diff --git a/src/model/__tests__/__snapshots__/puzzle-generator.test.ts.snap b/src/model/__tests__/__snapshots__/puzzle-generator.test.ts.snap
index c3bdc73..dbfcdd3 100644
--- a/src/model/__tests__/__snapshots__/puzzle-generator.test.ts.snap
+++ b/src/model/__tests__/__snapshots__/puzzle-generator.test.ts.snap
@@ -5,301 +5,301 @@ Array [
   Array [
     Object {
       "column": 0,
-      "letter": "H",
+      "letter": "W",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "F",
+      "letter": "G",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "N",
+      "letter": "B",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "O",
+      "letter": "B",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "R",
+      "letter": "X",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "A",
+      "letter": "V",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "S",
+      "letter": "K",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "D",
+      "letter": "L",
       "row": 0,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
     Object {
       "column": 0,
-      "letter": "P",
+      "letter": "G",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "D",
+      "letter": "H",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "M",
+      "letter": "H",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "U",
+      "letter": "G",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "P",
+      "letter": "D",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "X",
+      "letter": "K",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "X",
+      "letter": "L",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "C",
+      "letter": "S",
       "row": 1,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
     Object {
       "column": 0,
-      "letter": "E",
+      "letter": "T",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "F",
+      "letter": "J",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "F",
+      "letter": "X",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "V",
+      "letter": "U",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "P",
+      "letter": "F",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "E",
+      "letter": "P",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "X",
+      "letter": "G",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "T",
+      "letter": "H",
       "row": 2,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
     Object {
       "column": 0,
-      "letter": "K",
+      "letter": "L",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "D",
+      "letter": "W",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "S",
+      "letter": "T",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "F",
+      "letter": "E",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "C",
+      "letter": "X",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "J",
+      "letter": "P",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "Q",
+      "letter": "G",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "J",
+      "letter": "H",
       "row": 3,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
     Object {
       "column": 0,
-      "letter": "Q",
+      "letter": "M",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "B",
+      "letter": "F",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "S",
+      "letter": "C",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "P",
+      "letter": "F",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
       "letter": "W",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "G",
+      "letter": "X",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "K",
+      "letter": "D",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "M",
+      "letter": "D",
       "row": 4,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
     Object {
       "column": 0,
-      "letter": "C",
+      "letter": "H",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "B",
+      "letter": "S",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "Y",
+      "letter": "X",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "L",
+      "letter": "G",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "M",
+      "letter": "K",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "E",
+      "letter": "U",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "X",
+      "letter": "N",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "C",
+      "letter": "T",
       "row": 5,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
@@ -307,49 +307,49 @@ Array [
       "column": 0,
       "letter": "Z",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "F",
+      "letter": "X",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "P",
+      "letter": "I",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "Z",
+      "letter": "E",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "M",
+      "letter": "L",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "I",
+      "letter": "Q",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "G",
+      "letter": "O",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "Q",
+      "letter": "R",
       "row": 6,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
   Array [
@@ -357,49 +357,49 @@ Array [
       "column": 0,
       "letter": "E",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 1,
-      "letter": "C",
+      "letter": "Y",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 2,
-      "letter": "B",
+      "letter": "I",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 3,
-      "letter": "H",
+      "letter": "G",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 4,
-      "letter": "J",
+      "letter": "G",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 5,
-      "letter": "Q",
+      "letter": "X",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 6,
-      "letter": "K",
+      "letter": "W",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
     Object {
       "column": 7,
-      "letter": "X",
+      "letter": "A",
       "row": 7,
-      "updatedAt": "2017-07-14T02:40:00.000Z",
+      "updatedAt": 2017-07-14T02:40:00.000Z,
     },
   ],
 ]
diff --git a/src/model/__tests__/game-utils.test.ts b/src/model/__tests__/game-utils.test.ts
new file mode 100644
index 0000000..4c8098f
--- /dev/null
+++ b/src/model/__tests__/game-utils.test.ts
@@ -0,0 +1,23 @@
+import { mockMathRandom } from 'utils/mockMathRandom'
+import PuzzleGenerator from '../puzzle-generator'
+
+const noise = 'ABCDEFGHIJKLMNOPQRSTVWUXYZ'.split('')
+const solution = 'NORA'.toUpperCase().split('')
+
+beforeAll(() => {
+  mockMathRandom()
+})
+
+// isCorrectAnswer
+
+// didWin
+
+// didLoose
+
+describe('Puzzle', () => {
+  it('Should generate a 6 x 6 grid', () => {
+    const puzzle = new PuzzleGenerator(6, solution, noise)
+    expect(puzzle.grid.length).toEqual(6)
+    expect(puzzle.grid[0].length).toEqual(6)
+  })
+})
diff --git a/src/model/__tests__/puzzle-generator.test.ts b/src/model/__tests__/puzzle-generator.test.ts
index 211eaf4..1960f74 100644
--- a/src/model/__tests__/puzzle-generator.test.ts
+++ b/src/model/__tests__/puzzle-generator.test.ts
@@ -1,8 +1,13 @@
+import { mockMathRandom } from 'utils/mockMathRandom'
 import PuzzleGenerator from '../puzzle-generator'
 
