NUMBERS · ORIGINAL BROWSER GAME
Mini Sudoku
Complete a 4×4 Sudoku so every row, column and 2×2 box contains 1 through 4.
Implementation reviewed August 11, 2026 · Published independently by StarboxPLAY THE CURRENT BUILD
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DIRECT ANSWER
How do you solve the Starbox Mini Sudoku?
Fill the editable cells so every row, column and bold 2×2 box contains 1, 2, 3 and 4 exactly once. Tap an empty cell repeatedly to cycle its value.
- Grid: 4×4
- Given purple cells cannot change
- Only the exact complete solution wins
Rules and objective
Complete a 4×4 Sudoku so every row, column and 2×2 box contains 1 through 4. Given cells are fixed; tapping an empty cell cycles it through 1, 2, 3 and 4 before comparison with the solution.
How scoring works
A correct completed grid records 100 points. Scores are saved only in this browser's local storage, so changing devices or clearing site data starts a new local record.
What we checked in this build
We verified that fixed cells cannot change, all editable cells cycle correctly and only the complete solution triggers success.
This note describes the Starbox implementation rather than the rules of every similarly named game elsewhere.
FIRST-HAND CHECK
Test record
- Tested
- August 11, 2026
- Environment
- Source-level puzzle-state review and production build on Windows 11.
Procedure
- Checked the fixed-cell guard for every given position.
- Traced editable cells through the 1, 2, 3, 4 value cycle.
- Compared the completion check with the full solution and reviewed Reset.
Observed result
Given cells were locked, editable cells followed the documented four-value cycle, completion appeared only for the exact solution, and Reset restored the original puzzle.
WORKED EXAMPLE
Example: solve the first row by elimination
Starting position: The first row is 1, blank, blank, 4.
Reasoning: The missing values are 2 and 3. Column two already contains 4 and 1, while its 2×2 box constrains the placement; checking the column and box together assigns 2 to the second cell and 3 to the third.
Takeaway: List the missing row values first, then use the intersecting column and box to place them.
List what a unit is missing
Each row, column, and two-by-two box must contain 1, 2, 3, and 4 once. For a row showing 1, blank, 3, blank, the missing set is {2,4}. Do not guess between them yet; carry that small candidate set to the column check.
Intersect all three constraints
A cell is valid only if its number is absent from the row, column, and box. If the row allows {2,4}, the column already contains 4, and the box allows both, the cell must be 2. This intersection is the core operation of mini Sudoku.
Place forced values first
Scan for a unit with only one missing number, then for a cell whose candidate set has one value. Every forced placement updates three units and may create another forced move. Filling the easiest certainty first is faster and safer than working left to right.
Recover from a contradiction
If a later cell has no possible value, an earlier entry was wrong. Review user-entered numbers in reverse order and test each against its row, column, and box. Avoid replacing multiple values at once; one controlled correction preserves the deductions that remain valid.
Editorial and correction notes
This page was checked against the game code and its visible controls. It does not present entertainment scores as medical, educational, or professional assessments. If a rule, score, or control behaves differently from this description, email songtianqi0920@gmail.com with the page URL, browser, and device.
Play the current build, then return to compare the result with the strategy above.