diff --git a/src/main/java/BowlingGameCalculator.java b/src/main/java/BowlingGameCalculator.java
index 27ce370..8ea8bd1 100644
--- a/src/main/java/BowlingGameCalculator.java
+++ b/src/main/java/BowlingGameCalculator.java
@@ -4,14 +4,22 @@ import java.util.regex.Pattern;
 public class BowlingGameCalculator {
 
     private static final Pattern SINGLE_VALUE_PATTERN = Pattern.compile("\\d");
+    private static final Pattern SPARE_PATTERN = Pattern.compile("/[ -,]*(\\d)");
     private static final int INITIAL_SCORE_VALUE = 0;
 
     public int score(String playerResult) {
-        Matcher singleDigit = SINGLE_VALUE_PATTERN.matcher(playerResult);
         int playerScore = INITIAL_SCORE_VALUE;
+
+        Matcher singleDigit = SINGLE_VALUE_PATTERN.matcher(playerResult);
         while (singleDigit.find()) {
             playerScore += Integer.parseInt(singleDigit.group());
         }
+
+        Matcher spare = SPARE_PATTERN.matcher(playerResult);
+        while (spare.find()) {
+            playerScore += 10 + Integer.parseInt(spare.group(1));
+        }
+
         return playerScore;
     }
 }
diff --git a/src/test/java/BowlingCalculatorTest.java b/src/test/java/BowlingCalculatorTest.java
index 91755ee..a63a75a 100644
--- a/src/test/java/BowlingCalculatorTest.java
+++ b/src/test/java/BowlingCalculatorTest.java
@@ -22,7 +22,8 @@ public class BowlingCalculatorTest {
         return Stream.of(
                 Arguments.of("worst game", "0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0", 0),   // 20x 0
                 Arguments.of("some incomplete frames", "0,1,2,3,0,0,4,0,0,5,0,0,6,0,0,0,0,0,0,0", 21),
-                Arguments.of("some other incomplete frames", "9- 9- 9- 9- 9- 9- 9- 9- 9- 9-", 90)
+                Arguments.of("some other incomplete frames", "9- 9- 9- 9- 9- 9- 9- 9- 9- 9-", 90),
+                Arguments.of("roll after spare counts twice", "0,0 ,0,/ ,1,0 ,0,0,0,0,0,0,0,0,0,0,0,0,0,0", 12)    // Wurf nach Spare (/) zählt doppelt
         );
     }
 }
diff --git a/target/classes/BowlingGameCalculator.class b/target/classes/BowlingGameCalculator.class
index cb9921d..e06f1b2 100644
Binary files a/target/classes/BowlingGameCalculator.class and b/target/classes/BowlingGameCalculator.class differ
diff --git a/target/test-classes/BowlingCalculatorTest.class b/target/test-classes/BowlingCalculatorTest.class
index fd22f84..b58c7dd 100644
Binary files a/target/test-classes/BowlingCalculatorTest.class and b/target/test-classes/BowlingCalculatorTest.class differ