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The Puzzlemaker

Rules: 1. The digits 1 through 9 appear in each row, each column, and each 3X3 sub block exactly once. 2. Digits in green squares are in the correct row and column of the sub - block. 3. Digits in yellow squares aren ’ t in that square, but do appear in either that row or column of the sub - block. 4. Digits in gray squares do not appear in that row or column of the sub - block. 5. The puzzles are rotationally symmetric - the board can be rotated by 90 degrees and the design remains the same.

Dr. David Shoenthal Professor of Mathematics, Chair Longwood University shoenthaldw@longwood.edu

Written by: David Shoenthal, Associate Vice President for Academic Affairs and Professor of Mathematics, Longwood University

Answers will be featured in Vol 48(2) of the Virginia Mathematics Teacher .

Virginia Mathematics Teacher vol. 48, no. 1

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