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React Chessboard Click/Highlight (N×N Board)

By FrontendAtlas Team · Updated Feb 9, 2026

Build an interactive N×N chessboard in React. Clicking a cell should highlight it and clear the previous selection. Include a size control so users can switch board dimensions.

Render an N×N chessboard where light/dark squares alternate correctly.
Allow changing N via a numeric input (for example 2..20).

What you’ll build / What this tests

This premium react coding focuses on React Chessboard Click/Highlight (N×N Board). You’ll apply react and state thinking with medium level constraints. The prompt emphasizes Build an interactive N×N chessboard in React. Clicking a cell should highlight it and clear the….

Learning goals

Translate the prompt into a clear react API signature and return shape.
Apply react, state, event-handlers techniques to implement react chessboard click/highlight (n×n board).
Handle medium edge cases without sacrificing readability.
Reason about time/space complexity and trade-offs in react.

Key decisions to discuss

Define the exact input/output contract before coding.
Prioritize predictable edge-case handling over micro-optimizations.

Evaluation rubric

Correctness: covers required behaviors and edge cases.
Clarity: readable structure and predictable control flow.
Complexity: avoids unnecessary work for large inputs.
API discipline: no mutation of inputs; returns expected shape.
Testability: solution is easy to unit test.

Constraints / Requirements

Render an N×N chessboard where light/dark squares alternate correctly.
Allow changing N via a numeric input (for example 2..20).
Clicking a square highlights that square.
Only one square can stay highlighted at a time.
Changing board size re-renders the board and resets selection safely.
Expose selected cell coordinates in the UI (row/column).
Keep keyboard accessibility with semantic button/grid roles.
Initial render shows an 8×8 board with no selected square.
Clicking row 3 column 5 highlights that square and updates status text.
Clicking a different square removes previous highlight and applies new one.

Mini snippet (usage only)

// Example usage
const input = /* react chessboard click/highlight (n×n board) input */;
const result = solve(input);
console.log(result);

// Edge case check
const empty = input ?? null;
const fallback = solve(input);
console.log(fallback);

// Expected: describe output shape, not the implementation
// (no solution code in preview)

Common pitfalls

Mutating inputs instead of returning a new value.
Skipping edge cases like empty input, duplicates, or nulls.
Overlooking time complexity for large inputs.