Difficult Sudoku Group Puzzle | ||
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| Permission is granted to teachers in grades K-12 to print and photocopy these puzzles for use in their classes. Permission is also granted for individuals to print for personal use. All other rights are reserved. | ||
Place each element of the group (1 2 3 4 5 6 7 8 9) exactly once in each row, each column, and each 3x3 square.