diff --git a/csharp-scrabble-challenge.Main/Program.cs b/csharp-scrabble-challenge.Main/Program.cs
index 3751555..352f63f 100644
--- a/csharp-scrabble-challenge.Main/Program.cs
+++ b/csharp-scrabble-challenge.Main/Program.cs
@@ -1,2 +1,16 @@
 // See https://aka.ms/new-console-template for more information
-Console.WriteLine("Hello, World!");
+
+using csharp_scrabble_challenge.Main;
+
+Console.WriteLine("Welcome to Scrabble");
+Console.WriteLine("Enter a word and get the score! Add a {} or [] around a letter or multiple letters to multiply score by 2 or 3 respectively");
+Console.WriteLine("To exit press q and Enter.");
+while  (true)
+{
+    string word = Console.ReadLine();
+    if (word == "q") break;
+    Scrabble scrabble = new Scrabble(word);
+    Console.WriteLine($"{scrabble.score()}");
+}
+
+Console.WriteLine("Exiting... Thanks for playing!");
\ No newline at end of file
diff --git a/csharp-scrabble-challenge.Main/Scrabble.cs b/csharp-scrabble-challenge.Main/Scrabble.cs
index c1ea013..94e8e55 100644
--- a/csharp-scrabble-challenge.Main/Scrabble.cs
+++ b/csharp-scrabble-challenge.Main/Scrabble.cs
@@ -9,15 +9,83 @@ namespace csharp_scrabble_challenge.Main
 {
     public class Scrabble
     {
+        public string _word;
+        private Dictionary<char, int> _dictionary = new Dictionary<char, int>
+        {
+            { 'A', 1 },
+            { 'E', 1 },
+            { 'I', 1 },
+            { 'O', 1 },
+            { 'U', 1 },
+            { 'L', 1 },
+            { 'N', 1 },
+            { 'R', 1 },
+            { 'S', 1 },
+            { 'T', 1 },
+            { 'D', 2 },
+            { 'G', 2 },
+            { 'B', 3 },
+            { 'C', 3 },
+            { 'M', 3 },
+            { 'P', 3 },
+            { 'F', 4 },
+            { 'H', 4 },
+            { 'V', 4 },
+            { 'W', 4 },
+            { 'Y', 4 },
+            { 'K', 5 },
+            { 'J', 8 },
+            { 'X', 8 },
+            { 'Q', 10 },
+            { 'Z', 10 }
+        };
         public Scrabble(string word)
-        {            
-            //TODO: do something with the word variable
+        {
+            _word = word;
         }
 
         public int score()
         {
-            //TODO: score calculation code goes here
-            throw new NotImplementedException(); //TODO: Remove this line when the code has been written
+            int sum = 0;
+            int openCurly = 0;
+            int openHard = 0;
+            int BonusMultiplier = 1; // 1 -> no bonus, 2 -> double, 3 -> triple
+            foreach (char item in _word)
+            {
+                if (char.IsWhiteSpace(item)) return 0;
+                if (char.IsNumber(item)) return 0;
+                if (item == '{')
+                {
+                    openCurly++;
+                    BonusMultiplier = BonusMultiplier * 2;
+                }
+                else if (item == '[') 
+                {
+                    openHard++;
+                    BonusMultiplier = BonusMultiplier * 3; 
+                }
+                else if (item == '}')
+                {
+                    if (openCurly == 0) return 0;
+                    openCurly--;
+                    BonusMultiplier = BonusMultiplier / 2;
+                }
+                else if (item == ']') 
+                {
+                    if (openHard == 0) return 0;
+                    openHard--;
+                    BonusMultiplier = BonusMultiplier / 3;
+                }
+                else
+                {
+                    char letter = char.Parse(item.ToString().ToUpper());
+                    sum = sum + _dictionary[letter] * BonusMultiplier;
+                }
+
+               
+            }
+            if (openCurly > 0 || openHard > 0) return 0;
+            return sum;
         }
     }
 }
diff --git a/csharp-scrabble-challenge.Test/CoreTests.cs b/csharp-scrabble-challenge.Test/CoreTests.cs
index f42e402..ecdc8c0 100644
--- a/csharp-scrabble-challenge.Test/CoreTests.cs
+++ b/csharp-scrabble-challenge.Test/CoreTests.cs
@@ -5,7 +5,11 @@ namespace csharp_scrabble_challenge.Test
 {
     [TestFixture]
     public class CoreTests
-    {        
+    {
+        [TestCase("[{h}o1s{e}]", 0)] // error case (zero for errors)
+        [TestCase("{h}ous{e}", 13)]
+        [TestCase("[{h}ous{e}]", 39)]
+        [TestCase("[h}ous{e}]", 0)] //Error case (zero for errors)
         [TestCase("", 0)]
         [TestCase(" ", 0)]
         [TestCase(" \t\n", 0)]
@@ -17,7 +21,9 @@ public class CoreTests
         [TestCase("street", 6)]
         public void WordScoreTests(string word, int targetScore)
         {
-            Assert.AreEqual(this.GetWordScore(word), targetScore);
+            Scrabble scrabble = new Scrabble(word);
+
+            Assert.That(scrabble.score(), Is.EqualTo(targetScore));
         }
 
         private int GetWordScore(string word) => new Scrabble(word).score();
diff --git a/csharp-scrabble-challenge.Test/ExtensionTests.cs b/csharp-scrabble-challenge.Test/ExtensionTests.cs
index 8eb37dc..7b07bb6 100644
--- a/csharp-scrabble-challenge.Test/ExtensionTests.cs
+++ b/csharp-scrabble-challenge.Test/ExtensionTests.cs
@@ -18,6 +18,8 @@ public class ExtensionTests
         [TestCase("[quirky]", 66)] //extension triple word
         [TestCase("{OXyPHEnBUTaZoNE}", 82)]
         [TestCase("[OXyPHEnBUTaZoNE]", 123)]
+        [TestCase("A[Q]A", 32)]
+        [TestCase("{{A}}", 4)]
         public void ExtendedCriteriaTests(string word, int targetScore)
         {
             Assert.AreEqual(this.GetWordScore(word), targetScore);