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Sudoku drives the world mad! In the past logical puzzles in Europe took a backseat, with the emergence of Sudokus this has completely changed. This type of game became popular in Japan as they do not have an alphabet in order to produce conventional puzzles. The wave swept from Japan to USA then after to Europe, then suddenly the game became popular worldwide. Despite common belief the game of Sudoku (Jap: 数独, su : number, doku: single) did not really originate in Japan. Magic Number Square - a long time to develop the game
This super Magic Square originates from the copperplate “Melencolia I” by Albrecht Dürer (1471 - 1528) from the year 1514 AD - the sum is always 34, whether horizontally, vertically, or diagonally and in each four square block. As well as that the bottom two middle squares give the year when the art work originated. Magic Number Squares as tricky puzzles
The first Sudoku was probably produced in Europe later, based on the copperplate by Albrecht Dürer, using the mathematical background information of Leonhard Euler and was intended for Majorcan and Irish weeklies. But at that time the puzzle was rejected as being too difficult. Ultimately the Japanese publication “Nikoli” has managed to make the Sudokus popular and give it a more attractive name. The first European paper to have printed Sudokus regularly is not – as often thought – 2005 “The Times”, but the much earlier “Mallorca Magazin”, immediately followed by “Haller Lokalanzeiger” (Tyrol) and “tip” (Innsbruck) – all customers of ROQA. Endless variations of Sudoku Today ROQA can provide for the print media a huge amount of Sudoku variations in different sizes (4x4 to 16x16 squares) designs and levels. Whether in Colour Sudoku, Sudoku Sum, Sudoku Cross, Bigger-Smaller-Sodoku, Samurai, Sudoku X or Sudoku for children. Whether with numbers, letters or pictures or – brand new in the puzzle market – classical prize words, we have them all at ROQA.
At present there is a need for new variants. Two brand new Sudokus developed by ROQA are the Su-Kakuro and the „Ensaimada” first published in the „Mallorca Magazin”.
Other logicals Following this known logic, many types of puzzle have been created. The number triangle of the philosopher and mathematician Blaise Pascal (1623-1662) was an aid to calculating probabilities, but has now become more famous as Summing up.
Further logicals In addition to the puzzles in this category, there are Logicals you can find on other pages of this website. Usually these Logicals are variants of other puzzle types, e.g. the Circular Crossword. The mathematical variant of this puzzle gives letters a value; A=1 ... Z=26 , and the clues are the result of the multiplication of all values of the word. A really tricky puzzle!
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Magic Squares already had a very important “place” metaphysically, in medieval Europe. They were thought to ward off evil and so in this context we can understand one of the most famous magic number squares: it was thought to protect the world from predicted destruction due to a comet impact.
The mathematical basis for today’s Sudokus comes from – abstractly – the Swiss mathematician Leonhard Euler (1707-1783) whereby the so called “Carré latin” (latin square) was not intended to be a puzzle game - today available as 
