diff --git a/src/main/java/de/tims/fleetstorm/ai/Logic.java b/src/main/java/de/tims/fleetstorm/ai/Logic.java
index 359fcbd..5c4be84 100644
--- a/src/main/java/de/tims/fleetstorm/ai/Logic.java
+++ b/src/main/java/de/tims/fleetstorm/ai/Logic.java
@@ -1,9 +1,232 @@
 package de.tims.fleetstorm.ai;
 
+import java.util.ArrayList;
+import java.util.Random;
+
+import de.tims.fleetstorm.matchfield.Coordinate;
+import de.tims.fleetstorm.matchfield.Matchfield;
+
 public class Logic {
 
-	public int[] chooseField() {
-		return new int[] {};
+	private Matchfield matchfield;
+	private ArrayList<Coordinate> everySecondField;
+
+	private Coordinate lastShot;
+	private Coordinate target;
+	private boolean foundShip;
+	private boolean clearedAbove;
+	private boolean clearedBelow;
+	private boolean clearedRight;
+	private boolean clearedLeft;
+
+	public Logic() {
+		foundShip = false;
+		clearedAbove = false;
+		clearedBelow = false;
+		clearedRight = false;
+		clearedLeft = false;
+	}
+
+	public Coordinate chooseField() {
+		Coordinate out;
+
+		if (foundShip) {
+			// Clear Y-Axis
+			if (!clearedAbove) {
+				target = matchfield.getAbove(target);
+				out = target;
+				if (target == null || target.getState() == Coordinate.EMPTY) {
+					clearedAbove = true;
+					target = lastShot;
+				}
+				return out;
+			}
+
+			if (!clearedBelow) {
+				target = matchfield.getBelow(target);
+				out = target;
+				if (target == null || target.getState() == Coordinate.EMPTY) {
+					clearedBelow = true;
+					target = lastShot;
+				}
+				isShipOnYAxis();
+				return out;
+			}
+
+			// Clear x-Axis
+			if (!clearedRight) {
+				target = matchfield.getRight(target);
+				out = target;
+				if (target == null || target.getState() == Coordinate.EMPTY) {
+					clearedRight = true;
+					target = lastShot;
+				}
+				return out;
+			}
+
+			if (!clearedLeft) {
+				target = matchfield.getLeft(target);
+				out = target;
+				if (target == null || target.getState() == Coordinate.EMPTY) {
+					clearedLeft = true;
+					target = lastShot;
+				}
+				sinkShip();
+				return out;
+			}
+		}
+
+		ArrayList<Coordinate> possibleFields = new ArrayList<Coordinate>();
+		for (int i = 0; i < everySecondField.size(); i++) {
+			if (everySecondField.get(i).getState() != Coordinate.SHOT
+					&& everySecondField.get(i).getState() != Coordinate.HIT) {
+				possibleFields.add(everySecondField.get(i));
+			}
+		}
+		Random randy = new Random();
+		lastShot = possibleFields.get(randy.nextInt(possibleFields.size()));
+		target = possibleFields.get(randy.nextInt(possibleFields.size()));
+		if (lastShot.getState() == Coordinate.SHIP) {
+			foundShip = true;
+		}
+		return lastShot;
+	}
+
+	public void isShipOnYAxis() {
+		if ((clearedAbove && clearedBelow) && ((matchfield.getAbove(lastShot) == null
+				|| (matchfield.getAbove(lastShot).getState() == Coordinate.HIT))
+				|| (matchfield.getBelow(lastShot) == null
+						|| (matchfield.getBelow(lastShot).getState() == Coordinate.HIT)))) {
+			clearedLeft = true;
+			clearedRight = true;
+			sinkShip();
+		}
+	}
+
+	public ArrayList<Coordinate> getEverySecondField() {
+		ArrayList<Coordinate> out = new ArrayList<Coordinate>();
+		for (int x = 0; x < Math.sqrt(this.matchfield.getSize()); x++) {
+			for (int y = 0; y < Math.sqrt(this.matchfield.getSize()); y++) {
+				if ((x % 2 == 0 && y % 2 == 0) || (x % 2 == 1 && y % 2 == 1)) {
+					out.add(this.matchfield.getField(x, y));
+				}
+			}
+		}
+		return out;
 	}
 
+	public void findShip() {
+		if (lastShot.getState() == Coordinate.HIT) {
+			foundShip = true;
+		}
+	}
+
+	public void sinkShip() {
+		if (foundShip && clearedAbove && clearedBelow && clearedLeft && clearedRight) {
+			this.foundShip = false;
+			this.clearedAbove = false;
+			this.clearedBelow = false;
+			this.clearedLeft = false;
+			this.clearedRight = false;
+		}
+	}
+
+	public void clearAbove(Coordinate shot) {
+		target = matchfield.getAbove(shot);
+		if (target.getState() == Coordinate.EMPTY) {
+			clearedAbove = true;
+		}
+	}
+
+	public void clearBelow(Coordinate shot) {
+		target = matchfield.getBelow(shot);
+		if (target.getState() == Coordinate.EMPTY) {
+			clearedBelow = true;
+		}
+	}
+
+	public void clearRight(Coordinate shot) {
+		target = matchfield.getRight(shot);
+		if (target.getState() == Coordinate.EMPTY) {
+			clearedRight = true;
+		}
+	}
+
+	public void clearLeft(Coordinate shot) {
+		target = matchfield.getLeft(shot);
+		if (target.getState() == Coordinate.EMPTY) {
+			clearedLeft = true;
+		}
+	}
+
+	// Getter And Setter
+
+	public void setEverySecondField(ArrayList<Coordinate> everySecondField) {
+		this.everySecondField = everySecondField;
+	}
+
+	public void setLastShot(Coordinate coordinate) {
+		lastShot = this.matchfield.getField(coordinate);
+	}
+
+	public Coordinate getLastShot() {
+		return lastShot;
+	}
+
+	public void setFoundShip(boolean b) {
+		this.foundShip = b;
+	}
+
+	public boolean getFoundShip() {
+		return this.foundShip;
+	}
+
+	public void setClearedAbove(boolean b) {
+		this.clearedAbove = b;
+	}
+
+	public boolean getClearedAbove() {
+		return this.clearedAbove;
+	}
+
+	public void setClearedBelow(boolean b) {
+		this.clearedBelow = b;
