sudoku

Check if Sudoku solution is valid [closed]

由 独自空忆成欢 提交于 2019-12-04 09:57:45
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . You're given a solution to a Sudoku puzzle. Write the code to check if it's a valid solution. Your function signature should be: boolean isValid(int starti, int startj, int endi, int endj) Rules for those unfamiliar with Sudoku: Grid size is 9x9, divided into 9 regions of 3x3 Each

Sudoku solver, not backtracking solver [closed]

由 六眼飞鱼酱① 提交于 2019-12-04 07:13:38
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago . The past few weeks I've been working on a sudoku game. The game as a lot of features such as: play game, print sudoku, solve sudoku. The solve function uses conventional backtracking but thats not the issue, the issue is that I need the game to be able to produce a humanely

Help With Java Sudoku Permuter Program using Two Dimensional Array?

由 落爺英雄遲暮 提交于 2019-12-04 06:30:33
问题 I have to create a program that displays the 9 rows of a sudoku as 9 9-digit numbers and then prompt the user to do one of 6 operations on the sudoku. Then we have to output the sudoku each time the user performs an operation. This is sort of a sample run of how it should go: Welcome to Sudoku Permuter. C C C C C C C C C 1 2 3 4 5 6 7 8 9 R1 0 8 0 4 0 2 0 6 0 R2 0 3 4 0 0 0 9 1 0 R3 9 6 0 0 0 0 0 8 4 R4 0 0 0 2 1 6 0 0 0 R5 2 0 0 0 0 9 6 0 0 R6 0 1 0 3 5 7 0 0 8 R7 8 4 0 0 0 0 0 7 5 R8 0 2 6

Multi-Sudoku AI approach

由 末鹿安然 提交于 2019-12-04 03:28:02
问题 I'm conceptualizing a solver for a variant of sudoku called multi-sudoku , where multiple boards overlap like so: If I understand the game correctly, you must solve each grid in such a way that the overlap between any two or more grids is part of the solution for each. I'm unsure as to how I should be thinking about this. Anybody got any hints/conceptual clues? Additionally, if any topics in artificial intelligence come to mind, I'd like to hear those too. 回答1: Constraint programming (CP)

Code Golf: Validate Sudoku Grid

由 早过忘川 提交于 2019-12-03 15:33:43
问题 Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Introduction A valid Sudoku grid is filled with numbers 1 to 9, with no number occurring more than once in each sub-block of 9, row or column. Read this article for further details if you're unfamiliar with this popular puzzle. Challenge The challenge is to write the shortest program that validates a Sudoku grid that

Unique methods to generate sudoku puzzle [duplicate]

由 送分小仙女□ 提交于 2019-12-03 12:42:21
This question already has an answer here: How to generate Sudoku boards with unique solutions 9 answers How many possible unique ways are there to generate a Sudoku Puzzle?? I can think of only two possible ways 1) Take a solved Sudoku puzzle and shuffle the rows and columns 2) Generate a random number and check if it violates any Sudoku constraints, repeat untill number does not violate any Sudoku constraint for every square(theoretically possible but normally it leads to deadlocking ) Are there any other ways? Here is a 20-page PDF, titled "Sudoku Puzzles Generating: from Easy to Evil", that

How to prevent genetic algorithm from converging on local minima?

由 ▼魔方 西西 提交于 2019-12-03 08:53:38
I am trying to build a 4 x 4 sudoku solver by using the genetic algorithm. I have some issues with values converging to local minima. I am using a ranked approach and removing the bottom two ranked answer possibilities and replacing them with a crossover between the two highest ranked answer possibilities. For additional help avoiding local mininma, I am also using mutation. If an answer is not determined within a specific amount of generation, my population is filled with completely new and random state values. However, my algorithm seems to get stuck in local minima. As a fitness function, I

Sudoku algorithm in C#

由 半世苍凉 提交于 2019-12-03 07:56:12
问题 I need one liner (or close to it) that verifies that given array of 9 elements doesn't contain repeating numbers 1,2,3,...,9. Repeating zeroes do not count (they represent empty cells). The best I have came out so far is: var a = new int[9] {1,2,3,4,5,6,7,8,9}; var itIsOk = a.Join(a, i => i, j => j, (x, y) => x) .GroupBy(y => y).Where(g => g.Key > 0 && g.Count() > 1).Count() == 0; If you don't want to solve my problems :), could you at least tell if the above algorithm works correctly? And,

Brute force Algorithm for creation of Sudoku Board

由 本小妞迷上赌 提交于 2019-12-03 07:43:37
What I am developing is that initially the entire sudoku board is empty. One of the random cells(out of 81) is filled with a random value(1-9). Now I want to fill all the remaining cells using brute force approach. From what I came to know after googling is that we should start with the first cell and fill it with 1(if it's valid), then fill the second cell with 2(if it's valid, we will begin checking with a number greater than the last filled cell, which in this case is 1, once we reach 9, we reset it with 1). The thing is that it's not working properly! Can anyone link me to the exact

Code Golf: Validate Sudoku Grid

由 Deadly 提交于 2019-12-03 05:05:12
Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Learn more . Introduction A valid Sudoku grid is filled with numbers 1 to 9, with no number occurring more than once in each sub-block of 9, row or column. Read this article for further details if you're unfamiliar with this popular puzzle. Challenge The challenge is to write the shortest program that validates a Sudoku grid that might not be full. Input will be a string of 9 lines of 9 characters each, representing the
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