diff --git a/docs/hackerrank/warmup/interview_preparation_kit/2d_array.md b/docs/hackerrank/interview_preparation_kit/2d_array.md
similarity index 100%
rename from docs/hackerrank/warmup/interview_preparation_kit/2d_array.md
rename to docs/hackerrank/interview_preparation_kit/2d_array.md
diff --git a/exercises/hackerrank/interview_preparation_kit/arrays/2d_array.go b/exercises/hackerrank/interview_preparation_kit/arrays/2d_array.go
index 3ea4260..3c0c5b3 100644
--- a/exercises/hackerrank/interview_preparation_kit/arrays/2d_array.go
+++ b/exercises/hackerrank/interview_preparation_kit/arrays/2d_array.go
@@ -1,5 +1,5 @@
 /**
- * @link Problem definition [[docs/hackerrank/warmup/interview_preparation_kit/2d_array.md]]
+ * @link Problem definition [[docs/hackerrank/interview_preparation_kit/2d_array.md]]
  */
 
 package hackerrank
@@ -48,3 +48,7 @@ func hourglassSum(arr [][]int32) int32 {
 
 	return maxHourglassSum
 }
+
+func HourglassSum(arr [][]int32) int32 {
+	return hourglassSum(arr)
+}
diff --git a/exercises/hackerrank/interview_preparation_kit/arrays/2d_array_test.go b/exercises/hackerrank/interview_preparation_kit/arrays/2d_array_test.go
index d87d6a2..dcebbe4 100644
--- a/exercises/hackerrank/interview_preparation_kit/arrays/2d_array_test.go
+++ b/exercises/hackerrank/interview_preparation_kit/arrays/2d_array_test.go
@@ -9,34 +9,34 @@ import (
 	"gon.cl/algorithms/utils"
 )
 
-type TestCase struct {
+type TwoDArrayTestCase struct {
 	Input    [][]int32 `json:"input"`
 	Expected int32     `json:"expected"`
 }
 
-var testCases []TestCase
+var TwoDArrayTestCases []TwoDArrayTestCase
 
 // You can use testing.T, if you want to test the code without benchmarking
-func setupSuite(t testing.TB) {
+func twoDArraySetupSuite(t testing.TB) {
 	wd, _ := os.Getwd()
 	filepath := wd + "/2d_array.testcases.json"
 	t.Log("Setup test cases from JSON: ", filepath)
 
-	var _, err = utils.LoadJSON(filepath, &testCases)
+	var _, err = utils.LoadJSON(filepath, &TwoDArrayTestCases)
 	if err != nil {
 		t.Log(err)
 	}
 }
 
-func Test2DArray(t *testing.T) {
+func TestTwoDArray(t *testing.T) {
 
-	setupSuite(t)
+	twoDArraySetupSuite(t)
 
-	for _, tt := range testCases {
+	for _, tt := range TwoDArrayTestCases {
 		testname := fmt.Sprintf("hourglassSum(%v) => %v \n", tt.Input, tt.Expected)
 		t.Run(testname, func(t *testing.T) {
 
-			ans := hourglassSum(tt.Input)
+			ans := HourglassSum(tt.Input)
 			assert.Equal(t, tt.Expected, ans)
 		})