+	}
+
+	public boolean getClearedBelow() {
+		return this.clearedBelow;
+	}
+
+	public void setClearedRight(boolean b) {
+		this.clearedRight = b;
+	}
+
+	public boolean getClearedRight() {
+		return this.clearedRight;
+	}
+
+	public void setClearedLeft(boolean b) {
+		this.clearedLeft = b;
+	}
+
+	public boolean getClearedLeft() {
+		return this.clearedLeft;
+	}
+
+	public void setTarget(Coordinate target) {
+		this.target = target;
+	}
+
+	public Coordinate getTarget() {
+		return target;
+	}
+
+	public void setMatchfield(Matchfield matchfield) {
+		this.matchfield = matchfield;
+		this.everySecondField = getEverySecondField();
+	}
+
+	public Matchfield getMatchfield() {
+		return matchfield;
+	}
 }
diff --git a/src/main/java/de/tims/fleetstorm/gui/GameLogic.java b/src/main/java/de/tims/fleetstorm/gui/GameLogic.java
new file mode 100644
index 0000000..2bc34d5
--- /dev/null
+++ b/src/main/java/de/tims/fleetstorm/gui/GameLogic.java
@@ -0,0 +1,268 @@
+package de.tims.fleetstorm.gui;
+
+import java.awt.BorderLayout;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.SwingConstants;
+import javax.swing.border.MatteBorder;
+
+import de.tims.fleetstorm.ai.Logic;
+import de.tims.fleetstorm.matchfield.Coordinate;
+import de.tims.fleetstorm.matchfield.Matchfield;
+
+public class GameLogic extends JPanel {
+
+	// GameManager stuff
+	private int gameState;
+	private Matchfield matchfield;
+	private Matchfield enemyMatchfield;
+	private int matchfieldSize = 10;
+	private boolean playerMove;
+	private Logic aiLogic;
+
+	public static final int PREPARATION = 1;
+	public static final int RUNNING = 2;
+	public static final int GAME_OVER = 3;
+
+	// GUI stuff
+	private ArrayList<JPanel> playerFields;
+	private ArrayList<JPanel> enemyFields;
+
+	public GameLogic(int gapToFrameBorderX, int gapToFrameBorderY, int fieldWidth, int spaceBetween) {
+		this.playerFields = new ArrayList<>();
+		this.enemyFields = new ArrayList<>();
+
+		setSize(640, 480);
+
+		fieldWrapper = new JPanel();
+		fieldWrapper.setBounds(10, 11, 305, 458);
+		fieldWrapper.setLayout(null);
+		setLayout(null);
+		add(fieldWrapper);
+
+		enemyFieldWrapper = new JPanel();
+		enemyFieldWrapper.setLayout(null);
+		enemyFieldWrapper.setBounds(326, 11, 305, 458);
+		add(enemyFieldWrapper);
+
+		this.generateFieldsForGUI(gapToFrameBorderX, gapToFrameBorderY, fieldWidth, spaceBetween, fieldWrapper,
+				this.playerFields, false);
+
+		JLabel ownFieldLabel = new JLabel("Eigenes Spielfeld");
+		ownFieldLabel.setBounds(10, 11, 114, 14);
+		fieldWrapper.add(ownFieldLabel);
+		this.generateFieldsForGUI(gapToFrameBorderX, gapToFrameBorderY, fieldWidth, spaceBetween, enemyFieldWrapper,
+				this.enemyFields, true);
+
+		JLabel enemyFieldLabel = new JLabel("Gegnerisches Spielfeld");
+		enemyFieldLabel.setBounds(10, 11, 168, 14);
+		enemyFieldWrapper.add(enemyFieldLabel);
+	}
+
+	private void generateFieldsForGUI(int gapToFrameBorderX, int gapToFrameBorderY, int fieldWidth, int spaceBetween,
+			JPanel panel, ArrayList<JPanel> fields, boolean registerMouseListener) {
+
+		for (int x = 0; x < this.matchfieldSize; x++) {
+			for (int y = 0; y < this.matchfieldSize; y++) {
+				JPanel field = new JPanel();
+
+				int xPos = gapToFrameBorderX + x * fieldWidth + (x * spaceBetween);
+				int yPos = gapToFrameBorderY + y * fieldWidth + (y * spaceBetween);
+
+				field.setBounds(xPos, yPos, fieldWidth, fieldWidth);
+				field.setBorder(new MatteBorder(1, 1, 1, 1, (Color) new Color(0, 0, 0)));
+				field.setName(x + ":" + y);
+
+				fields.add(field);
+				panel.add(field);
+
+				if (!registerMouseListener)
+					continue;
+
+				field.addMouseListener(new MouseAdapter() {
+
+					public void mouseClicked(MouseEvent e) {
+						int[] coords = getCoordinateFromLabel(field);
+						int coordX = coords[0];
+						int coordY = coords[1];
+
+						Coordinate chosenField = enemyMatchfield.getField(coordX, coordY);
+
+						boolean shotSuccess = chosenField.shoot();
+
+						boolean areAllShipsHit = enemyMatchfield.areAllShipsHit();
+						if (areAllShipsHit) {
+							gameOver(true);
+							return;
+						}
+
+						if (shotSuccess && chosenField.getState() != Coordinate.HIT) {
+							nextMove(false);
+						} else {
+							nextMove(true);
+						}
+
+					}
+				});
+
+			}
+		}
+	}
+
+	private JLabel getXLabel() {
+		JLabel x = new JLabel("x");
+		x.setForeground(Color.WHITE);
+		return x;
+	}
+
+	private int[] getCoordinateFromLabel(JPanel panel) {
+		String panelName = panel.getName();
+		String[] panelNameSplit = panelName.split(":");
+		int coordX = Integer.parseInt(panelNameSplit[0]);
+		int coordY = Integer.parseInt(panelNameSplit[1]);
+		return new int[] { coordX, coordY };
+	}
+
+	private void updateFields() {
+		this.updateField(enemyMatchfield, this.enemyFields);
+		this.updateField(matchfield, this.playerFields);
+	}
+
+	private void updateField(Matchfield matchfield, ArrayList<JPanel> fields) {
+
+		for (JPanel coordinatePanel : fields) {
+			int[] coords = getCoordinateFromLabel(coordinatePanel);
+			int coordX = coords[0];
+			int coordY = coords[1];
+
+			// reset field
+			coordinatePanel.setBackground(null);
+			coordinatePanel.removeAll();
