Number Baseball Game

Deduce the computer's secret number from Strike and Ball hints in this classic logic game. 3-digit and 4-digit modes.

Number Baseball is the classic code-breaking deduction game known worldwide as Bulls and Cows. The computer secretly picks a number made of distinct digits, and your job is to crack it in as few guesses as possible. It's pure logic — no luck, no vocabulary, no reflexes — just you narrowing down the possibilities one clue at a time. The rules are trivial to learn but the deduction runs surprisingly deep, which is exactly why it has entertained puzzle lovers for over a century.

Each turn you enter a guess, and the game answers with three signals. A Strike means a digit is correct and in the right position. A Ball means a digit is correct but sitting in the wrong position. Out means the guess shares no digit at all with the secret number. A perfect read — for example "3 Strikes" in the 3-digit mode — means you've solved it. Every answer strips away wrong possibilities, so a sharp player treats each response as evidence and reasons forward logically instead of guessing blindly.

Pick your difficulty: 3-digit for a quick warm-up or 4-digit for a serious deduction workout. Because every digit in the secret is distinct, the search space is finite and fully solvable by pure reasoning. Skilled players routinely crack a 4-digit code in around seven guesses, and the theoretical optimum is even lower — leaving plenty of room to sharpen your technique and chase a personal best.

The smart approach is to spend your first couple of guesses gathering information rather than trying to win immediately. Probe with digit sets that cover a wide range, note which digits produce Strikes or Balls versus Outs, then cross-reference the position clues to lock digits into place. Keeping a mental (or written) log of what each response rules out is the single biggest jump from casual player to consistent solver.

It fits any spare minute, needs zero installation, and is completely free to play in your browser. Because the logic is language-independent, it plays the same in any country — a perfect brain teaser for commutes, coffee breaks, or a head-to-head deduction duel. Test your logic today on Giggleus Number Baseball and see how few tries it takes you.