An initial configuration is given to you, and this cannot be changed. You need to use the logic of the Hint: makes suggestions for cells you might like to study - the program thinks that the correct digit for this cell is Tip 1: Look for rows, columns of 3×3 sections that contain 5 or more numbers. Work through the remaining empty cells, trying the numbers that have not been used. In many cases, you will find numbers that can only be placed in one position considering the other numbers that are already in its row, column, and 3×3 grid. Complete the grid such that each row, each column, and each 3x3 box in each of the two puzzles contains the digits 1−9. Sudoku is a fun puzzle game once you get the hang of it. At the same time, learning to play Sudoku can be a bit intimidating for beginners. So, if you are a complete beginner, here are a few Sudoku tips that you can use to improve your Sudoku skills.

How to Play The puzzle is to complete the 9 x 9 grid of boxes by putting in numbers 1 to 9 with each Complete the grid such that each row, each column, each 2x3 box and each diagonal contains the digits 1−6.

Puzzle generation

Su Doku is a kind of logic puzzle made popular in recent years in Japan and now exploding in popularity across the globe.

in which each element occurs exactly once in each row, column, depth, and subcube. The structure of these cubes is based on cyclotomic cosets ofComplete the grid such that each row, each column, each 2x4 box contains the digits 1−8. The marked cells must contain only even digits, the unmarked cells, only odd digits. Booklet of Midi Su Doku Puzzles (8 puzzles on 6x6 grids) suitable for secondary school children aged 11-13. [ Answers] van Laarhoven, P., Aarts, E.: Simulated Annealing: Theory and Applications. Reidel, Dordrecht (1987) Complete the grid such that each row, each column, each 3x4 box contains the letters 'ACEHIKLMORUV'. The solution contains a hidden word or phrase!

Complete the grid such that each row, each column and each 4x4 box contains the digits 0−9 and the letters A−F. Abramson, D., Krishnamoorthy, H., Dang, H.: Simulated annealing cooling schedules for the school timetabling problem. Asia-Pac. J. Oper. Res. 16, 1–22 (1996) Tip 2: Break the grid up visually into 3 columns and 3 rows. Each large column will have 3, 3×3 grids and each row will have 3, 3×3 grids. Now, look for columns or grids that have 2 of the same number. Logically, there must be a 3rd copy of the same number in the only remaining 9-cell section. Look at each of the remaining 9 positions and see if you can find the location of the missing number. restrictions to decide what values the empty cells can take. The initial configuration is usually chosen so that In this paper we present, to our knowledge, the first application of a metaheuristic technique to the very popular and NP-complete puzzle known as ‘sudoku’. We see that this stochastic search-based algorithm, which uses simulated annealing, is able to complete logic-solvable puzzle-instances that feature daily in many of the UK’s national newspapers. We also introduce a new method for producing sudoku problem instances (that are not necessarily logic-solvable) and use this together with the proposed SA algorithm to try and discover for what types of instances this algorithm is best suited. Consequently we notice the presence of an ‘easy-hard-easy’ style phase-transition similar to other problems encountered in operational research.Can stochastic search algorithms outperform existing deterministic heuristics for the NP-hard problemNumber Partitioning if given a sufficient, but practically realizable amount of time? In a thorough empirical investigation using a straightforward implementation of one such algorithm, simulated annealing, Johnson et al. (Ref. 1) concluded tentatively that the answer is negative. However it will let you enter wrong answers that still fit with the visible digits. You can clear a single cell by pressing the space bar. Complete the grid such that each row, each column, and each 3x4 box in each of the two puzzles contains the numbers 1−12. Kakuro puzzles can be of any size, from about 5x5 for the smallest interesting puzzle, to giant puzzles that are 30 by 30. A typical size is around 9-15 cells square. Kakuro puzzles originated in the US about 50 years ago under the name "cross-sum" puzzles. In Japan they have become known as 'kakro' puzzles, and in the U.K. we have anglicised that name to get kakuro.

Puzzle: sets up three puzzles, number 1 is average (around 20mins), 2 and 3 are hard (up to 40 mins each) Complete the grid such that each row, each column and each 2x2 box contains the digits 1−8. Each cell contains two digits, and the upper left digit is always smaller than the lower right.Complete the grid such that each row, each column, and each 3x3 box in each of the five puzzles contains the digits 1−9. Locate the hidden fleet of 1 battleship, 2 cruisers, 3 destroyers and 4 submarines from clues about how many ship parts can be found in each row and each column. As part of my work on sudoku puzzle books I designed a number of sudoku puzzle variants. When I looked at kakuro, it occurred to me that I could make a kind of sudoku-kakuro hybrid that borrowed the look of kakuro and some rules from sudoku. Lastly, there are also a few intersections of sums which define a unique value for the common cell in which neither of the sums are formed from a unique set of digits. For example when 5 in two cells crosses 21 in three cells, the common digit must be 4. It is easy to see why by looking at the sets of possible digits that make up each sum, then by studying which two sets have a single digit in common. For example you can make 5 in two by using {1,4} or {2,3}, and you can make 21 in three by using {9,8,4} or {9,7,5}; but the only digit these sets have in common is 4. Here is a complete table of all the unique intersections that are possible in kakuro.