Mathematics of a Sudo-Kurve

Tanya Khovanova 1  and Wayne Zhao 1
  • 1 MIT, Bridgewater–Raritan High School


We investigate a type of a Sudoku variant called Sudo-Kurve, which allows bent rows and columns, and develop a new, yet equivalent, variant we call a Sudo-Cube. We examine the total number of distinct solution grids for this type with or without symmetry. We study other mathematical aspects of this puzzle along with the minimum number of clues needed and the number of ways to place individual symbols.

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  • [1] Conway, J.H., Ryba, A. “Kenning KenKen”, an unpublished manuscript.

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  • [3] McGuire, G., Tugemann, B., Civario, C. “There is no 16-Clue Sudoku: Solving the Sudoku Minimum Number of Clues Problem via Hitting Set Enumeration”, Experimental Mathematics, 23, 190–217, 2014.

  • [4] gmpuzzles blog, available at, last accessed June 2018.

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Journal + Issues

Recreational Mathematics Magazine is a journal for mathematicians who enjoy imaginative ideas, non-standard approaches, and surprising procedures. The journal addresses such topics as: games and puzzles, problems, mathmagic, mathematics and arts, math and fun with algorithms.