+
+			int state = matchfield.getField(coordX, coordY).getState();
+
+			switch (state) {
+			case Coordinate.SHIP:
+				if (playerMove)
+					coordinatePanel.setBackground(new Color(91, 58, 41));
+				break;
+			case Coordinate.SHOT:
+				coordinatePanel.setBackground(new Color(0, 94, 184));
+				break;
+			case Coordinate.HIT:
+				coordinatePanel.setBackground(new Color(91, 58, 41));
+				coordinatePanel.add(getXLabel());
+				break;
+			}
+
+			coordinatePanel.revalidate();
+			coordinatePanel.repaint();
+		}
+
+	}
+
+	/**
+	 * This function is only for testing
+	 */
+	private static GameLogic gui;
+	private JPanel fieldWrapper;
+	private JPanel enemyFieldWrapper;
+
+	public static void main(String[] args) {
+		JFrame frame = new JFrame("Test GUI");
+		gui = new GameLogic(12, 35, 25, 1);
+		frame.setContentPane(gui);
+		frame.setSize(640, 480);
+		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		frame.setResizable(true);
+		frame.setVisible(true);
+
+		gui.start(false);
+	}
+
+	public void start(boolean test) {
+		this.gameState = GameLogic.PREPARATION;
+		this.playerMove = true;
+
+		// create player matchfield and set ships
+		this.matchfield = new Matchfield(matchfieldSize);
+		this.matchfield.createMatchfield();
+		this.matchfield.setShip(new Coordinate(4, 6), 2, 0);
+		this.matchfield.setShip(new Coordinate(1, 3), 3, 0);
+		this.matchfield.setShip(new Coordinate(9, 1), 4, 1);
+		this.matchfield.setShip(new Coordinate(0, 0), 5, 0);
+
+		this.aiLogic = new Logic();
+		this.aiLogic.setMatchfield(this.matchfield);
+
+		// create enemy matchfield, set ships and initialize AI (with player's
+		// matchfield)
+		this.enemyMatchfield = new Matchfield(matchfieldSize);
+		this.enemyMatchfield.createMatchfield();
+		this.enemyMatchfield.setShip(new Coordinate(8, 9), 2, 0);
+		this.enemyMatchfield.setShip(new Coordinate(0, 2), 3, 1);
+		this.enemyMatchfield.setShip(new Coordinate(7, 0), 4, 1);
+		this.enemyMatchfield.setShip(new Coordinate(3, 6), 5, 0);
+
+		// enter game loop
+		this.gameState = GameLogic.RUNNING;
+		if (!test)
+			this.nextMove(true);
+	}
+
+	public void nextMove(boolean playerMove) {
+		this.playerMove = playerMove;
+
+		if (this.playerMove) {
+			gui.updateFields();
+			// waiting here for mouse click event....
+		} else {
+
+			Coordinate aiChosenField = null;
+			while (aiChosenField == null) {
+				aiChosenField = this.aiLogic.chooseField();
+			}
+
+			aiChosenField.shoot();
+
+			gui.updateFields();
+
+			boolean areAllShipsHit = this.matchfield.areAllShipsHit();
+			if (areAllShipsHit) {
+				this.gameOver(false);
+				return;
+			}
+
+			boolean aiHasNextMove = aiChosenField.getState() != Coordinate.HIT;
+			this.nextMove(aiHasNextMove);
+		}
+
+	}
+
+	protected void gameOver(boolean playerWinner) {
+		this.gameState = GameLogic.GAME_OVER;
+
+		this.removeAll();
+		this.setLayout(new BorderLayout());
+
+		JLabel wonLabel = new JLabel(playerWinner ? "Du hast gewonnen!" : "Du hast verloren!");
+		wonLabel.setHorizontalAlignment(SwingConstants.CENTER);
+		wonLabel.setVerticalAlignment(SwingConstants.CENTER);
+		wonLabel.setFont(new Font("Tahoma", Font.BOLD, 18));
+		this.add(wonLabel, SwingConstants.CENTER);
+
+		this.revalidate();
+		this.repaint();
+	}
+
+	public int getGameState() {
+		return gameState;
+	}
+}
diff --git a/src/main/java/de/tims/fleetstorm/matchfield/Coordinate.java b/src/main/java/de/tims/fleetstorm/matchfield/Coordinate.java
new file mode 100644
index 0000000..ede9574
--- /dev/null
+++ b/src/main/java/de/tims/fleetstorm/matchfield/Coordinate.java
@@ -0,0 +1,61 @@
+package de.tims.fleetstorm.matchfield;
+
+public class Coordinate {
+	private int x;
+	private int y;
+	private int state;
+
+	public static final int EMPTY = 0;
+	public static final int SHIP = 1;
+	public static final int SHOT = 2;
+	public static final int HIT = 3;
+
+	public Coordinate(int x, int y) {
+		this.x = x;
+		this.y = y;
+		this.state = 0;
+	}
+
+	public Integer getX() {
+		return x;
+	}
+
+	public Integer getY() {
+		return y;
+	}
+
+	public int getState() {
+		return this.state;
+	}
+
+	public void setState(int state) {
+		this.state = state;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (!(obj instanceof Coordinate)) {
+			return false;
+		}
+		return this.x == ((Coordinate) obj).getX() && this.y == ((Coordinate) obj).getY();
+	}
+
+	public void print() {
+		System.out.println("X = " + this.x + ", Y = " + this.y + ", State = " + this.state);
+	}
+
+	public boolean shoot() {
+		if (this.state == Coordinate.SHOT || this.state == Coordinate.HIT)
+			return false;
+
+		if (this.state == Coordinate.SHIP) {
+			this.state = Coordinate.HIT;
+			return true;
+		}
+
+		this.state = Coordinate.SHOT;
+
+		return true;
+	}
+
+}
diff --git a/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java b/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java
new file mode 100644
index 0000000..cca91c9
--- /dev/null
+++ b/src/main/java/de/tims/fleetstorm/matchfield/Matchfield.java
@@ -0,0 +1,113 @@
+package de.tims.fleetstorm.matchfield;
+
+public class Matchfield {
+
+	private Coordinate[][] matchfield;
+	private int size;
+
+	public Matchfield(int size) {
