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A sandbox is a place where you can post proposed challenges for others to review.

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Sandbox for Proposed Challenges

Infinite ordinals from a well-ordering
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0 votes

Sandbox for Proposed Challenges

Kolmogorov-simple numbers
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1 vote

Sandbox for Proposed Challenges

The Most Wanted Prime Numbers
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2 votes

Sandbox for Proposed Challenges

Solve nonimplication-SAT
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3 votes

Sandbox for Proposed Challenges

Will the tower balance? You are given as input a tower made of bars of unit height, and your task is to decide if the tower is stable. Here is an ascii art drawing of a tower: # #### # #### ##### Fo …
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2 votes

Sandbox for Proposed Challenges

Compress and decompress
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2 votes

Sandbox for Proposed Challenges

Crack the Caesar cipher
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3 votes

Sandbox for Proposed Challenges

Recursive palindromes
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2 votes

Sandbox for Proposed Challenges

Trap the hero in a maze
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3 votes

Sandbox for Proposed Challenges

Only one from each set
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1 vote

Sandbox for Proposed Challenges

Play chess (KOTH) Your task is to write a chess engine that will compete with other submissions in a chess tournament. Well, almost. Since writing a full engine can be a bit tedious, you only need to …
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1 vote

Sandbox for Proposed Challenges

Count the ways to transform (2) Your input is a matrix (2d array) of positive integers. For example: \begin{matrix} 1 & 1 & 4 & 7\\ 1 & 3 & 5 & 6\\ 2 & 1 & 4 & 5 \\ \end{matrix} A semi-continuous tran …
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0 votes

Sandbox for Proposed Challenges

Count the ways to transform (3) Your input is an infinite matrix (2d array) of nonneagtive integers where a finite area of the matrix contains nonzero integers. For example: \begin{matrix} \ddots & \v …
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1 vote

Sandbox for Proposed Challenges

Trap the persistent hero in a maze Last time a challenger tried to thwart your evil magical deeds, they got trapped in a maze that you created to be as small as possible, giving up only a few steps fr …
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2 votes

Sandbox for Proposed Challenges

Ragged list addition Let's define the operator \$+\$ as follows, using wrapping list indexing: \$ a+b=\begin{cases} a+b,\space\text{if }a\text{ and }b\text{ are integers (regular integer addition)}\\ …
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