CodeNFacts / brain-arena

Brain Arena

Not one big game - twenty small ones. Each Brain Battle takes 2 to 5 minutes and teaches something real: debugging, algorithms, systems, SQL, Linux, even digital logic. Play one between classes.

20 battles found

// find the bug, not the featuresignature

Code Detective

One snippet, one hidden bug. Spot it before the clock runs out.

3-5 minPlay

// O(log n) wins the racesignature

Algorithm Race

Every move is an algorithm. Pick the fastest path to the finish.

2-4 minPlay

// int float double char bool

Memory Compiler

Memorize the sequence before it vanishes, then rebuild it from scratch.

2-3 minPlay

// where's waldo, but it's a NullPointerException

Bug Hunter

A full editor, ten bugs hiding in plain sight. Find them all.

4-5 minPlay

// output = HIGH

Logic Circuit Builder

Drag AND, OR, NOT and XOR gates until the output reads TRUE.

3-5 minPlay

// SELECT * FROM freedom;

SQL Escape Room

The door only opens for a correct query. Write your way out.

3-5 minPlay

// access granted

Terminal Hacker

Looks like a hack. Is actually you learning real Linux commands.

3-5 minPlay

// clarity + structure + detail

AI Prompt Battle

Write the prompt that gets the image right. AI scores your craft.

3-4 minPlay

// O(1) one-shots everything

Time Complexity Fight

Enemies attack. Your weapon is Big-O. Choose wisely.

2-4 minPlay

// LIFO or it falls

Stack Tower

Blocks fall fast. Push, pop and peek before the tower collapses.

2-3 minPlay

// 25 -> 11001

Binary Hero

Convert decimal to binary before the enemy's timer hits zero.

2-3 minPlay

// *ptr != nullptr, hopefully

Pointer Maze

Navigate raw memory, collect variables, avoid segfaults.

4-5 minPlay

// print(output) // ?

Code Speed Challenge

No typing. Just thinking. Predict the output, fast.

2-3 minPlay

// greedy, bfs, dfs — pick right

Complexity Escape

A maze that punishes the wrong algorithm. Find the shortest path.

3-5 minPlay

// daily challenge, no mercy

Brain Blitz

60 seconds. Every subject. Combo multiplier if you keep the streak.

1 minPlay

// next(seq) => ?

Pattern Master

3, 6, 12, 24... what's next? Placement-prep pattern spotting.

2-3 minPlay

// /^[a-z]+$/ or bust

Regex Ninja

Strings fly past. Slice the ones your regex matches.

2-4 minPlay

// gcc says what?

Compiler Run

Predict: compiles clean, runtime error, or syntax error?

2-3 minPlay

// process vs thread, go

Interview Simulator

An AI interviewer asks. You answer. It scores and unlocks badges.

4-5 minPlay

// checkmate is O(1) lookaheadsignature

Code Chess

Loops, functions, arrays and queues as chess pieces. Think in algorithms.

5 minPlay

All Categories

Brain Arena

Code Detective

Algorithm Race

Memory Compiler

Bug Hunter

Logic Circuit Builder

SQL Escape Room

Terminal Hacker

AI Prompt Battle

Time Complexity Fight

Stack Tower

Binary Hero

Pointer Maze

Code Speed Challenge

Complexity Escape

Brain Blitz

Pattern Master

Regex Ninja

Compiler Run

Interview Simulator

Code Chess