Number Mode Guide: Strategies for Digit Guessing

How Number Mode Works

Number mode follows the same core rules as word mode. A secret code is generated using digits (0-9), and you guess combinations of digits. After each guess, you receive feedback: Bulls (correct digit in the correct position) and Pigs (correct digit in the wrong position). Your goal is to deduce the secret number in as few guesses as possible.

The fundamental difference from word mode is the alphabet size. Words use 26 letters, but numbers use only 10 digits. This smaller set of possibilities means number mode puzzles are generally solvable in fewer guesses, but the logic required is just as sharp.

Key Differences from Word Mode

The most important difference is that there is no dictionary constraint. In word mode, you must guess valid English words, which limits your options but also gives you structural clues (common letter patterns, prefixes, suffixes). In number mode, every combination of digits is valid, which means you have complete freedom in choosing your guesses but no structural hints to lean on.

This makes number mode more purely logical. You cannot rely on vocabulary knowledge or word pattern recognition. Every solve comes down to systematic deduction: testing digits, tracking which ones are confirmed, and working out their positions.

Opening Guess Strategy

With only 10 possible digits, your opening strategy can be very systematic. A strong approach for a 4-digit code is to start with a guess that tests four unique digits, such as 1234. If this returns 0 Bulls and 0 Pigs, you have eliminated four digits entirely and know the answer contains only digits from 0, 5, 6, 7, 8, and 9.

A common opening sequence for 4-digit codes is: first guess 1234, second guess 5678. After these two guesses, you have tested 8 of 10 digits. If neither guess produced any Bulls or Pigs, you know the answer uses only 0 and 9. If both produced feedback, you typically have enough information to start solving by the third guess.

For longer codes (5-6 digits), you can test even more digits per guess. A 5-digit opening of 12345 followed by 67890 tests all 10 digits in just two guesses. After processing the feedback from both, you know exactly which digits are in the code.

Positional Logic

Once you know which digits are in the code (from your opening guesses), the challenge shifts to determining their positions. This is where the Bulls and Pigs feedback system becomes your primary tool.

Suppose your first guess 1234 returns 1 Bull and 1 Pig. You know two of those four digits are in the code: one is in the correct position, and one is in the wrong position. Your next step is to rearrange those digits to test different positions. If you guess 2143 and get 0 Bulls and 2 Pigs, you learn that two digits are present but both are in wrong positions. Comparing this with the first result narrows the possibilities significantly.

The key technique is tracking position constraints for each digit. For every digit you know is in the code, maintain a list of positions where it cannot be (positions where it appeared in a guess that did not earn a Bull for that slot). After a few guesses, each digit often has only one or two possible positions remaining.

The Swap Technique

One powerful technique in number mode is the targeted swap. Once you have a guess that scored some Bulls, swap two digits' positions and observe how the Bull count changes.

If swapping two digits decreases the Bull count by 2, both digits were originally Bulls (they were both in correct positions before the swap). If the Bull count stays the same, neither digit was a Bull in either position (or both are Bulls in both arrangements, which only happens if they are the same digit). If the Bull count changes by 1, exactly one of the two digits was a Bull in its original position.

This technique lets you isolate which specific digits are Bulls without testing entirely new combinations. It is one of the most efficient ways to resolve position ambiguity in number mode.

Dealing with Repeated Digits

Depending on the game settings, the secret number may contain repeated digits (for example, 1123 or 5535). Repeated digits add complexity because a single digit can account for multiple Bulls or Pigs. If you guess 1111 against a code containing two 1s, you might get 2 Bulls (if both 1s are in matching positions) or a mix of Bulls and Pigs.

When repeated digits are possible, pay close attention to feedback counts that seem inconsistent with your assumption of unique digits. If your feedback suggests more matches than the unique digits in your guess would allow, a repeat is likely.

Practice Tips

• Start with 4-digit codes. The smaller possibility space lets you practice positional logic without being overwhelmed.
• Write down your constraints. Number mode is heavily logical, and tracking constraints on paper (or mentally) is essential for efficient solving.
• Use systematic opening guesses. The 1234/5678 opening covers 80% of possible digits in two moves.
• Practice the swap technique. It becomes second nature after a few games and dramatically speeds up position resolution.

Ready to Play?

Switch to Number mode in Pigs and Bulls and put these strategies to the test. If you are new to the game, start with the How to Play guide for the basics, then come back here for number-specific tactics. For word mode strategies, check out the best opening words guide and the beginner vs. advanced strategies article.