diff --git a/README.md b/README.md
index 644552c..f855067 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,6 @@ Szkielet komponentu Joomla 6 do gromadzenia pytań testowych.
 
 ## Instalacja
 
-W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.33.0).
+W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.34.0).
 
 Po instalacji komponent jest dostępny w panelu administratora jako **Pytania testowe**.
diff --git a/administrator/components/com_testquestions/forms/set.xml b/administrator/components/com_testquestions/forms/set.xml
index affc801..3375c80 100644
--- a/administrator/components/com_testquestions/forms/set.xml
+++ b/administrator/components/com_testquestions/forms/set.xml
@@ -2,7 +2,13 @@
 <form>
     <fieldset name="details">
         <field name="id" type="hidden" />
+        <field name="parent_id" type="hidden" default="0" />
         <field name="title" type="text" label="COM_TESTQUESTIONS_SET_TITLE" required="true" maxlength="255" />
+        <field name="set_type" type="list" label="COM_TESTQUESTIONS_SET_TYPE" default="ordinary" required="true">
+            <option value="ordinary">COM_TESTQUESTIONS_SET_TYPE_ORDINARY</option>
+            <option value="multi">COM_TESTQUESTIONS_SET_TYPE_MULTI</option>
+            <option value="variant">COM_TESTQUESTIONS_SET_TYPE_VARIANT</option>
+        </field>
         <field name="subject_id" type="sql" label="COM_TESTQUESTIONS_SUBJECT" required="true" query="SELECT id, title FROM #__testquestions_subjects WHERE published = 1 ORDER BY title ASC" key_field="id" value_field="title" translate_query="false">
             <option value="0">COM_TESTQUESTIONS_SELECT_SUBJECT</option>
         </field>
diff --git a/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini b/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
index d1f00ec..32a40df 100644
--- a/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
+++ b/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
@@ -49,6 +49,14 @@ COM_TESTQUESTIONS_SETS="Zestawy pytań"
 COM_TESTQUESTIONS_NEW_SET="Nowy zestaw pytań"
 COM_TESTQUESTIONS_EDIT_SET="Edytuj zestaw pytań"
 COM_TESTQUESTIONS_SET_TITLE="Nazwa zestawu"
+COM_TESTQUESTIONS_SET_TYPE="Rodzaj zestawu"
+COM_TESTQUESTIONS_SET_TYPE_ORDINARY="Zwykły zestaw"
+COM_TESTQUESTIONS_SET_TYPE_MULTI="Zestaw wielowariantowy"
+COM_TESTQUESTIONS_SET_TYPE_VARIANT="Wariant zestawu"
+COM_TESTQUESTIONS_SET_VARIANTS="Warianty zestawu"
+COM_TESTQUESTIONS_SET_ADD_VARIANT="Dodaj wariant"
+COM_TESTQUESTIONS_SET_PARENT="Zestaw nadrzędny"
+COM_TESTQUESTIONS_SET_NO_VARIANTS="Brak wariantów"
 COM_TESTQUESTIONS_SET_DESCRIPTION="Opis zestawu"
 COM_TESTQUESTIONS_SET_QUESTIONS="Pytania w zestawie"
 COM_TESTQUESTIONS_SET_QUESTION_COUNT="Liczba pytań"
diff --git a/administrator/components/com_testquestions/sql/install.mysql.utf8mb4.sql b/administrator/components/com_testquestions/sql/install.mysql.utf8mb4.sql
index 2e29b11..7fc339d 100644
--- a/administrator/components/com_testquestions/sql/install.mysql.utf8mb4.sql
+++ b/administrator/components/com_testquestions/sql/install.mysql.utf8mb4.sql
@@ -40,6 +40,8 @@ VALUES (1, 'Bez kategorii', 1, 0);
 
