diff --git a/challenges/rotate-2-dimensional-array-90-degrees/README.md b/challenges/rotate-2-dimensional-array-90-degrees/README.md
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+# rotate-2-dimensional-array-90-degrees
+
+Created by [@Divlo](https://github.com/Divlo) on 3 December 2021.
+
+## Instructions
+
+Given a square/rectangle matrix representing an image and a direction of rotation (`clockwise` or `anticlockwise`), rotate the image by 90 degrees.
+
+### Input
+
+- **Line 1:** The direction (`clockwise` or `anticlockwise`) of rotation
+- **Next Lines:** The matrix of the image
+
+### Output
+
+- **Lines:** The rotated matrix
+
+## Examples
+
+### Example 1
+
+#### Input
+
+```txt
+clockwise
+1 2 3
+4 5 6
+7 8 9
+```
+
+#### Output
+
+```txt
+7 4 1
+8 5 2
+9 6 3
+```
+
+### Example 2
+
+#### Input
+
+```txt
+anticlockwise
+1 2 3
+4 5 6
+7 8 9
+```
+
+#### Output
+
+```txt
+1 4 7
+2 5 8
+3 6 9
+```
+
+See the `test` folder for examples of input/output.
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/solutions/.gitkeep b/challenges/rotate-2-dimensional-array-90-degrees/solutions/.gitkeep
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diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/1/input.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/1/input.txt
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--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/1/input.txt
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+clockwise
+1 2 3
+4 5 6
+7 8 9
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/1/output.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/1/output.txt
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--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/1/output.txt
@@ -0,0 +1,3 @@
+7 4 1
+8 5 2
+9 6 3
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/2/input.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/2/input.txt
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index 0000000..10b8eab
--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/2/input.txt
@@ -0,0 +1,4 @@
+anticlockwise
+1 2 3
+4 5 6
+7 8 9
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/2/output.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/2/output.txt
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index 0000000..4c1337c
--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/2/output.txt
@@ -0,0 +1,3 @@
+1 4 7
+2 5 8
+3 6 9
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/3/input.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/3/input.txt
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index 0000000..fb02601
--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/3/input.txt
@@ -0,0 +1,5 @@
+clockwise
+5 1 9 11
+2 4 8 10
+13 3 6 7
+15 14 12 16
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/3/output.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/3/output.txt
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index 0000000..ba878f6
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+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/3/output.txt
@@ -0,0 +1,4 @@
+15 13 2 5
+14 3 4 1
+12 6 8 9
+16 7 10 11
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/4/input.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/4/input.txt
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--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/4/input.txt
@@ -0,0 +1,4 @@
+clockwise
+11 12 13 14
+21 22 23 24
+31 32 33 34
\ No newline at end of file
diff --git a/challenges/rotate-2-dimensional-array-90-degrees/test/4/output.txt b/challenges/rotate-2-dimensional-array-90-degrees/test/4/output.txt
new file mode 100644
index 0000000..cacb735
--- /dev/null
+++ b/challenges/rotate-2-dimensional-array-90-degrees/test/4/output.txt
@@ -0,0 +1,4 @@
+31 21 11
+32 22 12
+33 23 13
+34 24 14
\ No newline at end of file