+		this.size = size;
+		this.matchfield = new Coordinate[this.size][this.size];
+	}
+
+	public Coordinate[][] createMatchfield() {
+		for (int i = 0; i < size; i++) {
+			for (int j = 0; j < size; j++) {
+				this.matchfield[i][j] = new Coordinate(i, j);
+			}
+		}
+
+		return this.matchfield;
+	}
+
+	public int getSize() {
+		return this.matchfield.length * this.matchfield[0].length;
+	}
+
+	public int getState(int x, int y) {
+		return this.matchfield[x][y].getState();
+	}
+
+	public void setState(int x, int y, int state) {
+		this.matchfield[x][y].setState(state);
+	}
+
+	public void setState(Coordinate coordinate, int state) {
+		this.matchfield[coordinate.getX()][coordinate.getY()].setState(state);
+	}
+
+	public Coordinate getField(Coordinate coordinate) {
+		return matchfield[coordinate.getX()][coordinate.getY()];
+	}
+
+	public Coordinate getField(int x, int y) {
+		return this.matchfield[x][y];
+	}
+
+	public Coordinate getRight(Coordinate center) {
+		if (center.getX() == matchfield.length - 1) {
+			return null;
+		}
+		return this.matchfield[center.getX() + 1][center.getY()];
+	}
+
+	public Coordinate getLeft(Coordinate center) {
+		if (center.getX() == 0) {
+			return null;
+		}
+		return this.matchfield[center.getX() - 1][center.getY()];
+	}
+
+	public Coordinate getAbove(Coordinate center) {
+		if (center.getY() == matchfield.length - 1) {
+			return null;
+		}
+		return matchfield[center.getX()][center.getY() + 1];
+	}
+
+	public Coordinate getBelow(Coordinate center) {
+		if (center.getY() == 0) {
+			return null;
+		}
+		return matchfield[center.getX()][center.getY() - 1];
+	}
+
+	/**
+	 * direction 0 => x axis (to the right) direction 1 => y axis (to the bottom)
+	 */
+	public boolean setShip(Coordinate coordinate, int length, int direction) {
+
+		for (int i = 0; i < length; i++) {
+
+			Coordinate field = this.getField(coordinate);
+			if (field.getState() == Coordinate.SHIP)
+				return false;
+
+			field.setState(Coordinate.SHIP);
+			if (direction == 0)
+				coordinate = this.getRight(coordinate);
+			if (direction == 1)
+				coordinate = this.getAbove(coordinate);
+
+			if (coordinate == null)
+				return false;
+		}
+
+		return true;
+	}
+
+	public boolean areAllShipsHit() {
+		int shipCounter = 0;
+
+		for (int i = 0; i < size; i++) {
+			for (int j = 0; j < size; j++) {
+				int fieldState = this.matchfield[i][j].getState();
+				if (fieldState == Coordinate.SHIP)
+					shipCounter++;
+			}
+		}
+
+		return shipCounter == 0;
+	}
+
+}
diff --git a/src/test/java/de/tims/fleetstorm/ai/LogicTest.java b/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
index 76fe7f2..79935b5 100644
--- a/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
+++ b/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
@@ -1,16 +1,376 @@
 package de.tims.fleetstorm.ai;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+import java.util.ArrayList;
+
 import org.junit.jupiter.api.Test;
 
+import de.tims.fleetstorm.matchfield.Coordinate;
+import de.tims.fleetstorm.matchfield.Matchfield;
+
 class LogicTest {
-	Logic logic = new Logic();
 
 	@Test
-	void testFielIsNotNull() {
-		int[] calcResult = logic.chooseField();
+	void testFieldIsNotNull() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 5;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+		// ArrayList<Coordinate> everySecondField = logic.getEverySecondField();
+
+		Coordinate calcResult = logic.chooseField();
 		assertNotNull(calcResult);
 	}
 
+	@Test
+	void testChoosenFieldHasNotStateShot() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 5;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+
+		ArrayList<Coordinate> everySecondField = logic.getEverySecondField();
+		for (int i = 0; i < everySecondField.size(); i++) {
+			everySecondField.get(i).setState(Coordinate.SHOT);
+		}
+		matchfield.setState(2, 2, Coordinate.EMPTY);
+		logic.setEverySecondField(everySecondField);
+
+		int calcState = logic.chooseField().getState();
+		assertNotEquals(calcState, Coordinate.SHOT);
+	}
+
+	@Test
+	void testGetEverySecondField() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+
+		ArrayList<Coordinate> everySecondField = logic.getEverySecondField();
+		ArrayList<Coordinate> expectedResult = new ArrayList<Coordinate>();
+
+		expectedResult.add(new Coordinate(0, 0));
+		expectedResult.add(new Coordinate(0, 2));
+		expectedResult.add(new Coordinate(1, 1));
+		expectedResult.add(new Coordinate(1, 3));
+		expectedResult.add(new Coordinate(2, 0));
+		expectedResult.add(new Coordinate(2, 2));
+		expectedResult.add(new Coordinate(3, 1));
+		expectedResult.add(new Coordinate(3, 3));
+
+		assertEquals(everySecondField, expectedResult);
+	}
+
+	@Test
+	void testGetAndSetLastShot() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+
+		Coordinate expectedResult = new Coordinate(2, 2);
+		logic.setLastShot(expectedResult);
+		Coordinate result = logic.getLastShot();
+
+		assertEquals(result, expectedResult);
+	}
+
+	@Test
+	void testSetMatchfield() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+
+		Matchfield result = logic.getMatchfield();
+		assertEquals(result, null);
+		logic.setMatchfield(matchfield);
+		result = logic.getMatchfield();
