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Grids coding challenges

Practise grids with 8 coding challenges, from easy to hard. Every challenge runs in your browser with instant tests, an AI review of your code and community solutions to compare.

Easy · 1 Medium · 7

Skills you'll practise: 2D lists4-neighbor checks8-neighbor checksA* searchAveragesBoundary handlingDiagonalsEdge countingFlood fillGrid simulationHeuristicsNeighbor counting
  • Python · C++ · C#
  • Automated tests
  • AI code review
  • Community solutions
Programming
Programming fundamentalsFrom variables to recursion, for beginners
AI and machine learning
AI Learning HubNeural networks, ML and LLMs from scratch Neural networks from scratchNeurons, backpropagation and optimizers Machine learning from scratchRegression, classification and clustering Transformers and LLMs from scratchTokenizers, attention and text generation Classical AI and reinforcement learningSearch, games and reinforcement learning
226
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8 challenges
Medium

Game of Life Step

Advance Conway's Game of Life by one generation.

You'll learn Grid simulationNeighbor counting
AdvancedGridsHackathonSimulation
Python C++ C#
0 solved
No solutions yet
Medium

Count Islands

Count groups of connected land cells in a grid.

You'll learn Flood fillRecursive DFS
BeginnerGridsLearning-pathRecursion
Python C++ C#
0 solved
No solutions yet
Medium

Gradebook Top Student

Find the student with the highest average score.

You'll learn 2D listsAverages
BeginnerFunctionsGridsLearning-path
Python C++ C#
0 solved
No solutions yet
Medium

Island Perimeter

Measure the coastline of land cells in a grid.

You'll learn Edge counting4-neighbor checks
AdvancedGridsHackathon
Python C++ C#
0 solved
No solutions yet
Medium

Tic-Tac-Toe Winner

Decide the result of a tic-tac-toe board.

You'll learn Win conditionsDiagonals
BeginnerConditionsGridsLearning-path
Python C++ C#
0 solved
No solutions yet
Medium

Minesweeper Neighbor Counts

Annotate a rectangular board.

You'll learn 8-neighbor checksBoundary handling
ArraysGrids
Python C++ C#
0 solved
No solutions yet
Easy

Row Sums

Add up every row of a grid.

You'll learn 2D listsNested loops
BeginnerGridsLearning-path
Python C++ C#
0 solved
No solutions yet
Medium

A* Search on a Weighted Grid

Find the cheapest path across a grid of terrain costs with A*, the search algorithm behind game and robot pathfinding.

You'll learn A* searchHeuristics
GraphsGridsShortest-pathai
Python C++ C#
0 solved
No solutions yet

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