Merge pull request #384 from Dishant-Tyagi/main

new sudoku solver

Author: larymak

GAMES/sudoku_solver/readme.md

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+## Sudoku Solver GUI
+
+# Overview
+This is a simple Sudoku Solver implemented in Python with a graphical user interface (GUI) using the Tkinter library. The Sudoku Solver allows you to input a Sudoku puzzle and then solves it using a backtracking algorithm. You can visualize the solution step by step on the GUI.
+
+# Features
+Interactive GUI: The Sudoku Solver features a user-friendly interface built with Tkinter, allowing you to input Sudoku puzzles and visualize the solution.
+Backtracking Algorithm: The Sudoku Solver uses a backtracking algorithm to find the solution to the input puzzle.
+Step-by-Step Solution: You can click the "Solve" button to start solving the Sudoku puzzle step by step, and observe how the solver fills in the cells.
+
+# How to Run
+Make sure you have Python installed on your system.
+Clone this repository or download the sudoku_solver.py file.
+Open a terminal or command prompt and navigate to the directory containing sudoku_solver.py.
+Run the command python sudoku_solver.py.
+The Sudoku Solver GUI window will open, allowing you to input Sudoku puzzles and visualize the solution.
+
+# How to Use
+When the Sudoku Solver GUI window opens, you'll see a 9x9 grid representing the Sudoku puzzle.
+enter value row by row in terminal ,empty space is denote by '0'.
+After entering the puzzle, click the "Solve" button to start solving the Sudoku puzzle.
+You can observe how the solver fills in the cells step by step. Once the puzzle is solved, you'll see the complete solution on the GUI.
+Additional Notes
+The Sudoku Solver uses a backtracking algorithm to find the solution to the puzzle. It tries different numbers in each cell and backtracks if it reaches a dead-end.
+You can input any valid Sudoku puzzle into the solver, and it will find the solution if one exists.
+If there are multiple solutions to the puzzle, the solver will find one of them.
+The GUI provides visual feedback on the solution process, making it easy to understand how the solver works.
+Enjoy using the Sudoku Solver GUI!

GAMES/sudoku_solver/sudoku_solver.py

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+import tkinter as tk
+
+class SudokuSolverGUI:
+    def __init__(self, master):
+        self.master = master
+        self.master.title("Sudoku Solver")
+        self.board = [[0 for _ in range(9)] for _ in range(9)]
+        self.input_sudoku()
+        self.create_widgets()
+
+    def input_sudoku(self):
+        print("Enter the Sudoku puzzle values row by row:")
+        for i in range(9):
+            row_input = input().split()
+            for j in range(9):
+                self.board[i][j] = int(row_input[j])
+
+    def create_widgets(self):
+        self.canvas = tk.Canvas(self.master, width=450, height=450, bg="white")
+        self.canvas.pack()
+
+        for i in range(10):
+            line_width = 2 if i % 3 == 0 else 1
+            self.canvas.create_line(50 * i, 0, 50 * i, 450, width=line_width)
+            self.canvas.create_line(0, 50 * i, 450, 50 * i, width=line_width)
+
+        for i in range(9):
+            for j in range(9):
+                value = self.board[i][j]
+                if value != 0:
+                    x, y = j * 50 + 25, i * 50 + 25
+                    self.canvas.create_text(x, y, text=str(value), font=("Arial", 14, "bold"))
+
+        self.solve_button = tk.Button(self.master, text="Solve", command=self.solve_sudoku)
+        self.solve_button.pack()
+
+    def solve_sudoku(self):
+        self.solve_button.config(state="disabled")
+        self.solve()
+
+    def solve(self):
+        empty_cell = self.find_empty_cell()
+        if not empty_cell:
+            self.solve_button.config(state="normal")
+            return True
+
+        row, col = empty_cell
+        for num in range(1, 10):
+            if self.is_valid_move(num, row, col):
+                self.board[row][col] = num
+                self.update_cell(row, col, num)
+                if self.solve():
+                    return True
+                self.board[row][col] = 0
+                self.update_cell(row, col, 0)
+        return False
+
+    def find_empty_cell(self):
+        for i in range(9):
+            for j in range(9):
+                if self.board[i][j] == 0:
+                    return i, j
+        return None
+
+    def is_valid_move(self, num, row, col):
+        for i in range(9):
+            if self.board[row][i] == num or self.board[i][col] == num:
+                return False
+        start_row, start_col = 3 * (row // 3), 3 * (col // 3)
+        for i in range(start_row, start_row + 3):
+            for j in range(start_col, start_col + 3):
+                if self.board[i][j] == num:
+                    return False
+        return True
+
+    def update_cell(self, row, col, num):
+        x, y = col * 50 + 25, row * 50 + 25
+        self.canvas.delete(f"number_{row}_{col}")
+        if num != 0:
+            self.canvas.create_text(x, y, text=str(num), font=("Arial", 14, "bold"), tags=f"number_{row}_{col}")
+
+def main():
+    root = tk.Tk()
+    app = SudokuSolverGUI(root)
+    root.mainloop()
+
+if __name__ == "__main__":
+    main()