diff --git a/CP/12_sudoku.cpp b/CP/12_sudoku.cpp
new file mode 100644
index 0000000..24096ba
--- /dev/null
+++ b/CP/12_sudoku.cpp
@@ -0,0 +1,55 @@
+// #include<iostream>
+// #include<queue>
+// using namespace std;
+// bool SolveSudoku(int grid[N][N])  
+//     { 
+//         // Your code here
+//         for(int i=0;i<9;i++){
+//             for(int j=0;j<9;j++){
+//                 if(grid[i][j]==0){
+//                     for(int k=1;k<=9;k++){
+//                         if(isValid(grid,i,j,k)){  //if that value can be placed
+//                             grid[i][j]=k;
+//                             if(SolveSudoku(grid)==true){ //recursion, stop once a result is found
+//                                 return true;
+//                             }
+//                             else{
+//                                 grid[i][j]=0; //backtracking if solution is not found
+//                             }
+//                         }
+//                     }
+//                     return false;
+//                 }
+//             }
+//         }
+//         return true;
+//    }
+//     bool isValid(int grid[N][N],int row, int col, int k){
+//         for(int i=0;i<9;i++){
+//             if(grid[row][i]==k){   //checking every column of a row
+//                 return false;
+//             }
+//             if(grid[i][col]==k){    // checking every row of a column
+//                 return false;
+//             }
+//             if(grid[3*(row/3)+i/3][3*(col/3)+i%3]==k){  //checking that 3x3 box
+//                 return false;
+//             }
+//         }
+//         return true;
+//     }
+    
+//     //Function to print grids of the Sudoku.
+//     void printGrid (int grid[N][N]) 
+//     {
+//         // Your code here 
+//         for(int i=0;i<9;i++){
+//             for(int j=0;j<9;j++){
+//                 cout<<grid[i][j]<<" ";
+//             }
+//         }
+//     }
+// int main(){
+//         int N = 9;
+
+//     }
\ No newline at end of file