+		assertNotNull(result);
+	}
+
+	@Test
+	void testFindShip() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+
+		logic.setLastShot(new Coordinate(2, 2));
+		logic.getLastShot().setState(Coordinate.HIT);
+		logic.findShip();
+		assertEquals(logic.getFoundShip(), true);
+	}
+
+	@Test
+	void testGetAndsetFoundShip() {
+		Logic logic = new Logic();
+		logic.setFoundShip(true);
+		assertEquals(logic.getFoundShip(), true);
+	}
+
+	@Test
+	void testClearAbove() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		Coordinate shot = new Coordinate(2, 2);
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(shot);
+		matchfield.getField(shot).setState(Coordinate.EMPTY);
+
+		logic.clearAbove(shot);
+
+		assertEquals(logic.getClearedAbove(), true);
+	}
+
+	@Test
+	void testClearBelow() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		Coordinate shot = new Coordinate(2, 2);
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(shot);
+		matchfield.getField(shot).setState(Coordinate.EMPTY);
+
+		logic.clearBelow(shot);
+
+		assertEquals(logic.getClearedBelow(), true);
+	}
+
+	@Test
+	void testClearRight() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		Coordinate shot = new Coordinate(2, 2);
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(shot);
+		matchfield.getField(shot).setState(Coordinate.EMPTY);
+
+		logic.clearRight(shot);
+
+		assertEquals(logic.getClearedRight(), true);
+	}
+
+	@Test
+	void testClearLeft() {
+		Logic logic = new Logic();
+		Matchfield matchfield;
+		Coordinate shot = new Coordinate(2, 2);
+		int size = 4;
+		matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(shot);
+		matchfield.getField(shot).setState(Coordinate.EMPTY);
+
+		logic.clearLeft(shot);
+
+		assertEquals(logic.getClearedLeft(), true);
+	}
+
+	@Test
+	void testConstructor() {
+		Logic logic = new Logic();
+
+		assertEquals(logic.getFoundShip(), false);
+		assertEquals(logic.getClearedAbove(), false);
+		assertEquals(logic.getClearedBelow(), false);
+		assertEquals(logic.getClearedLeft(), false);
+		assertEquals(logic.getClearedRight(), false);
+	}
+
+	@Test
+	void testSetterClearedAbove() {
+		Logic logic = new Logic();
+		logic.setClearedAbove(true);
+
+		assertEquals(logic.getClearedAbove(), true);
+	}
+
+	@Test
+	void testSetterClearedBelow() {
+		Logic logic = new Logic();
+		logic.setClearedBelow(true);
+
+		assertEquals(logic.getClearedBelow(), true);
+	}
+
+	@Test
+	void testSetterClearedRight() {
+		Logic logic = new Logic();
+		logic.setClearedRight(true);
+
+		assertEquals(logic.getClearedRight(), true);
+	}
+
+	@Test
+	void testSetterClearedLeft() {
+		Logic logic = new Logic();
+		logic.setClearedLeft(true);
+
+		assertEquals(logic.getClearedLeft(), true);
+	}
+
+	@Test
+	void testSinkShip() {
+		Logic logic = new Logic();
+
+		logic.setFoundShip(true);
+		logic.setClearedAbove(true);
+		logic.setClearedBelow(true);
+		logic.setClearedRight(true);
+		logic.setClearedLeft(true);
+
+		logic.sinkShip();
+
+		assertEquals(logic.getFoundShip(), false);
+		assertEquals(logic.getClearedAbove(), false);
+		assertEquals(logic.getClearedBelow(), false);
+		assertEquals(logic.getClearedLeft(), false);
+		assertEquals(logic.getClearedRight(), false);
+
+	}
+
+	@Test
+	void testChooseFieldAboveAfterHit() {
+		Logic logic = new Logic();
+		int size = 4;
+		Coordinate center = new Coordinate(2, 2);
+		Coordinate expectedResult = new Coordinate(2, 3);
+		Matchfield matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		matchfield.setState(center, Coordinate.HIT);
+		matchfield.setState(expectedResult, Coordinate.HIT);
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(center);
+		logic.setTarget(center);
+		logic.setFoundShip(true);
+
+		Coordinate result = logic.chooseField();
+		assertEquals(result, expectedResult);
+	}
+
+	@Test
+	void testChooseFieldBelowAfterHit() {
+		Logic logic = new Logic();
+		int size = 4;
+		Coordinate center = new Coordinate(2, 2);
+		Coordinate expectedResult = new Coordinate(2, 1);
+		Matchfield matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		matchfield.setState(center, Coordinate.HIT);
+		matchfield.setState(expectedResult, Coordinate.HIT);
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(center);
+		logic.setTarget(center);
+		logic.setFoundShip(true);
+		logic.chooseField();// first Shot
+		Coordinate result = logic.chooseField(); // second Shot
+
+		assertEquals(result, expectedResult);
+	}
+
+	@Test
+	void testChooseFieldRightAfterHit() {
+		Logic logic = new Logic();
+		int size = 4;
+		Coordinate center = new Coordinate(2, 2);
+		Coordinate expectedResult = new Coordinate(3, 2);
+		Matchfield matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		matchfield.setState(center, Coordinate.HIT);
+		matchfield.setState(expectedResult, Coordinate.HIT);
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(center);
+		logic.setTarget(center);
+		logic.setFoundShip(true);
+
+		logic.chooseField(); // first Shot
+		logic.chooseField(); // second Shot
+		Coordinate result = logic.chooseField();
+
+		assertEquals(result, expectedResult);
+	}
+
+	@Test
+	void testChooseFieldLeftAfterHit() {
+		Logic logic = new Logic();
+		int size = 4;
