Daily Sudoku game with an additional rule for the diagonals. Every day new sudoku games with the following rules: each row, column, 3x3 box and diagonal contains the numbers 1 to 9 only once.
Sudoku-X shares the same rules as a regular Sudoku puzzle, with the only difference being the fact that Sudoku-X puzzles have a cross of shaded squares running from corner to corner. These Shaded squares must also contain the numbers from 1–9, with only one instance of each number allowed in any one diagonal line.
This is a variant of the popular Sudoku puzzle which contains two extra constraints on the solution, namely the diagonals, typically indicated by grey cells. In a normal Sudoku puzzle all rows, columns and 3x3 boxes must be filled with the numbers 1 to 9 without repeating a number.12-Apr-2008
Sudoku keeps your brain active and reduces the risk of Alzheimer's, a most common cause of dementia that affects a person's thinking and behavioural skills. Stimulates your mind: The game works on your logical thinking process as you are absorbed in solving a puzzle and eventually improve your number skills.09-Sept-2022
This strategy is looking at single numbers in rows and columns. It should be easier to spot in a game as we can concentrate on just one number at a time. X-Wing example 1 : Load Example or : From the Start The picture on the right shows a classic X-Wing, this example being based on the number seven.10-Apr-2008
From this case study it can be concluded that an individual who is skilled at solving Sudoku puzzles likely has a high general IQ. The results of the weak correlation between Sudoku scores and the WAIT test indicates that in some cases a high Sudoku doesn't necessarily mean a high general IQ.
Practising a game like sudoku or using a brain training app might make you better at it but it won't boost your IQ or general brain power, a study claims.01-Aug-2018
The 45 rule is a basic solving-technique in Killer Sudoku. Each house (row, column, nonet) must add to 45 (the sum of the digits 1 through 9).19-Feb-2007
Sudoku requires attention of the subject to analyze the grids and fill in the numbers; basically it requires no math but is based on logic . Solving puzzles has long been thought to keep the brain healthy  and has been shown to delay the onset of dementia .
Sudoku is a logic-based puzzle. It is a type of constraint satisfaction problem, where the solver is given a finite number of objects (the numerals 1-9) and a set of conditions stating how the objects must be placed in relation to one another.
According to a recent study published in the International Journal of Geriatric Psychiatry, the more people over 50 engage in games such as sudoku and crosswords, the better their brains function.22-May-2019