diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index aa7da15..894bf98 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
 add_executable(sudoku
+    ./sudoku_solver.cpp
     ./sudoku.cpp
 )
 
-target_include_directories(sudoku PUBLIC ${CMAKE_CURRENT_LIST_DIR})
diff --git a/src/sudoku.cpp b/src/sudoku.cpp
index 9294f97..4911f30 100644
--- a/src/sudoku.cpp
+++ b/src/sudoku.cpp
@@ -1,7 +1,47 @@
+#include "sudoku.hpp"
+#include <fstream>
 #include <iostream>
+#include <string>
+
+
+Sudoku::Sudoku(void) {
+    board.resize(9, std::vector<int>(9, -1));
+}
+
+void Sudoku::FillBoard(std::string filePath) {
+    std::ifstream sudokuFile(filePath);
+    if (!sudokuFile) {
+        std::cerr << "Error opening file: " << filePath << std::endl;
+        exit(1);
+    }
+    std::string line;
+    while (!sudokuFile.eof()) { 
+        sudokuFile >> line;
+        std::cout << line << std::endl; 
+    }
+
+}
+
+void Sudoku::Solve(void) {
+
+}
+
+bool Sudoku::IsBoardSolved(void) {
+    return true;
+}
+
+bool Sudoku::IsRowComplete(int row) {
+    return true;
+}
+
+bool Sudoku::IsColumnComplete(int column) {
+    return true;
+}
+
+std::vector<int> Sudoku::GetUnusedInRow(int row) {
+
+}
+
+std::vector<int> Sudoku::GetUnusedInColumn(int column) {
 
-int main(void) {
-    std::cout << "Sudoku started" << std::endl;
-    std::cout << "Sudoku ended" << std::endl;
-    return 0;
 }
diff --git a/src/sudoku.hpp b/src/sudoku.hpp
new file mode 100644
index 0000000..5bb8552
--- /dev/null
+++ b/src/sudoku.hpp
@@ -0,0 +1,21 @@
+#ifndef SUDOKU_HPP
+#define SUDOKU_HPP
+
+#include <string>
+#include <vector>
+
+class Sudoku {
+public:
+    Sudoku(void);
+    std::vector< std::vector<int> > board;
+    void FillBoard(std::string filePath);
+    void Solve(void);
+    bool IsBoardSolved(void);
+private:
+    bool IsRowComplete(int row);
+    bool IsColumnComplete(int column);
+    std::vector<int> GetUnusedInRow(int row);
+    std::vector<int> GetUnusedInColumn(int column);
+};
+
+#endif
diff --git a/src/sudoku_solver.cpp b/src/sudoku_solver.cpp
new file mode 100644
index 0000000..a325153
--- /dev/null
+++ b/src/sudoku_solver.cpp
@@ -0,0 +1,5 @@
+#include "sudoku.hpp"
+
+int main(void) {
+    return 0;
+}