 CREATE TABLE IF NOT EXISTS `#__testquestions_sets` (
   `id` int unsigned NOT NULL AUTO_INCREMENT,
+  `parent_id` int unsigned NOT NULL DEFAULT 0,
+  `set_type` varchar(12) NOT NULL DEFAULT 'ordinary',
   `subject_id` int unsigned NOT NULL DEFAULT 0,
   `title` varchar(255) NOT NULL,
   `duration` smallint unsigned NOT NULL DEFAULT 0,
@@ -54,6 +56,7 @@ CREATE TABLE IF NOT EXISTS `#__testquestions_sets` (
   `modified_by` int unsigned NOT NULL DEFAULT 0,
   PRIMARY KEY (`id`),
   KEY `idx_published` (`published`),
+  KEY `idx_parent_id` (`parent_id`),
   KEY `idx_ordering` (`ordering`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 DEFAULT COLLATE=utf8mb4_unicode_ci;
 
diff --git a/administrator/components/com_testquestions/sql/updates/mysql/1.34.0.sql b/administrator/components/com_testquestions/sql/updates/mysql/1.34.0.sql
new file mode 100644
index 0000000..153dbc7
--- /dev/null
+++ b/administrator/components/com_testquestions/sql/updates/mysql/1.34.0.sql
@@ -0,0 +1,7 @@
+ALTER TABLE `#__testquestions_sets`
+  ADD COLUMN `parent_id` int unsigned NOT NULL DEFAULT 0 AFTER `id`,
+  ADD COLUMN `set_type` varchar(12) NOT NULL DEFAULT 'ordinary' AFTER `parent_id`;
+
+UPDATE `#__testquestions_sets`
+SET `set_type` = 'ordinary'
+WHERE `set_type` = '' OR `set_type` IS NULL;
diff --git a/administrator/components/com_testquestions/src/Controller/SetController.php b/administrator/components/com_testquestions/src/Controller/SetController.php
index b075807..696c1c0 100644
--- a/administrator/components/com_testquestions/src/Controller/SetController.php
+++ b/administrator/components/com_testquestions/src/Controller/SetController.php
@@ -11,6 +11,12 @@ class SetController extends FormController
     protected $view_item = 'set';
     protected $view_list = 'sets';
 
+    public function addvariant(): void
+    {
+        $parentId = $this->input->getInt('parent_id');
+        $this->setRedirect('index.php?option=com_testquestions&view=set&layout=edit&parent_id=' . $parentId);
+    }
+
     public function cancel($key = null)
     {
         $this->setRedirect('index.php?option=com_testquestions&view=sets');
diff --git a/administrator/components/com_testquestions/src/Model/SetModel.php b/administrator/components/com_testquestions/src/Model/SetModel.php
index 8d23a12..6b31019 100644
--- a/administrator/components/com_testquestions/src/Model/SetModel.php
+++ b/administrator/components/com_testquestions/src/Model/SetModel.php
@@ -25,6 +25,14 @@ class SetModel extends AdminModel
 
         if ($item && !empty($item->id)) {
             $db = Factory::getContainer()->get('DatabaseDriver');
+            if ((int) $item->parent_id > 0) {
+                $item->parent_title = (string) $db->setQuery(
+                    $db->getQuery(true)
+                        ->select($db->quoteName('title'))
+                        ->from($db->quoteName('#__testquestions_sets'))
+                        ->where($db->quoteName('id') . ' = ' . (int) $item->parent_id)
+                )->loadResult();
+            }
             $item->question_ids = $db->setQuery(
                 $db->getQuery(true)
                     ->select($db->quoteName('question_id'))
@@ -41,7 +49,32 @@ class SetModel extends AdminModel
 