+		Coordinate center = new Coordinate(2, 2);
+		Coordinate expectedResult = new Coordinate(1, 2);
+		Matchfield matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+		matchfield.setState(center, Coordinate.HIT);
+		matchfield.setState(expectedResult, Coordinate.HIT);
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(center);
+		logic.setTarget(center);
+		logic.setFoundShip(true);
+
+		logic.chooseField(); // first Shot
+		logic.chooseField(); // second Shot
+		logic.chooseField(); // third Shot Coordinate
+		Coordinate result = logic.chooseField();
+		assertEquals(result, expectedResult);
+	}
+
+	@Test
+	void testShipIsOnYAxis() {
+		int size = 10;
+		Logic logic = new Logic();
+		Matchfield matchfield = new Matchfield(size);
+		Coordinate s1 = new Coordinate(5, 4);
+		Coordinate s2 = new Coordinate(5, 5);
+		Coordinate s3 = new Coordinate(5, 6);
+
+		matchfield.createMatchfield();
+		matchfield.setState(s1, Coordinate.SHIP);
+		matchfield.setState(s2, Coordinate.HIT);
+		matchfield.setState(s3, Coordinate.SHIP);
+
+		logic.setMatchfield(matchfield);
+		logic.setLastShot(s2);
+		logic.setTarget(s2);
+		logic.setFoundShip(true);
+
+		logic.chooseField(); // First shot (s3)
+		logic.getMatchfield().setState(s3, Coordinate.HIT); //
+		logic.chooseField(); // Second Shot
+		logic.getMatchfield().setState(new Coordinate(5, 7), Coordinate.SHOT);
+
+		logic.chooseField(); // Third Shot (s1)
+		logic.getMatchfield().setState(s1, Coordinate.HIT); //
+		logic.chooseField(); // fourth Shot
+
+		assertEquals(logic.getFoundShip(), false);
+		assertEquals(logic.getClearedAbove(), false);
+		assertEquals(logic.getClearedBelow(), false);
+		assertEquals(logic.getClearedLeft(), false);
+		assertEquals(logic.getClearedRight(), false);
+
+	}
 }
diff --git a/src/test/java/de/tims/fleetstorm/gui/LogicTest.java b/src/test/java/de/tims/fleetstorm/gui/LogicTest.java
new file mode 100644
index 0000000..4b02637
--- /dev/null
+++ b/src/test/java/de/tims/fleetstorm/gui/LogicTest.java
@@ -0,0 +1,36 @@
+package de.tims.fleetstorm.gui;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class LogicTest {
+
+	GameLogic guiLogic = new GameLogic(0, 0, 0, 0);
+
+	@BeforeEach
+	void setup() {
+		guiLogic.start(true);
+	}
+
+	@Test
+	void testIfGameStateIsRunningAfterStart() {
+		int expectedState = GameLogic.RUNNING;
+
+		int calculatedState = guiLogic.getGameState();
+
+		assertEquals(expectedState, calculatedState);
+	}
+
+	@Test
+	void testIfGameStateIsGameOverAfterGameOverFunction() {
+		int expectedState = GameLogic.GAME_OVER;
+
+		guiLogic.gameOver(true);
+		int calculatedState = guiLogic.getGameState();
+
+		assertEquals(expectedState, calculatedState);
+	}
+
+}
diff --git a/src/test/java/de/tims/fleetstorm/matchfield/CoordinateTest.java b/src/test/java/de/tims/fleetstorm/matchfield/CoordinateTest.java
new file mode 100644
index 0000000..196f4c2
--- /dev/null
+++ b/src/test/java/de/tims/fleetstorm/matchfield/CoordinateTest.java
@@ -0,0 +1,82 @@
+package de.tims.fleetstorm.matchfield;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class CoordinateTest {
+
+	int x = 1;
+	int y = 3;
+
+	Coordinate coordinate = new Coordinate(x, y);
+
+	@Test
+	void testGetCorrectValuesForXY() {
+		assertEquals(coordinate.getX(), x);
+		assertEquals(coordinate.getY(), y);
+	}
+
+	@Test
+	void testCoordinatehasDefaultStates() {
+		assertEquals(coordinate.getState(), Coordinate.EMPTY);
+		assertEquals(coordinate.getState(), 0);
+	}
+
+	@ParameterizedTest(name = "All Getters/Setters are working")
+	@MethodSource("AllGettersAreWorking")
+	void testGetAndSetForAllStates(String testName, int state, int stateCode, int expectedResult) {
+		coordinate.setState(state);
+		int result = coordinate.getState();
+		assertThat(result).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> AllGettersAreWorking() {
+		return Stream.of(Arguments.of("State = SHIP", 1, Coordinate.SHIP, Coordinate.SHIP),
+				Arguments.of("State = SHOT", 2, Coordinate.SHOT, Coordinate.SHOT),
+				Arguments.of("State = HIT", 3, Coordinate.HIT, Coordinate.HIT),
+				Arguments.of("State = EMPTY", 0, Coordinate.EMPTY, Coordinate.EMPTY));
+	}
+
+	@ParameterizedTest(name = "test if shoot function sets correct field states")
+	@MethodSource("ShootFunctionFieldStates")
+	void testShootFunctionSetsCorrectFieldStates(String testName, Coordinate coordinateToTest, int expectedState) {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		// set dummy ship
+		matchfield.setShip(new Coordinate(0, 0), 5, 0);
+
+		Coordinate realCoordinate = matchfield.getField(coordinateToTest);
+		realCoordinate.shoot();
+		int calculatedResult = realCoordinate.getState();
+		assertThat(calculatedResult).describedAs(testName).isEqualTo(expectedState);
+	}
+
+	static Stream<Arguments> ShootFunctionFieldStates() {
+		return Stream.of(Arguments.of("Field State is HIT", new Coordinate(0, 0), Coordinate.HIT),
+				Arguments.of("Field State is SHOT", new Coordinate(0, 1), Coordinate.SHOT));
+	}
+
+	@Test
+	void testIfShootCheckWhenFieldIsAlreadyShot() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		// set dummy ship
+		matchfield.setShip(new Coordinate(3, 3), 4, 1);
+
