displayed as binary digits. The number base is 2i, where i is the square root of -1. See Complex Number for more details on i. Each digit ...

Alphys, the Underground's Royal Scientist, has finished a prototype for a new puzzle. However, she can't seem to find anyone willing to test it. The rules of her puzzle are as follows: The goal is ...

For mostly historical reasons, bash is quite a hodge-podge of syntax and programming paradigms - this can make it awkward and sometimes frustrating to golf in. However it does have a few tricks up ...

Magic: the Gathering is a trading card game where, among other things, players play cards representing creatures, which can then attack the other player, or defend against the other player's attacks ...

There is a network of upto 26 nodes (named A to Z or a to z as per your wish). Every pair of nodes may be connected or disconnected. A node may be connected to atmost 4 other nodes. Your task is to ...

This question was inspired this question and @orlp's comment and a lot of the explanation was copied from there. Write a GOLF assembly program that given two arbitrary size decimal integers a, and b ...

Your task is to play the roles of both characters in this scene from Inception. In it, Cobb gives Ariadne a challenge: You have two minutes to design a maze that takes one minute to solve. Some ...

In Chess, it's possible for the game to end after 4 moves (2 each) with a Fool's Mate. Your goal is to find the Fool's Mate of Halma: the 2-player game of Halma that minimises the number of turns ...

Challenge: Given a Sudoku board on standard input, find the minimum number of numbers added to make the board unique. Specifics/Rules: The input is formatted as follows (all whitespace is ...