diff --git a/src/main/java/de/tims/fleetstorm/ai/Logic.java b/src/main/java/de/tims/fleetstorm/ai/Logic.java
index 668984b..8acdc8d 100644
--- a/src/main/java/de/tims/fleetstorm/ai/Logic.java
+++ b/src/main/java/de/tims/fleetstorm/ai/Logic.java
@@ -26,12 +26,12 @@ public class Logic {
 		return possibleFields.get(randy.nextInt(possibleFields.size()));
 	}
 
-	public ArrayList<Coordinate> getEverySecondField(Matchfield matchfield) {
+	public ArrayList<Coordinate> getEverySecondField() {
 		ArrayList<Coordinate> out = new ArrayList<Coordinate>();
-		for (int x = 0; x < Math.sqrt(matchfield.getSize()); x++) {
-			for (int y = 0; y < Math.sqrt(matchfield.getSize()); y++) {
+		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(matchfield.getField(x, y));
+					out.add(this.matchfield.getField(x, y));
 				}
 			}
 		}
diff --git a/src/test/java/de/tims/fleetstorm/ai/LogicTest.java b/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
index 440710d..7257ccf 100644
--- a/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
+++ b/src/test/java/de/tims/fleetstorm/ai/LogicTest.java
@@ -53,8 +53,9 @@ class LogicTest {
 		int size = 4;
 		matchfield = new Matchfield(size);
 		matchfield.createMatchfield();
+		logic.setMatchfield(matchfield);
 
-		ArrayList<Coordinate> everySecondField = logic.getEverySecondField(matchfield);
+		ArrayList<Coordinate> everySecondField = logic.getEverySecondField();
 		ArrayList<Coordinate> expectedResult = new ArrayList<Coordinate>();
 
 		expectedResult.add(new Coordinate(0, 0));