+		assertTrue(matchfield.getField(0, 0).shoot());
+		assertFalse(matchfield.getField(0, 0).shoot());
+
+		matchfield.getField(3, 4).shoot();
+		assertFalse(matchfield.getField(3, 4).shoot());
+	}
+
+}
diff --git a/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldCreationTest.java b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldCreationTest.java
new file mode 100644
index 0000000..5bda4fe
--- /dev/null
+++ b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldCreationTest.java
@@ -0,0 +1,145 @@
+
+package de.tims.fleetstorm.matchfield;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class MatchfieldCreationTest {
+
+	@Test
+	void testMatchfieldCreateNotEmpty() {
+		Matchfield matchfield = new Matchfield(0);
+		Coordinate[][] calcResult = matchfield.createMatchfield();
+		assertNotNull(calcResult);
+	}
+
+	@ParameterizedTest(name = "matchfield creation has correct size")
+	@MethodSource("testMatchfieldSize")
+	void testMatchfieldCreationHasCorrectSize(String testName, int size, int expectedResult) {
+		Matchfield matchfield = new Matchfield(size);
+		matchfield.createMatchfield();
+
+		int calcResult = matchfield.getSize();
+		assertThat(calcResult).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> testMatchfieldSize() {
+		return Stream.of(Arguments.of("field size 10x10", 10, 100), Arguments.of("field size 15x15", 15, 225));
+	}
+
+	@ParameterizedTest(name = "matchfield get field is correct")
+	@MethodSource("testMatchfieldGetFieldState")
+	void testMatchfieldGetCorrectState(String testName, int x, int y, int expectedResult) {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		int calcResult = matchfield.getState(x, y);
+		assertThat(calcResult).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> testMatchfieldGetFieldState() {
+		return Stream.of(Arguments.of("field x:0 y:0 has empty state", 0, 0, Coordinate.EMPTY));
+	}
+
+	@ParameterizedTest(name = "matchfield change field is correct")
+	@MethodSource("testMatchfieldSetStateIsCorrect")
+	void testMatchfieldGetCorrectState(String testName, int x, int y, int state, int expectedResult) {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setState(x, y, state);
+
+		int calcResult = matchfield.getState(x, y);
+		assertThat(calcResult).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> testMatchfieldSetStateIsCorrect() {
+		return Stream.of(
+				Arguments.of("field x:0 y:0 has state SHIP after setState()", 0, 0, Coordinate.SHIP, Coordinate.SHIP));
+	}
+
+	@ParameterizedTest(name = "Get the Coordinate right")
+	@MethodSource("getCoordinateRight")
+	void testGetRight(String testName, Matchfield matchfield, Coordinate center, Coordinate expectedResult) {
+
+		Coordinate result = matchfield.getRight(center);
+		assertThat(result).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> getCoordinateRight() {
+		Matchfield matchfield = new Matchfield(10);
+		return Stream.of(
+				Arguments.of("right from (5/5) - should be (6,5)", matchfield, new Coordinate(5, 5),
+						matchfield.getField(6, 5)),
+				Arguments.of("right from (9/5) - should be null", matchfield, new Coordinate(9, 5), null));
+	}
+
+	@ParameterizedTest(name = "Get the Coordinate left")
+	@MethodSource("getCoordinateLeft")
+	void testGetLeft(String testName, Matchfield matchfield, Coordinate center, Coordinate expectedResult) {
+
+		Coordinate result = matchfield.getLeft(center);
+		assertThat(result).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> getCoordinateLeft() {
+		Matchfield matchfield = new Matchfield(10);
+		return Stream.of(
+				Arguments.of("left from (5/5) - should be (4,5)", matchfield, new Coordinate(5, 5),
+						matchfield.getField(4, 5)),
+				Arguments.of("left from (0/5) - should be null", matchfield, new Coordinate(0, 5), null));
+	}
+
+	@ParameterizedTest(name = "Get the Coordinate above")
+	@MethodSource("getCoordinateAbove")
+	void testGetAbove(String testName, Matchfield matchfield, Coordinate center, Coordinate expectedResult) {
+
+		Coordinate result = matchfield.getAbove(center);
+		assertThat(result).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> getCoordinateAbove() {
+		Matchfield matchfield = new Matchfield(10);
+		return Stream.of(
+				Arguments.of("above from (5/5) - should be (5,6)", matchfield, new Coordinate(5, 5),
+						matchfield.getField(5, 6)),
+				Arguments.of("above from (5/9) - should be null", matchfield, new Coordinate(5, 5), null));
+	}
+
+	@ParameterizedTest(name = "Get the Coordinate below")
+	@MethodSource("getCoordinateBelow")
+	void testGetBelow(String testName, Matchfield matchfield, Coordinate center, Coordinate expectedResult) {
+
+		Coordinate result = matchfield.getBelow(center);
+		assertThat(result).describedAs(testName).isEqualTo(expectedResult);
+	}
+
+	static Stream<Arguments> getCoordinateBelow() {
+		Matchfield matchfield = new Matchfield(10);
+		return Stream.of(
+				Arguments.of("below from (5/5) - should be (5,4)", matchfield, new Coordinate(5, 5),
+						matchfield.getField(5, 4)),
+				Arguments.of("below from (5/0) - should be null", matchfield, new Coordinate(5, 0), null));
+	}
+
+	@Test
+	void testsetStateOverloaded() {
+
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+		int x = 3;
