diff --git a/admin.php b/admin.php
index 14d6d7d..03e810f 100644
--- a/admin.php
+++ b/admin.php
@@ -19,14 +19,25 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['add_course'])) {
         $tournament_date = null;
     }
 
-    for ($i = 1; $i <= 18; $i++) {
-        $par_value = filter_input(INPUT_POST, 'par_hole_' . $i, FILTER_VALIDATE_INT);
-        if ($par_value === false || $par_value < 1 || $par_value > 7) {
-            $error = "Invalid par value for hole " . $i . ". Please enter a number between 1 and 7.";
-            $isValid = false;
-            break;
+    if ($isValid) {
+        $num_holes_to_validate = ($hole_count == 9) ? 9 : 18;
+        for ($i = 1; $i <= 18; $i++) {
+            $par_value = filter_input(INPUT_POST, 'par_hole_' . $i, FILTER_VALIDATE_INT);
+
+            if ($i <= $num_holes_to_validate) {
+                if ($par_value === false || $par_value < 1 || $par_value > 7) {
+                    $error = "Invalid par value for hole " . $i . ". Please enter a number between 1 and 7.";
+                    $isValid = false;
+                    break;
+                }
+            } else {
+                // For 9-hole courses, holes 10-18 should be 0.
+                if ($par_value !== 0) {
+                    $par_value = 0;
+                }
+            }
+            $pars[] = $par_value;
         }
-        $pars[] = $par_value;
     }
 
     if ($isValid) {
@@ -208,5 +219,37 @@ try {
     </footer>
 
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+    <script>
+        document.addEventListener('DOMContentLoaded', function () {
+            const holeCountSelect = document.getElementById('hole_count');
+
+            function toggleParHoles() {
+                const selectedHoles = parseInt(holeCountSelect.value, 10);
+                for (let i = 1; i <= 18; i++) {
+                    const holeInput = document.getElementById('par_hole_' + i);
+                    const holeInputDiv = holeInput.parentElement;
+
+                    if (i > 9) {
+                        if (selectedHoles === 9) {
+                            holeInputDiv.style.display = 'none';
+                            holeInput.value = 0;
+                            holeInput.required = false;
+                        } else {
+                            holeInputDiv.style.display = '';
+                            if (holeInput.value == 0) { // Only reset if it was 0
+                                holeInput.value = 4; // reset to default
+                            }
+                            holeInput.required = true;
+                        }
+                    }
+                }
+            }
+
+            holeCountSelect.addEventListener('change', toggleParHoles);
+
+            // Initial check on page load
+            toggleParHoles();
+        });
+    </script>
 </body>
 </html>
\ No newline at end of file
diff --git a/db/setup.php b/db/setup.php
index f24f1a8..ab02a87 100644
--- a/db/setup.php
+++ b/db/setup.php
@@ -65,6 +65,21 @@ try {
     ");
     echo "Table 'scores' created successfully or already exists.<br>";
 
+    // Add hole_count to courses if it doesn't exist
+    $stmt = $pdo->query("SHOW COLUMNS FROM courses LIKE 'hole_count'");
+    if ($stmt->rowCount() == 0) {
+        $pdo->exec("ALTER TABLE courses ADD COLUMN hole_count INT NOT NULL DEFAULT 18");
+        echo "Column 'hole_count' added to 'courses' table.<br>";
+    }
+
+    // Add tournament_date to courses if it doesn't exist
+    $stmt = $pdo->query("SHOW COLUMNS FROM courses LIKE 'tournament_date'");
+    if ($stmt->rowCount() == 0) {
+        $pdo->exec("ALTER TABLE courses ADD COLUMN tournament_date DATE");
+        echo "Column 'tournament_date' added to 'courses' table.<br>";
+    }
+
+
 } catch (PDOException $e) {
     die("DB ERROR: " . $e->getMessage());
 }