     protected function loadFormData()
     {
-        return Factory::getApplication()->getUserState('com_testquestions.edit.set.data', []) ?: $this->getItem();
+        $data = Factory::getApplication()->getUserState('com_testquestions.edit.set.data', []) ?: $this->getItem();
+        $parentId = Factory::getApplication()->getInput()->getInt('parent_id');
+
+        $hasId = is_array($data) ? !empty($data['id']) : !empty($data->id);
+
+        if ($parentId > 0 && !$hasId) {
+            $parent = $this->getItem($parentId);
+            $variantCount = count($this->getVariants($parentId));
+
+            if ($parent) {
+                $data = [
+                    'parent_id' => $parentId,
+                    'set_type' => 'variant',
+                    'title' => $parent->title . ' — wariant ' . ($variantCount + 1),
+                    'subject_id' => $parent->subject_id,
+                    'duration' => $parent->duration,
+                    'test_content' => $parent->test_content,
+                    'image' => $parent->image,
+                    'description' => $parent->description,
+                    'published' => $parent->published,
+                    'question_ids' => [],
+                ];
+            }
+        }
+
+        return $data;
     }
 
     public function getQuestions()
@@ -69,12 +102,41 @@ class SetModel extends AdminModel
         )->loadObjectList();
     }
 
+    public function getVariants($parentId = null)
+    {
+        $parentId = (int) ($parentId ?: Factory::getApplication()->getInput()->getInt('id'));
+
+        if ($parentId < 1) {
+            return [];
+        }
+
+        $db = Factory::getContainer()->get('DatabaseDriver');
+
+        return $db->setQuery(
+            $db->getQuery(true)
+                ->select(['id', 'title', 'published'])
+                ->from($db->quoteName('#__testquestions_sets'))
+                ->where($db->quoteName('parent_id') . ' = ' . $parentId)
+                ->order($db->quoteName('ordering') . ' ASC, ' . $db->quoteName('id') . ' ASC')
+        )->loadObjectList();
+    }
+
     public function save($data)
     {
         $formData = Factory::getApplication()->getInput()->post->get('jform', [], 'array');
         $questionIds = array_values(array_unique(array_filter(array_map('intval', (array) ($formData['question_ids'] ?? $data['question_ids'] ?? [])))));
         unset($data['question_ids']);
 
+        $parentId = (int) ($formData['parent_id'] ?? $data['parent_id'] ?? 0);
+        $parentId = max(0, $parentId);
+        $data['parent_id'] = $parentId;
+
+        if ($parentId > 0) {
+            $data['set_type'] = 'variant';
+        } elseif (!in_array(($data['set_type'] ?? 'ordinary'), ['ordinary', 'multi'], true)) {
+            $data['set_type'] = 'ordinary';
+        }
+
         if (!parent::save($data)) {
             return false;
         }
@@ -111,12 +173,28 @@ class SetModel extends AdminModel
         $db = Factory::getContainer()->get('DatabaseDriver');
         $ids = array_map('intval', (array) $pks);
 
+        if ($ids) {
+            $childIds = $db->setQuery(
+                $db->getQuery(true)
+                    ->select($db->quoteName('id'))
+                    ->from($db->quoteName('#__testquestions_sets'))
+                    ->where($db->quoteName('parent_id') . ' IN (' . implode(',', $ids) . ')')
+            )->loadColumn();
+            $ids = array_values(array_unique(array_merge($ids, array_map('intval', $childIds))));
+        }
+
         if ($ids) {
             $db->setQuery(
                 $db->getQuery(true)
                     ->delete($db->quoteName('#__testquestions_set_questions'))
                     ->where($db->quoteName('set_id') . ' IN (' . implode(',', $ids) . ')')
             )->execute();
+
+            $db->setQuery(
+                $db->getQuery(true)
+                    ->delete($db->quoteName('#__testquestions_sets'))
+                    ->where($db->quoteName('id') . ' IN (' . implode(',', $ids) . ')')
+            )->execute();
         }
 
