What is the Number Guessing Game?

The Number Guessing Game is a simple yet engaging logic puzzle where you try to discover a secret number within a given range. After each guess, you receive feedback—"Too High" or "Too Low"—to guide you closer to the answer. Choose from three difficulty levels: Easy (1-10), Medium (1-100), or Hard (1-1000). The goal is to find the number in as few tries as possible.

How to Play

Select your preferred difficulty level, then click "Start Game." Enter a number and click "Guess." Based on the feedback, adjust your next guess strategically. The game tracks your tries and compares your performance against the mathematical optimum using binary search. Win by guessing the correct number, and see your score ranked on the leaderboard—all stored locally in your browser.

Tips & Strategy

The most efficient strategy is binary search: always guess the midpoint of your remaining range. For example, in a 1-100 game, start with 50. If the answer is higher, try 75; if lower, try 25. This method minimizes the maximum number of guesses needed. The visualizer shows you the optimal path so you can learn and improve your strategy over time.

How many tries should it take to win?

Using binary search, the optimal tries needed are: Easy (1-10) = 4 tries, Medium (1-100) = 7 tries, Hard (1-1000) = 10 tries. Your actual tries may vary depending on your guesses, but these represent the mathematical minimum.

Where is my leaderboard stored?

Your scores are stored in your browser's local storage. This means your leaderboard persists across browser sessions on the same device and browser, but will not sync across different devices or browsers. Clearing your browser data will reset the leaderboard.

Can I play on mobile?

Yes! The Number Guessing Game is fully responsive and works on smartphones, tablets, and desktop computers. Simply open it in any modern web browser.

What is binary search?

Binary search is an algorithm that divides your search range in half with each guess. It's the most efficient method for finding a number when you receive "too high" or "too low" feedback. By eliminating half the remaining possibilities each time, you guarantee finding any number in a range of N in at most log₂(N) guesses.

Can I reset the game?

Click "Play Again" after winning to start a new game with the same difficulty, or change the difficulty selection and click "Start Game" to begin fresh. You can also clear all leaderboard scores using the "Clear All Scores" button.

Is there a time limit?

No, there is no time limit. Take as long as you need to think through your next guess. The game focuses on finding the optimal number with the fewest attempts, not speed.