diff --git a/README.md b/README.md
index 65328df..c4d2741 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,53 @@
 # Sudoku
 A C++ library for generating, validating, solving, checking, etc Sudoku puzzle. 
+
+# Installation 
+'make sudoku.cpp'
+'./sudoku'
+
+# Todo
+
+## Code
+
+- [ ] Create Header files
+  
+As what it stated ...
+
+- [ ] Reorganize code using OOP approach
+
+This is my first CPP project, I don't think I wrote OOP code properly. 
+
+- [ ] Optimised code for performance
+
+The function 'SudokuSolution()' is an enhanced version of [ leetcode - Sudoku solver ]( https://leetcode.com/problems/sudoku-solver/ )
+
+- [ ] Rename variable
+
+I wrote this in a rush , some variable is not named properly and are not consistent. rename it with meaningful variable name
+
+- [ ] Testing
+
+Testing is important. Any testing framework is fine but personally prefer bash scripting to test out the function.
+
+- [ ] Better output format
+
+Print it properly? Probably it will be ideal that I could see obvious changes to show the border of 3x3 box.
+
+## No Code
+
+- [ ] documentation 
+
+Provide Documentation on each function on what it does. Please also provide documentation on elaboration on the algorithm especially for 'SudokuSolution()' and 'initialize()'
+
+# How to start contribute
+
+Please discuss in issues and I will assign the issues to you.
+Once it is assigned, 
+
+1. fork the repo
+2. open a draft Pull Request
+
+# Special thanks
+
+
+
diff --git a/sudoku b/sudoku
index ee2dd15..a0cea2b 100644
Binary files a/sudoku and b/sudoku differ
diff --git a/sudoku.cpp b/sudoku.cpp
index 458ca6e..d515250 100644
--- a/sudoku.cpp
+++ b/sudoku.cpp
@@ -146,7 +146,7 @@ bool Sudoku::GenerateSudoku()
                     std::shuffle(numbers.begin(), numbers.end(), std::mt19937{std::random_device{}()});
                     for (int number : numbers)
                     {
-                        if (isPlacable(row, col, Board, number))
+                        if (isPlacable(row, col, number))
                         {
                             // if (true){
                             Board[row][col] = number;
@@ -177,7 +177,7 @@ int Sudoku::SudokuSolution()
                 vector<int> numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9};
                 for (int number : numbers)
                 { 
-                    if (isPlacable(row, col, Board, number))
+                    if (isPlacable(row, col, number))
                     {
                         Board[row][col] = number; 
                         
@@ -227,28 +227,12 @@ int main()
 {
     Sudoku sudoku;
     sudoku.initialize(); 
-    vector<vector<int>> temp  =  vector<vector<int>>(9, vector<int>(9, 0));
-    
-    // cout<<"empty row 1 | col 1 | value "<<temp[1][1]<<endl;
-    // temp[1][1] = 0;
-    // cout<<"empty row 1 | col 2 | value "<<temp[1][2]<<endl;
-    // temp[1][2] = 0;
-    // cout<<"empty row 1 | col 3 | value "<<temp[1][3]<<endl;
-    // temp[1][3] = 0;
 
-    // temp[3] = {0,0,0,0,0,0,0,0,0};
-    // temp[4] = {0,0,0,0,0,0,0,0,0};
-    // temp[5] = {0,0,0,0,0,0,0,0,0};
- 
-    int ans = 0;
-    ans = sudoku.SudokuSolution();
-    cout<<"ans:"<<ans<<endl;
-    temp = sudoku.getBoard();
-    for (auto x : temp)
+    for (auto row : sudoku.getBoard())
     {
-        for (auto y : x)
+        for (auto val : row)
         {
-            cout << y << " | ";
+            cout << val << " | ";
         }
         cout << endl
              << "--------------------------------" << endl;