First Grid
Puzzle 1 · 10 given numbers
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High-contrast preview: actual US Letter page 2, 4 x 4 Sudoku practice. Open the PDF for full-size printing. The interactive viewer can display every original page.
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Print one 4x4 Sudoku now
Choose one real puzzle from each practice level. Every file has two pages: the puzzle on page 1 and its matching answer on page 2. Print page 1 if you want only the activity.
Steady Practice
Puzzle 9 · 8 given numbers
More Open Cells
Puzzle 17 · 6 given numbers
Want more practice? Download the complete 24-puzzle pack.
What is 4x4 Sudoku?
A 4x4 Sudoku has four rows, four columns, and four 2x2 boxes. Fill every row, column, and box with 1, 2, 3, and 4 exactly once. A digit cannot repeat inside any unit. The numbers act as symbols, so the puzzle uses logic rather than arithmetic.
Puzzles 1-8
First Grid · 10 givens
Six open cells and a generous starting pattern. Every final trace completes with singles only.
Puzzles 9-16
Steady Practice · 8 givens
Eight open cells with fewer immediate placements. Every final trace completes with singles only.
Puzzles 17-24
More Open Cells · 6 givens
Ten open cells while remaining solvable by recorded singles. Every final trace completes with singles only.
Ready-to-print 13-page pack
Download the 4x4 Sudoku PDF
Page 1 teaches the rule. Pages 2-7 hold all 24 main puzzles, pages 8-9 add four 6x6 next steps, and pages 10-13 contain answers.
Preview one real 4x4 grid from each band
These are Puzzles 1, 9, and 17 from the final downloads, not decorative samples.
First Grid10 givens
4x4 Sudoku 1
1322324423
6 recorded singles · answer page 10
Steady Practice8 givens
4x4 Sudoku 9
34131341
8 recorded singles · answer page 11
More Open Cells6 givens
4x4 Sudoku 17
413231
10 recorded singles · answer page 12
1322324423
Worked first move from Puzzle 1
Look at row 1, column 3 and identify the missing digits.
Existing digits remove every option except 4.
The new digit changes the candidates in crossing units. Continue one single at a time.
Track all 24 mini Sudoku puzzles
The counts come from the saved final grids and deterministic solve traces.
| Puzzle | Band | Givens | Recorded moves | Hidden singles | Answer page |
|---|---|---|---|---|---|
| 1 | First Grid | 10 | 6 | 0 | 10 |
| 2 | First Grid | 10 | 6 | 0 | 10 |
| 3 | First Grid | 10 | 6 | 0 | 10 |
| 4 | First Grid | 10 | 6 | 0 | 10 |
| 5 | First Grid | 10 | 6 | 0 | 10 |
| 6 | First Grid | 10 | 6 | 0 | 10 |
| 7 | First Grid | 10 | 6 | 0 | 10 |
| 8 | First Grid | 10 | 6 | 0 | 10 |
| 9 | Steady Practice | 8 | 8 | 0 | 11 |
| 10 | Steady Practice | 8 | 8 | 0 | 11 |
| 11 | Steady Practice | 8 | 8 | 0 | 11 |
| 12 | Steady Practice | 8 | 8 | 0 | 11 |
| 13 | Steady Practice | 8 | 8 | 0 | 11 |
| 14 | Steady Practice | 8 | 8 | 0 | 11 |
| 15 | Steady Practice | 8 | 8 | 0 | 11 |
| 16 | Steady Practice | 8 | 8 | 0 | 11 |
| 17 | More Open Cells | 6 | 10 | 0 | 12 |
| 18 | More Open Cells | 6 | 10 | 0 | 12 |
| 19 | More Open Cells | 6 | 10 | 0 | 12 |
| 20 | More Open Cells | 6 | 10 | 0 | 12 |
| 21 | More Open Cells | 6 | 10 | 0 | 12 |
| 22 | More Open Cells | 6 | 10 | 0 | 12 |
| 23 | More Open Cells | 6 | 10 | 0 | 12 |
| 24 | More Open Cells | 6 | 10 | 0 | 12 |
How every grid was checked
One solution
A complete search counts answers up to two. Publication requires exactly one.
360 units checked
Rows, columns, and boxes in all 28 final grids reproduce the complete digit set.
No 9x9 crop reuse
Every 4x4 and 6x6 puzzle, mask, and solution is compared with crops from the existing 9x9 and Samurai boards.
Optional 6x6 next step
These four grids use 1-6 and 2x3 boxes. They are a small appendix for applying the same rule on a fuller board, not a separate 6x6 collection.
Next Step A
6541352546313245321452
6x6 · 22 givens · 14 singles · answer page 13
Next Step B
4334521652325351436232
6x6 · 22 givens · 14 singles · answer page 13
Next Step C
5421163251661521544632
6x6 · 22 givens · 14 singles · answer page 13
Next Step D
2656143652152143645653
6x6 · 22 givens · 14 singles · answer page 13
Printing and answers
Choose Letter for 8.5 x 11-inch paper or A4 for 210 x 297 mm. Pages 2-7 contain the 4x4 activities; answers are on pages 10-12.
You may print copies for personal use, one classroom, a library activity, a homeschool group, or a small community group.
Ready for a full grid?
Easy Sudoku printables keep beginner logic on 9x9 boards. The general Sudoku collection mixes easy, medium, and challenging grids.
Frequently asked questions
What numbers are used in 4x4 Sudoku?
Use 1, 2, 3, and 4 exactly once in every row, column, and 2x2 box.
Do I need to guess?
No. Every puzzle in this pack is completed by its saved sequence of naked and hidden singles.
Are answers included?
Yes. Pages 10-12 contain the 4x4 answers and page 13 contains the 6x6 appendix answers.
Are these reduced 9x9 puzzles?
No. They are generated independently for 4x4 and 6x6 rules and checked against crops from the existing 9x9 assets.
Work through puzzle 1, one step at a time
Use the original puzzle 1 in the download. Rows are counted from the top and columns from the left. Open one step when you need a hint; these six steps finish the first grid.
Step 1: row 1, column 3
The row already contains 1, 2, 3; the column contains 2, 3; the box contains 2, 3. Of the digits 1-4, only 4 is legal in this cell. Write 4 before continuing to the next step.
Step 2: row 2, column 2
The row already contains 2, 3; the column contains 2, 3; the box contains 1, 2, 3. Of the digits 1-4, only 4 is legal in this cell. Write 4 before continuing to the next step.
Step 3: row 2, column 4
The row already contains 2, 3, 4; the column contains 2, 3, 4; the box contains 2, 3, 4. Of the digits 1-4, only 1 is legal in this cell. Write 1 before continuing to the next step.
Step 4: row 3, column 1
The row already contains 2, 4; the column contains 1, 2, 4; the box contains 2, 4. Of the digits 1-4, only 3 is legal in this cell. Write 3 before continuing to the next step.
Step 5: row 3, column 3
The row already contains 2, 3, 4; the column contains 2, 3, 4; the box contains 2, 3, 4. Of the digits 1-4, only 1 is legal in this cell. Write 1 before continuing to the next step.
Step 6: row 4, column 2
The row already contains 2, 3, 4; the column contains 2, 3, 4; the box contains 2, 3, 4. Of the digits 1-4, only 1 is legal in this cell. Write 1 before continuing to the next step.