+		int y = 3;
+		matchfield.setState(new Coordinate(x, y), Coordinate.SHIP);
+		int result = matchfield.getState(x, y);
+		assertEquals(result, Coordinate.SHIP);
+
+	}
+}
diff --git a/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java
new file mode 100644
index 0000000..665f367
--- /dev/null
+++ b/src/test/java/de/tims/fleetstorm/matchfield/MatchfieldShipTest.java
@@ -0,0 +1,133 @@
+
+package de.tims.fleetstorm.matchfield;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.stream.Stream;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class MatchfieldShipTest {
+
+	@ParameterizedTest(name = "ship was set on the correct positions")
+	@MethodSource("testShipPositioning")
+	void testMatchfieldShipSetHasCorrectPositions(String testName, int matchfieldSize, Coordinate coordinate,
+			int direction, int length, Coordinate[] coordinatesWithShip) {
+		Matchfield matchfield = new Matchfield(matchfieldSize);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(coordinate, length, direction);
+
+		int shipSetCounter = 0;
+		for (Coordinate toCheckCoordinate : coordinatesWithShip) {
+			if (matchfield.getField(toCheckCoordinate).getState() == Coordinate.SHIP)
+				shipSetCounter++;
+		}
+
+		assertThat(shipSetCounter).describedAs(testName).isEqualTo(length);
+	}
+
+	static Stream<Arguments> testShipPositioning() {
+		Coordinate[] coordinatesWithShip00_2_0 = new Coordinate[] { new Coordinate(0, 0), new Coordinate(1, 0) };
+		Coordinate[] coordinatesWithShip01_3_0 = new Coordinate[] { new Coordinate(0, 1), new Coordinate(1, 1),
+				new Coordinate(2, 1) };
+		Coordinate[] coordinatesWithShip02_4_1 = new Coordinate[] { new Coordinate(0, 2), new Coordinate(0, 3),
+				new Coordinate(0, 4), new Coordinate(0, 5) };
+
+		return Stream.of(
+				Arguments.of("set ship from 0:0, length 2, direction 0", 10, new Coordinate(0, 0), 0, 2,
+						coordinatesWithShip00_2_0),
+				Arguments.of("set ship from 0:1, length 3, direction 0", 10, new Coordinate(0, 1), 0, 3,
+						coordinatesWithShip01_3_0),
+				Arguments.of("set ship from 0:2, length 4, direction 1", 10, new Coordinate(0, 2), 1, 4,
+						coordinatesWithShip02_4_1));
+	}
+
+	@ParameterizedTest(name = "ship positioning on invalid or valid coordinates")
+	@MethodSource("testShipPositioningFailed")
+	void testMatchfieldShipSetWithInvalidOrValidCoordinates(String testName, int matchfieldSize, Coordinate coordinate,
+			int direction, int length, boolean expectedResult) {
+		Matchfield matchfield = new Matchfield(matchfieldSize);
+		matchfield.createMatchfield();
+
+		boolean calculatedResult = matchfield.setShip(coordinate, length, direction);
+
+		if (expectedResult)
+			assertThat(calculatedResult).describedAs(testName).isEqualTo(true);
+
+		if (!expectedResult)
+			assertThat(calculatedResult).describedAs(testName).isEqualTo(false);
+	}
+
+	static Stream<Arguments> testShipPositioningFailed() {
+		return Stream.of(
+				Arguments.of("invalid ship position from 9:0, length 2, direction 0", 10, new Coordinate(9, 0), 0, 2,
+						false),
+				Arguments.of("valid ship position from 8:0, length 5, direction 1", 10, new Coordinate(9, 0), 1, 5,
+						true));
+	}
+
+	@Test
+	void testShipPositionAlreadySetWithShip() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(new Coordinate(0, 0), 5, 1);
+		assertThat(matchfield.setShip(new Coordinate(0, 1), 5, 1)).describedAs("set ship on coordinate with ship")
+				.isEqualTo(false);
+
+		assertThat(matchfield.setShip(new Coordinate(1, 1), 4, 0)).describedAs("set ship on coordinate without ship")
+				.isEqualTo(true);
+		assertThat(matchfield.setShip(new Coordinate(4, 1), 2, 1))
+				.describedAs("set second ship on coordinate without ship").isEqualTo(false);
+	}
+
+	@Test
+	void testIfAllShipsHitReturnsFalseWhenNoShipIsHit() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(new Coordinate(0, 0), 5, 1);
+		boolean calulatedResult = matchfield.areAllShipsHit();
+		assertFalse(calulatedResult);
+	}
+
+	@Test
+	void testIfAllShipsHitReturnsTrueWhenAllShipsAreHit() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(new Coordinate(0, 0), 5, 1);
+		matchfield.getField(0, 0).setState(Coordinate.HIT);
+		matchfield.getField(0, 1).setState(Coordinate.HIT);
+		matchfield.getField(0, 2).setState(Coordinate.HIT);
+		matchfield.getField(0, 3).setState(Coordinate.HIT);
+		matchfield.getField(0, 4).setState(Coordinate.HIT);
+
+		boolean calulatedResult = matchfield.areAllShipsHit();
+		assertTrue(calulatedResult);
+	}
+
+	@Test
+	void testIfAllShipsHitReturnsFalseWhenTwoShipsAreNotFullyHit() {
+		Matchfield matchfield = new Matchfield(10);
+		matchfield.createMatchfield();
+
+		matchfield.setShip(new Coordinate(0, 0), 5, 1);
+		matchfield.getField(0, 0).setState(Coordinate.HIT);
+		matchfield.getField(0, 1).setState(Coordinate.HIT);
+		matchfield.getField(0, 2).setState(Coordinate.HIT);
+		matchfield.getField(0, 3).setState(Coordinate.HIT);
+		matchfield.getField(0, 4).setState(Coordinate.HIT);
+
+		matchfield.setShip(new Coordinate(3, 4), 2, 0);
+		matchfield.getField(4, 4).setState(Coordinate.HIT);
+
+		boolean calulatedResult = matchfield.areAllShipsHit();
+		assertFalse(calulatedResult);
+	}
+}