 const noise = 'ABCDEFGHIJKLMNOPQRSTVWUXYZ'.split('')
 const solution = 'NORA'.toUpperCase().split('')
 
+beforeEach(() => {
+  mockMathRandom()
+})
+
 describe('Puzzle', () => {
   it('Should generate a 6 x 6 grid', () => {
     const puzzle = new PuzzleGenerator(6, solution, noise)
@@ -27,6 +32,12 @@ describe('Puzzle', () => {
   })
 })
 
+describe('removeSolutionLettersFrom()', () => {
+  const puzzle = new PuzzleGenerator(6, solution, noise)
+  puzzle.removeSolutionLettersFrom('NORABCD'.split(''))
+  expect(puzzle.noise).toEqual(['B', 'C', 'D'])
+})
+
 describe('calculateStepsToEdge()', () => {
   it('Should calculate steps to edge start at origin', () => {
     const puzzle = new PuzzleGenerator(6, solution, noise)
@@ -67,8 +78,27 @@ describe('updateIndices()', () => {
 })
 
 describe('applyTransformations()', () => {
-  it('Should ...', () => {
-    // const puzzle = new PuzzleGenerator(6, solution, noise)
-    //
+  it('Should do nothing on first tranformation', () => {
+    const puzzle = new PuzzleGenerator(4, solution, noise)
+    puzzle.applyRandomTransformation()
+    const str = puzzle.toString()
+    expect(str.startsWith('BLGA')).toBeTruthy()
+  })
+
+  it('Should rotate counterclockwise on second tranformation', () => {
+    const puzzle = new PuzzleGenerator(4, solution, noise)
+    puzzle.applyRandomTransformation()
+    puzzle.applyRandomTransformation()
+    const str = puzzle.toString()
+    expect(str.startsWith('ARKD')).toBeTruthy()
+  })
+
+  it('Should mirror horizontally on third tranformation', () => {
+    const puzzle = new PuzzleGenerator(4, solution, noise)
+    puzzle.applyRandomTransformation()
+    puzzle.applyRandomTransformation()
+    puzzle.applyRandomTransformation()
+    const str = puzzle.toString()
+    expect(str.endsWith('ARKD\n')).toBeTruthy()
   })
 })
diff --git a/src/model/puzzle-generator.ts b/src/model/puzzle-generator.ts
index 358b427..bab20a4 100644
--- a/src/model/puzzle-generator.ts
+++ b/src/model/puzzle-generator.ts
@@ -7,7 +7,7 @@ import {
 
 class PuzzleGenerator {
   public grid: GridType
-  private noise: string[]
+  public noise: string[]
 
   constructor(
     readonly size: number,
@@ -112,10 +112,10 @@ class PuzzleGenerator {
   public toString() {
     let s: string = ''
     this.grid.forEach(row => {
-      s += '\n'
       row.forEach(item => {
-        s += ' ' + item.letter
+        s += item.letter
       })
+      s += '\n'
     })
     return s
   }
diff --git a/src/setupTests.ts b/src/setupTests.ts
index 02a6589..4399959 100644
--- a/src/setupTests.ts
+++ b/src/setupTests.ts
@@ -2,4 +2,3 @@ import { mockDate } from './utils/mockDate'
 import { mockMathRandom } from './utils/mockMathRandom'
 
 mockDate()
-mockMathRandom()