Las Matemáticas del Sudoku Ripeto, actividad en la Semana de la Ciencia y la Innovación 2021

Dentro de las actividades de la Semana de la Ciencia y la Innovación 2021, el próximo 11 de Noviembre a las 7 de la tarde, en la Escuela Superior de Ingenieros de Telecomunicación de Madrid, vamos a hablar de las Matemáticas del Sudoku Ripeto: de las nuevas reglas necesarias para resolverlo y de los posibles patrones de repetición que pueden darse entre los números, entre otros temas.

Para reservar plaza (hasta que se complete el aforo) hay que enviar un correo a info@sudokuripeto.com.

Más información en https://www.madrimasd.org

Presenting Sudoku Ripeto and Custom Sudoku

This is a short description of Sudoku Ripeto and Custom Sudoku, the first Sudoku variants with repeated numbers and letters, respectively.

Gathering for Gardner's Gift Exchange Book

Sudoku Ripeto and Custom Sudoku are featured in the Gift Exchange Book following the Gathering for Gardner 13th Conference, that was held in Atlanta in 2018. The book is available for download here.

The Sudoku Ripeto Puzzle

Sudoku Ripeto is a Frequency Puzzle played on a square board with nine rows, nine columns, and four 3 x 3 sub-squares as regions. The difference with classical Sudoku is that numbers may repeat: this requires new solving strategies, and provides players with new solving experiences.

Sudoku Ripeto: Power Mix (Volume 2)

Sudoku Ripeto: Power Mix (Volume 2) contains 60 Sudoku Ripeto puzzles with assorted difficulties and repetition patterns.

Sudoku Ripeto is the first Sudoku variant with repeated numbers. It presents new challenges to players and requires new solving techniques

The Sudoku Ripeto Family

Presentation at the 13th Gathering 4 Gardner Conference in Atlanta.

The Math behind Sudoku Ripeto

Mathematically, solving a Sudoku Ripeto or Custom Sudoku puzzle can be formulated as a problem of hypergraph coloring. As with classical Sudoku, finding puzzles and solutions can be performed with techniques like constraint programming or dancing links.
Of interest are questions of existence, enumeration and minimality. For example: what is the minimum number of clues that a Sudoku Ripeto puzzle played with numbers 111222333 may have? The answer for classical Sudoku is 17.
Many interesting decision questions about Sudoku Ripeto may well be NP-complete. In this case there could be no worst-case polynomial time algorithm able to answer them. One of these questions is: given a partially filled board, does it have a solution? For partially filled Latin squares the problem is known to be NP-complete indeed.