         return true;
diff --git a/administrator/components/com_testquestions/src/Model/SetsModel.php b/administrator/components/com_testquestions/src/Model/SetsModel.php
index a324496..9bc2da6 100644
--- a/administrator/components/com_testquestions/src/Model/SetsModel.php
+++ b/administrator/components/com_testquestions/src/Model/SetsModel.php
@@ -21,9 +21,10 @@ class SetsModel extends ListModel
     {
         $db = Factory::getContainer()->get('DatabaseDriver');
         $query = $db->getQuery(true)
-            ->select(['s.*', 'sub.title AS subject_title', 'COUNT(sq.question_id) AS question_count'])
+            ->select(['s.*', 'sub.title AS subject_title', 'p.title AS parent_title', 'COUNT(sq.question_id) AS question_count'])
             ->from($db->quoteName('#__testquestions_sets', 's'))
             ->leftJoin($db->quoteName('#__testquestions_subjects', 'sub') . ' ON sub.id = s.subject_id')
+            ->leftJoin($db->quoteName('#__testquestions_sets', 'p') . ' ON p.id = s.parent_id')
             ->leftJoin($db->quoteName('#__testquestions_set_questions', 'sq') . ' ON sq.set_id = s.id')
             ->group('s.id');
 
diff --git a/administrator/components/com_testquestions/src/View/Set/HtmlView.php b/administrator/components/com_testquestions/src/View/Set/HtmlView.php
index 4b740c0..a23a02c 100644
--- a/administrator/components/com_testquestions/src/View/Set/HtmlView.php
+++ b/administrator/components/com_testquestions/src/View/Set/HtmlView.php
@@ -14,6 +14,7 @@ class HtmlView extends BaseHtmlView
     protected $item;
     protected $questions;
     protected $categories;
+    protected $variants;
 
     public function display($tpl = null)
     {
@@ -21,6 +22,7 @@ class HtmlView extends BaseHtmlView
         $this->item = $this->get('Item');
         $this->questions = $this->get('Questions');
         $this->categories = $this->get('Categories');
+        $this->variants = $this->item && (int) $this->item->id > 0 ? $this->get('Variants') : [];
 
