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Easy Sudoku 4×4
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각 가로줄, 세로줄, 굵은 칸에 숫자가 한 번씩 들어가게 쓰세요.
Practice and check
Worked example
Check one empty cell against its row, column, and 2×2 box. Only a candidate allowed by all three may be written.
Row 1, Column 4: {1,2,3,4} − {1,2,3} = {4}
- Row 1, Column 4
- {1,2,3,4} − {1,2,3} = {4}
Check answers after trying
1: 1 2 3 4 / 3 4 1 2 / 2 1 4 3 / 4 3 2 1 2: 2 1 4 3 / 4 3 2 1 / 1 2 3 4 / 3 4 1 2 3: 3 2 4 1 / 4 1 3 2 / 2 3 1 4 / 1 4 2 3 4: 4 3 1 2 / 1 2 4 3 / 2 1 3 4 / 3 4 2 1
Printed order
Tips for Parents
Four puzzles use digits 1–4, with 4, 6, 7 and 8 blanks. Fill each row, column and bold 2×2 box without repeats. In puzzle 1, the top row shows 1, 2 and 3. Write 4 in its last cell, then check that column and the upper right box. If a row has two gaps, check the column and the bold box for each gap. Say which digits are already used before writing. Every puzzle can be finished one forced cell at a time. Check every row, column and bold box for exactly one of each digit. Use the 9×9 practice set when these checks feel familiar.
What This Worksheet Builds
If a row has two gaps, check the column and the bold box for each gap. Say which digits are already used before writing. Every puzzle can be finished one forced cell at a time.
Next Step
Check every row, column and bold box for exactly one of each digit. Use the 9×9 practice set when these checks feel familiar.