What is the world record for solving a Sudoku?
What is the world record for solving a Sudoku?
54.44 seconds
8 (Xinhua) — China’s Wang Shiyao set a new world record in Sudoku on Wednesday when she managed to solve a 9×9 sudoku grid in 54.44 seconds at the World Sudoku & Puzzle Championship held in Prague. The win was confirmed by championship director Jan Zverina. Czech Jakub Ondrousek was the former world record holder.
What is considered a good sudoku time?
The good sudoku time is one where one is able to solve a complex sudoku game which is in itself a combination of 5 or more sudokus. From the competition point of view, the lesser time one takes the better it is. For very hard say 5 to 7 minutes should be great.
Is Killer sudoku harder than regular sudoku?
Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver’s skill at mental arithmetic; the hardest ones, however, can take hours to crack.
Is Sudoku An NP?
Introduction. The generalised Sudoku problem is an NP-complete problem which, effectively, requests a Latin square that satisfies some additional constraints. In addition to the standard requirement that each row and column of the Latin square contains each symbol precisely once, Sudoku also demands block constraints.
What is samurai Sudoku?
A Samurai Sudoku puzzle is a grid built with five sudoku puzzles of nine squares aside. The rules of the game are similar to those of a classic sudoku. You must find, in each of the five grids, nine different numbers, by region of 3 out of 3, by column and by line Each samurai sudoku from this site has only one solution.
How many squares are in a daily samurai puzzle?
We offer a free daily Samurai puzzle every day, and you can generate and solve them with our Sudoku Puzzle Generator. They look formidable as they are made up of 5 overlapping standard Sudoku puzzles with a grid containing a total of 369 squares.
Why can’t square NH take a 2 in Sudoku?
Because of the large grid size it has to use a different way to refer to squares, it uses P1 to P5 to identify the 5 puzzles within a Samurai. So in Sudoku Dragon’s explanation as to why square Nh can not take a 2 it explains the existing occurrence of a ‘2’ in both puzzles bottom left and central sub-puzzles.
Do you feel at ease with samurai puzzles?
Indeed everyone feels differently at ease in the various reasoning used. Samurai puzzles are a variation of classic sudoku. It allows veterans to find new configurations. Beginner and advanced levels can be solved by visual diagrams. The expert level often requires the presence of marked candidates.
