diff --git a/docs/README.md b/docs/README.md
index d6cd26c4e..007869388 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -25,7 +25,7 @@ slug.
| [1 kyu](/kata/1-kyu/index.md) | [2 kyu](/kata/2-kyu/index.md) | [3 kyu](/kata/3-kyu/index.md) | [4 kyu](/kata/4-kyu/index.md) | [5 kyu](/kata/5-kyu/index.md) | [6 kyu](/kata/6-kyu/index.md) | [7 kyu](/kata/7-kyu/index.md) | [8 kyu](/kata/8-kyu/index.md) | [beta](/kata/beta/index.md) | [retired](/kata/retired/index.md) |
|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:-----------------------------:|:---------------------------:|:---------------------------------:|
-| 0 | 1 | 2 | 26 | 48 | 439 | 603 | 226 | 56 | 82 |
+| 0 | 1 | 2 | 26 | 48 | 440 | 603 | 226 | 56 | 82 |
**Note:** The source code is written in Java 17 and may use language features that are incompatible
with Java 8, 11.
diff --git a/kata/6-kyu/death-by-coffee/README.md b/kata/6-kyu/death-by-coffee/README.md
new file mode 100644
index 000000000..25a13b632
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+++ b/kata/6-kyu/death-by-coffee/README.md
@@ -0,0 +1,64 @@
+# [Death by Coffee](https://www.codewars.com/kata/death-by-coffee "https://www.codewars.com/kata/57db78d3b43dfab59c001abe")
+
+## Background
+
+I drink too much coffee. Eventually it will probably kill me.
+
+*Or will it...?*
+
+Anyway, there's no way to know.
+
+*Or is there...?*
+
+## The Discovery of the Formula
+
+I proudly announce my discovery of a formula for measuring the life-span of coffee drinkers!
+
+For
+
+* ```h``` is a health number assigned to each person (8 digit date of birth YYYYMMDD)
+* ```CAFE``` is a cup of *regular* coffee
+* ```DECAF``` is a cup of *decaffeinated* coffee
+
+To determine the life-time coffee limits:
+
+* Drink cups of coffee (i.e. add to ```h```) until any part of the health number includes `DEAD`
+* If the test subject can survive drinking five thousand cups without being ```DEAD``` then coffee has no ill effect on them
+
+# Kata Task
+
+Given the test subject's date of birth, return an array describing their life-time coffee limits
+
+```[ regular limit , decaffeinated limit ]```
+
+## Notes
+
+* The limits are ```0``` if the subject is unaffected as described above
+
+* At least 1 cup must be consumed (Just thinking about coffee cannot kill you!)
+
+# Examples
+
+* John was born 19/Jan/1950 so ```h=19500119```. His coffee limits are ```[2645, 1162]``` which is only about 1 cup per week. You
+ better cut back John...How are you feeling? You don't look so well.
+
+
+* Susan (11/Dec/1965) is unaffected by decaffeinated coffee, but regular coffee is very bad for her ```[111, 0]```. Just stick to the
+ decaf Susan.
+
+
+* Elizabeth (28/Nov/1964) is allergic to decaffeinated coffee. Dead after only 11 cups ```[0, 11]```. Read the label carefully Lizzy!
+ Is it worth the risk?
+
+
+* Peter (4/Sep/1965) can drink as much coffee as he likes ```[0, 0]```. You're a legend Peter!!
+
+
+
+Hint: https://en.wikipedia.org/wiki/Hexadecimal
+
+
+
+
+*Note: A life-span prediction formula this accurate has got to be worth a lot of money to somebody! I am willing to sell my copyright to the highest bidder. Contact me via the discourse section of this Kata.*
+
\ No newline at end of file
diff --git a/kata/6-kyu/death-by-coffee/main/Dinglemouse.java b/kata/6-kyu/death-by-coffee/main/Dinglemouse.java
new file mode 100644
index 000000000..92202f35a
--- /dev/null
+++ b/kata/6-kyu/death-by-coffee/main/Dinglemouse.java
@@ -0,0 +1,14 @@
+import static java.util.stream.IntStream.range;
+
+import java.util.function.ToIntBiFunction;
+
+interface Dinglemouse {
+ static int[] coffeeLimits(int year, int month, int day) {
+ ToIntBiFunction limit = (h, c) -> range(1, 5000)
+ .filter(i -> Integer.toHexString(h[0] += c).contains("dead")).findFirst().orElse(0);
+ return new int[]{
+ limit.applyAsInt(new int[]{10000 * year + 100 * month + day}, 0xCAFE),
+ limit.applyAsInt(new int[]{10000 * year + 100 * month + day}, 0xDECAF)
+ };
+ }
+}
\ No newline at end of file
diff --git a/kata/6-kyu/death-by-coffee/test/DinglemouseTest.java b/kata/6-kyu/death-by-coffee/test/DinglemouseTest.java
new file mode 100644
index 000000000..16a356447
--- /dev/null
+++ b/kata/6-kyu/death-by-coffee/test/DinglemouseTest.java
@@ -0,0 +1,18 @@
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+
+class DinglemouseTest {
+ @ParameterizedTest
+ @CsvSource(textBlock = """
+ 1965, 9, 4, 0, 0
+ 1964, 11, 28, 0, 11
+ 1965, 12, 11, 111, 0
+ 1950, 1, 19, 2645, 1162
+ 1880, 3, 1, 0, 3909
+ """)
+ void sample(int y, int m, int d, int cafe, int decaf) {
+ assertArrayEquals(new int[]{cafe, decaf}, Dinglemouse.coffeeLimits(y, m, d));
+ }
+}
\ No newline at end of file
diff --git a/kata/6-kyu/index.md b/kata/6-kyu/index.md
index 8ec44c89d..a2a589c1f 100644
--- a/kata/6-kyu/index.md
+++ b/kata/6-kyu/index.md
@@ -106,6 +106,7 @@
- [Data compression using run-length encoding](data-compression-using-run-length-encoding)
- [Data Reverse](data-reverse)
- [Dead Ants](dead-ants)
+- [Death by Coffee](death-by-coffee)
- [Decode the Morse code](decode-the-morse-code)
- [Decode the woofs!](decode-the-woofs)
- [Delete occurrences of an element if it occurs more than n times](delete-occurrences-of-an-element-if-it-occurs-more-than-n-times)