In my blog https://sudokuhexagonalsimetric.wordpress.com/ you will discover a new game: the Symmetrical Hexagonal Sudoku. SHS is a hexagonal sudoku 61 cells, but more fun than Hanidoku. Every Monday published a post with 6 printable SHS (pdf). Of course, all free. As the blog is bilingual Catalan and Spanish (Castillian), here is an English version of the brief explanatory text on the cover:

How do you play SHS?

Place empty cells in a number from 1 to 9 absent from the three concurrent rows, knowing that the solution has to be symmetrical with respect to one of the three diagonals of the hexagon formed by the group of 61 cells (only three rows of nine cells): that is, two symmetrical cells must contain the same number.

Thus, a SHS must be solved in two stages:

- Find which of the three diagonals is the symmetry axis. Is usually quickly identify false axes, for violation of the rules discovered by repeating the numbers stated in symmetrical positions, but sometimes this is not so and have to fill all the cells, resulting this stage as long as the second.

- Continue filling until all 61 cells

You have to work with pencil and eraser, not only because the first step is to probe three possibilities, and not always be right at first, but to add empty cells candidate numbers (consistent with the concurrent row) and delete as cease to be, until only one. You have to print your play: working on the first page of each post or use the hexagonal template and copy by hand the statement.

John Dove

In the pdf document in Spanish "Consideraciones sobre los SHS" (just translate the first 3 pages) you will find practical recommendations on how to resolve the SHS.

Joan Colom / Juan Palomo