diff --git a/src/main/java/com/booleanuk/Scrabble.java b/src/main/java/com/booleanuk/Scrabble.java
index 88108a8..bdbffdb 100644
--- a/src/main/java/com/booleanuk/Scrabble.java
+++ b/src/main/java/com/booleanuk/Scrabble.java
@@ -1,12 +1,129 @@
 package com.booleanuk;
 
+import java.util.*;
+
 public class Scrabble {
-    public Scrabble(String word) {
+    private final String word;
 
+    public Scrabble(String word) {
+        this.word = word;
     }
 
     public int score() {
-        return -1;
+        List<Character> value_1 = new ArrayList<>(List.of('A', 'E', 'I', 'O', 'U', 'L', 'N', 'R', 'S', 'T')); //immutable to mutable list
+        List<Character> value_2 = List.of('D', 'G'); //immutable list
+        List<Character> value_3 = List.of('B', 'C', 'M', 'P');
+        List<Character> value_4 = List.of('F', 'H', 'V', 'W', 'Y');
+        List<Character> value_5 = List.of('K');
+        List<Character> value_8 = List.of('J', 'X');
+        List<Character> value_10 =List.of('Q', 'Z');
+
+        HashMap<Character, Integer> scores = new HashMap<>();
+        value_1.forEach(x -> scores.put(x, 1));
+        value_2.forEach(x -> scores.put(x, 2));
+        value_3.forEach(x -> scores.put(x, 3));
+        value_4.forEach(x -> scores.put(x, 4));
+        value_5.forEach(x -> scores.put(x, 5));
+        value_8.forEach(x -> scores.put(x, 8));
+        value_10.forEach(x -> scores.put(x, 10));
+
+        String wordToUpper = word.toUpperCase();
+        int wordMultiplier = 1;
+
+        if (wordToUpper.startsWith("[") && wordToUpper.endsWith("]")) {
+            String temp = wordToUpper.substring(1, wordToUpper.length() - 1);
+            if (temp.startsWith("{") && temp.endsWith("}")) {
+                wordMultiplier = 3 * 2;
+                wordToUpper = temp.substring(1, temp.length() - 1);
+            } else if (isSimpleWord(temp)) {
+                wordMultiplier = 3;
+                wordToUpper = temp;
+            }
+        } else if (wordToUpper.startsWith("{") && wordToUpper.endsWith("}")) {
+            String temp = wordToUpper.substring(1, wordToUpper.length() - 1);
+            if (temp.startsWith("[") && temp.endsWith("]")) {
+                wordMultiplier = 2 * 3;
+                wordToUpper = temp.substring(1, temp.length() - 1);
+            } else if (isSimpleWord(temp)) {
+                wordMultiplier = 2;
+                wordToUpper = temp;
+            } else if(!hasLetterMultiplyPattern(temp)) {
+                wordMultiplier = 2;
+                wordToUpper = temp;
+            }
+        }
+
+        int sum = 0;
+
+        for (int i = 0; i < wordToUpper.length(); i++) {
+            char current = wordToUpper.charAt(i);
+
+            int value;
+            int letterMultiplier = 1;
+
+            if (current == '{') {
+                if (i + 2 < wordToUpper.length() && wordToUpper.charAt(i + 2) == '}') {
+                    char letter = wordToUpper.charAt(i + 1);
+
+                    if (scores.containsKey(letter)) {
+                            value = scores.get(letter);
+                            letterMultiplier = 2;
+                            i += 2;
+                    } else {
+                        return 0;
+                    }
+                } else {
+                    return 0;
+                }
+            } else if (current == '[') {
+                if (i + 2 < wordToUpper.length() && wordToUpper.charAt(i + 2) == ']') {
+                    char letter = wordToUpper.charAt(i + 1);
+                    if (scores.get(letter) != null) {
+                        value = scores.get(letter);
+                        letterMultiplier = 3;
+                        i += 2;
+                    } else {
+                        return 0;
+                    }
+                } else {
+                    return 0;
+                }
+            } else if (current == '}' || current == ']') {
+                return 0;
+            } else {
+                if (scores.containsKey(current)) {
+                    value = scores.get(current);
+                } else {
+                    return 0;
+                }
+            }
+            sum += value * letterMultiplier;
+        }
+        return sum * wordMultiplier;
+    }
+
+    private boolean hasLetterMultiplyPattern (String word) {
+        boolean hasLetter = false;
+        boolean hasBracketsAfterLetter = false;
+        for (int i = 0; i < word.length(); i++) {
+            char c = word.charAt(i);
+            if (Character.isLetter(c)){
+                hasLetter = true;
+            } else if ((c == '}' || c == '{') && hasLetter && i < word.length() - 1) {
+                hasBracketsAfterLetter = true;
+            }
+        }
+        return hasLetter && hasBracketsAfterLetter;
     }
 
+    private boolean isSimpleWord(String s) {
+        for (char c : s.toCharArray()) {
+            if (c == '{'  || c == '}' || c == '[' || c == ']') {
+                return false;
+            }
+        }
+        return true;
+    }
 }
+
+