PlaySudoku.us
Hard · Puzzle #933
5
1
7
6
8
3
2
9
9
2
8
7
9
2
3
8
7
5
1
9
2
3
6
1
5
4
The 4×4 mini-Sudoku (with digits 1–4) is used in elementary schools worldwide as an introduction to logic puzzles.
The 4×4 mini-Sudoku (with digits 1–4) is used in elementary schools worldwide as an introduction to logic puzzles.
After placing a digit, immediately check its row, column, and box for new naked singles.
After placing a digit, immediately check its row, column, and box for new naked singles.