SUDOKU GAME.

Description:

Sudoku is a logic-based, combinatorial number-placement puzzle. In classic Sudoku, the objective is to fill a 9 × 9 grid with digits so that each column, each row, and each of the nine 3 × 3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.

Requirement

Domain Model

Glossary

Sudoku A logic-based, combinatorial number-placement puzzle in which a 9x9 grid must be filled with digits so that each row, column, and 3x3 subgrid contains all of the digits from 1 to 9 exactly once. It is a popular puzzle that can be enjoyed by people of all ages and skill levels. There are many different variants of Sudoku, such as 4x4 Sudoku, irregular Sudoku, and symbol Sudoku.
Player The person who attempts to solve the Sudoku puzzle. They may also be called a "solver" or a "solutionist".
Level The difficulty of the Sudoku puzzle, which can range from beginner to expert. Difficulty levels are based on the number of pre-filled digits on the board and the complexity of the strategies required to solve it.
Generator An algorithm or computer program that is responsible for creating and designing Sudoku puzzles with different difficulty levels. Sudoku generators use mathematical techniques and search algorithms to create valid and challenging puzzles.
Board The 9x9 grid that is divided into 9 3x3 subgrids and serves as the foundation for the Sudoku game. The Sudoku board may also be called a "grid" or a "square".
Row A horizontal series of 9 cells on the Sudoku board that may be empty or contain numbers from 1 to 9. Each row is divided into 3 3x3 subgrids. Sudoku rows may also be called "horizontal lines".
Column A vertical series of 9 cells on the Sudoku board that may be empty or contain numbers from 1 to 9. Each column is divided into 3 3x3 subgrids. Sudoku columns may also be called "vertical lines".
Subgrid A 3x3 grid that is located within the Sudoku board. Each subgrid must contain all of the digits from 1 to 9 exactly once. Sudoku subgrids may also be called "boxes", "blocks", or "regions".
Cell Each of the 9x9 cells on the Sudoku board.
Digit The numerals used in the game (from 1 to 9)
Initial Digit Given digit by the generator, which cannot be changed
Candidate Number A number that could potentially be placed in a specific cell but has not yet been confirmed.
Color suggested color schemes for differentiating between initial digits, player digits, hints, and player highlights in Sudoku
Solving Strategy A technique used to identify the correct placement of numbers on the Sudoku board. Some common strategies include candidate elimination, unique pair hunting, and hidden triple hunting.
Single Solution A well-posed Sudoku puzzle only has one valid solution.
Incomplete Sudoku A Sudoku puzzle that has some pre-filled digits but has not yet been completed.
Blank Sudoku A Sudoku puzzle that has no pre-filled digits and must be completed from scratch.
Undo Reverses the last action taken by the player, such as placing a digit or removing a highlight.
Redo Repeats the last action that was undone.
Save Preserves the current state of the Sudoku puzzle, allowing the player to resume later.
Load Retrieves a previously saved Sudoku puzzle and loads it into the game interface.
Restart Begins Sudoku puzzle, discarding any progress made on the current puzzle.
Put Places a digit into a selected cell on the Sudoku board.
Highlight Selects a specific cell on the Sudoku board, often for the purpose of adding a mark or applying an action.
Help Provides assistance to the player, such as suggesting possible moves or highlighting potential errors.