Questions tagged [grid]
For challenges involving a grid.
390 questions
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Sum of Neighbours in a 2D Grid
This is the 2D version of Sum of neighbours: Given a 2D grid of integers, output a grid of the same size where each cell contains the sum of the values of its orthogonal and diagonal neighbors (up to ...
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Make the Stars Shine
We've been given a map of the night sky. The map features three single characters, to match the theme, I'll refer to them O, X ...
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Solve Star Battle (Queens) Puzzle
Queens is a puzzle that consists of a NxN grid divided into continuous color regions.
Your goal is to have exactly one queen (Q) in each row, column, and color region
Two queens cannot be adjacent to ...
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Solve Tango Puzzle
Tango is a puzzle that consists of a 6x6 grid partially filled with moons (M) and suns (S) and two lists of coordinate pairs, which we will call = and ...
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Index into a Fibonacci tiling
The Cartesian plane can be tiled with increasingly large squares like so:
This tiling can be generated by starting with a square of side length 1, placed at the origin ...
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Make a textual Paint-like program
Write a program/function that can help users make simple drawings by moving a cursor contained within a grid of characters, and by selecting which characters should be at a specific position.
Expected ...
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Simplified canvas builtin
related
The golfing languages 05AB1E and Vyxal have a "canvas" builtin that draws a string on a ASCII grid. In this challenge, you'll be implementing a simplified form of this.
You should ...
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9-16-25 2D Matrix
Given three grids and the sum of rows and columns of each grid, your task is:
Grid \$3×3\$: Fill the grid from \$1\$ to \$9\$, ensure no repeats within the grid.
Grid \$4×4\$: Fill the grid from \$1\...
user123147
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3 Dimensional Minesweeper
3-Dimensional Minesweeper
I've been on a minesweeper kick for a while, but all the questions are for 2 dimensions (or that one in 1D). But 2D is 2 easy!
Challenge
Write the shortest code possible to ...
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How many cacti can I plant here?
Given a Minecraft terrain as a 2-dimensional array of integers or similar datastructure, determine the maximum number of cacti that can be planted on it.
The integers represent the height (y) of the ...
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Can I Clear The Grid?
I recently found this game and have been enjoying it. Basically, there is a grid of colored tiles and you act by clicking on empty spaces. When you click an empty space, the first tile (if any) in ...
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Is it a Valid Crossword Grid?
In crossword terminology, the grid is the region into which the crossword answers are inserted, consisting of white and black squares. The crossword answers, called entries, are inserted into ...
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Implement grambulation
Consider the following spiral of positive integers:
We now define grambulation as a binary operation \$\lozenge : \mathbb N \times \mathbb N \to \mathbb N\$, using this grid. Some example inputs and ...
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Simultaneously solve N-queens and no-3-in-line
An intriguing MathsSE question asked if there were large N-queens solutions where no three queens lie on a line. That question's body included the unique 4×4 solution up to symmetries
...
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Create a bingo card generator
Bingo
Bingo is a numbers game where players match randomly drawn numbers to the numbers on their cards. Each bingo card is a square grid with 25 spaces, and the columns of the grid are labeled with ...
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