diff --git a/Backtracking/cpp/N-Queen_Problem.cpp b/Backtracking/cpp/N-Queen_Problem.cpp
new file mode 100644
index 00000000..54f5d8ef
--- /dev/null
+++ b/Backtracking/cpp/N-Queen_Problem.cpp
@@ -0,0 +1,275 @@
+#include<iostream>
+#include<stdlib.h>
+#include<windows.h>
+#include<cstdlib>
+#include<cwchar>
+#include<iomanip>
+#include<conio.h>
+#include<dos.h>
+using namespace std;
+typedef struct _CONSOLE_FONT_INFOEX
+{
+    ULONG cbSize;
+    DWORD nFont;
+    COORD dwFontSize;
+    UINT  FontFamily;
+    UINT  FontWeight;
+    WCHAR FaceName[LF_FACESIZE];
+}CONSOLE_FONT_INFOEX, *PCONSOLE_FONT_INFOEX;
+#ifdef __cplusplus
+extern "C" {
+#endif
+BOOL WINAPI SetCurrentConsoleFontEx(HANDLE hConsoleOutput, BOOL bMaximumWindow, PCONSOLE_FONT_INFOEX
+lpConsoleCurrentFontEx);
+#ifdef __cplusplus
+}
+#endif
+int n;
+//int** board=new int*[n];
+int board[15][15];
+void printboard()
+{
+	cout<<setw(70)<<"1.0 game";
+	cout<<"\n\n\n";
+	for(int i=0;i<n;i++)
+	{
+		//cout<<"\t\t\t\t\t";
+		cout<<setw(50);
+
+		for(int j=0;j<n;j++)
+		{
+			cout<<"|\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb|";
+		}
+		cout<<"\n\n";
+		//cout<<"\t\t\t\t\t";
+		cout<<setw(44);
+		for(int j=0;j<n;j++)
+		{
+
+			cout<<"|     "<<board[i][j]<<"    |";
+		}
+		cout<<"\n\n";
+
+	}
+	//cout<<"\t\t\t\t\t";
+	cout<<setw(50);
+	for(int j=0;j<n;j++)
+		{
+			cout<<"|\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb\xdb|";
+		}
+
+
+}
+bool completecheck()
+{
+	int c=0;
+	for(int i=0;i<n;i++)
+	{
+		for(int j=0;j<n;j++)
+		{
+			if(board[i][j]==1)
+			{
+				c++;
+			}
+		}
+	}
+	if(c==n)
+	{
+		return 0;
+	}
+	else
+	{
+		return 1;
+
+	}
+}
+bool check(int r,int c)
+{
+	for(int j=0;j<n;j++)
+	{
+		if(board[r][j]==1)
+		{
+			return 0;
+		}
+	}
+	for(int i=0;i<n;i++)
+	{
+		if(board[i][c]==1)
+		{
+			return 0;
+		}
+	}
+	for(int i=0;i<n;i++)
+	{
+		for(int j=0;j<n;j++)
+		{
+			if(r+j==i+c||r-j==i-c)
+			{
+				if(board[i][j]==1)
+				{
+					return 0;
+				}
+			}
+		}
+	}
+	return 1;
+}
+void put(int r,int c)
+{
+
+	for(int i=0;i<n;i++)
+	{
+		for(int j=0;j<n;j++)
+		{
+			board[r][c]=1;
+		}
+	}
+}
+void remove(int r,int c)
+{
+	if(board[r][c]==1)
+	{
+		for(int i=0;i<n;i++)
+		{
+			for(int j=0;j<n;j++)
+			{
+				board[r][c]=0;
+			}
+		}
+	}
+	else
+	{
+		cout<<"You can only remove 1 if it is already at that position\n";
+	}
+
+}
+
+int main()
+{
+
+	system("color 02");
+	CONSOLE_FONT_INFOEX cfi;
+cfi.cbSize = sizeof(cfi);
+cfi.nFont = 0;
+cfi.dwFontSize.X = 0;                   // Width of each character in the font
+cfi.dwFontSize.Y = 200;                  // Height
+cfi.FontFamily = FF_DONTCARE;
+cfi.FontWeight = FW_NORMAL;
+std::wcscpy(cfi.FaceName, L"Consolas"); // Choose your font
+SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &cfi);
+	cout<<setw(12)<<"1.0 GAME\n";
+	cout<<"LOADING";
+	for(int i=0;i<8;i++)
+	{
+		cout<<".";
+		Sleep(500);
+	}
+	cout<<"\n";
+	system("CLS");
+	cfi.dwFontSize.X = 0;                   // Width of each character in the font
+cfi.dwFontSize.Y = 35;
+SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &cfi);
+		cout<<"INSTRUCTIONS\n";
+		cout<<"->Put the 1 such that\n\t->It does not repeat in same row and column.\n\t->and it also should not be repeated diagonally.\n";
+		cout<<"->Game can be win if there is 1 in every row.\n";
+		cout<<"Press enter to continue\n";
+		cin.ignore();
+		system("CLS");
+		int level;
+		cout<<"SELECT LEVEL\n";
+		cout<<"\n1.Easy\n2.Hard\n";
+		cin>>level;
+		system("CLS");
+		cout<<"\n ";
+		cfi.dwFontSize.X = 0;                   // Width of each character in the font
+cfi.dwFontSize.Y = 200;                  // Height
+		SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &cfi);
+		cout<<setw(10)<<"ARE YOU READY?";
+		Sleep(1000);
+		system("CLS");
+		for(int i=3;i>=1;i--)
+		{
+			cout<<"\n\t"<<i;
+			Sleep(800);
+			system("CLS");
+		}
+		system("CLS");
+		switch(level)
+		{
+			case 1:
+				n=4;
+				break;
+			case 2:
+				n=8;
+				break;
+		}
+//		for(int i=0;i<n;i++)
+//	board[i]=new int[n];
+
+		for(int i=0;i<n;i++)
+		{
+			for(int j=0;j<n;j++)
+			{
+				board[i][j]=0;
+			}
+		}
+		cfi.dwFontSize.X = 0;                   // Width of each character in the font
+cfi.dwFontSize.Y = 20;                  // Height
+		SetCurrentConsoleFontEx(GetStdHandle(STD_OUTPUT_HANDLE), FALSE, &cfi);
+		while(completecheck())
+	{
+		printboard();
+		int command;
+
+		cout<<"\n1.Put the 1\n";
+		cout<<"2.Remove the 1\n";
+		cout<<"3.Quit\n";
+		cin>>command;
+
+		switch(command)
+		{
+			case 1:
+				{
+
+					int rowno,columnno;
+					cout<<"enter the place number you want to put 1:\n";
+					cout<<"\n enter in format rowno columnno\n";
+					cin>>rowno>>columnno;
+					if(check(rowno-1,columnno-1))
+					{
+						put(rowno-1,columnno-1);
+
+					}
+					else
+					{
+						cout<<"you cannot put 1 here";
+						Sleep(800);
+					}
+					break;
+				}
+			case 2:
+				{
+					int rowno,columnno;
+					cout<<"enter the place number you want to remove 1:\n";
+					cout<<"\n enter in format rowno columnno\n";
+					cin>>rowno>>columnno;
+					remove(rowno-1,columnno-1);
+					break;
+				}
+				case 3:
+					exit(0);
+				default:
+					cout<<"choose correct option\n";
+					break;
+		}
+		system("CLS");
+	}
+	printboard();
+	cout<<"\nYOU WIN\n";
+	cout<<"GAME OVER.....";
+//	for(int i=0;i<n;i++)
+//	delete[] board[i];
+//	delete[] board;
+
+	return 0;
+}