         if (count($errors = $this->get('Errors'))) {
             throw new \RuntimeException(implode("\n", $errors));
diff --git a/administrator/components/com_testquestions/tmpl/set/edit.php b/administrator/components/com_testquestions/tmpl/set/edit.php
index 5ac909b..1c110a3 100644
--- a/administrator/components/com_testquestions/tmpl/set/edit.php
+++ b/administrator/components/com_testquestions/tmpl/set/edit.php
@@ -9,6 +9,13 @@ HTMLHelper::_('behavior.formvalidator');
 ?>
 <form action="<?php echo Route::_('index.php?option=com_testquestions&view=set&layout=edit&id=' . (int) $this->item->id); ?>" method="post" name="adminForm" id="adminForm" class="form-validate">
     <fieldset class="adminform">
+        <?php echo $this->form->renderField('parent_id'); ?>
+        <?php if ((int) $this->item->parent_id > 0) : ?>
+            <div class="alert alert-info"><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_PARENT'); ?>: <?php echo $this->escape($this->item->parent_title ?? ''); ?></div>
+            <input type="hidden" name="jform[set_type]" value="variant">
+        <?php else : ?>
+            <?php echo $this->form->renderField('set_type'); ?>
+        <?php endif; ?>
         <?php echo $this->form->renderField('title'); ?>
         <?php echo $this->form->renderField('subject_id'); ?>
         <?php echo $this->form->renderField('duration'); ?>
@@ -17,6 +24,26 @@ HTMLHelper::_('behavior.formvalidator');
         <?php echo $this->form->renderField('image'); ?>
         <?php echo $this->form->renderField('description'); ?>
         <?php echo $this->form->renderField('published'); ?>
+        <?php if ((int) $this->item->id > 0 && (string) $this->item->set_type === 'multi') : ?>
+            <fieldset class="mb-3">
+                <legend><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_VARIANTS'); ?></legend>
+                <?php if ($this->variants) : ?>
+                    <ul class="list-group mb-3">
+                        <?php foreach ($this->variants as $variant) : ?>
+                            <li class="list-group-item d-flex justify-content-between align-items-center">
+                                <a href="<?php echo Route::_('index.php?option=com_testquestions&task=set.edit&id=' . (int) $variant->id); ?>"><?php echo $this->escape($variant->title); ?></a>
+                                <span class="badge <?php echo (int) $variant->published ? 'bg-success' : 'bg-secondary'; ?>"><?php echo (int) $variant->published ? \Joomla\CMS\Language\Text::_('JPUBLISHED') : \Joomla\CMS\Language\Text::_('JUNPUBLISHED'); ?></span>
+                            </li>
+                        <?php endforeach; ?>
+                    </ul>
+                <?php else : ?>
+                    <p><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_NO_VARIANTS'); ?></p>
+                <?php endif; ?>
+                <a class="btn btn-secondary" href="<?php echo Route::_('index.php?option=com_testquestions&task=set.addvariant&parent_id=' . (int) $this->item->id); ?>">
+                    <?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_ADD_VARIANT'); ?>
+                </a>
+            </fieldset>
+        <?php endif; ?>
         <fieldset class="mb-3">
             <legend><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_SELECTED_QUESTIONS'); ?></legend>
             <div id="set-selected-question-list" class="border rounded p-3">
diff --git a/administrator/components/com_testquestions/tmpl/sets/default.php b/administrator/components/com_testquestions/tmpl/sets/default.php
index da884bb..5dc8b0b 100644
--- a/administrator/components/com_testquestions/tmpl/sets/default.php
+++ b/administrator/components/com_testquestions/tmpl/sets/default.php
@@ -38,6 +38,7 @@ HTMLHelper::_('behavior.multiselect');
             <tr>
                 <th scope="col" class="w-1"><?php echo HTMLHelper::_('grid.checkall'); ?></th>
                 <th scope="col"><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_TITLE'); ?></th>
+                <th scope="col"><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_TYPE'); ?></th>
                 <th scope="col"><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SUBJECT'); ?></th>
                 <th scope="col" class="w-15"><?php echo \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_QUESTION_COUNT'); ?></th>
                 <th scope="col" class="w-15"><?php echo \Joomla\CMS\Language\Text::_('JSTATUS'); ?></th>
@@ -48,7 +49,8 @@ HTMLHelper::_('behavior.multiselect');
         <?php foreach ($this->items as $i => $item) : ?>
             <tr>
                 <td><?php echo HTMLHelper::_('grid.id', $i, $item->id); ?></td>
-                <th scope="row"><a href="<?php echo Route::_('index.php?option=com_testquestions&task=set.edit&id=' . (int) $item->id); ?>"><?php echo $this->escape($item->title); ?></a></th>
+                <th scope="row"><a href="<?php echo Route::_('index.php?option=com_testquestions&task=set.edit&id=' . (int) $item->id); ?>"><?php echo (int) $item->parent_id > 0 ? '↳ ' : ''; ?><?php echo $this->escape($item->title); ?></a><?php if ((int) $item->parent_id > 0 && $item->parent_title) : ?> <small class="text-muted">(<?php echo $this->escape($item->parent_title); ?>)</small><?php endif; ?></th>
+                <td><?php echo $this->escape($item->set_type === 'multi' ? \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_TYPE_MULTI') : ($item->set_type === 'variant' ? \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_TYPE_VARIANT') : \Joomla\CMS\Language\Text::_('COM_TESTQUESTIONS_SET_TYPE_ORDINARY'))); ?></td>
                 <td><?php echo $this->escape($item->subject_title ?: '—'); ?></td>
                 <td><?php echo (int) $item->question_count; ?></td>
                 <td><?php echo HTMLHelper::_('jgrid.published', $item->published, $i, 'sets.', true, 'cb'); ?></td>
diff --git a/com_testquestions.xml b/com_testquestions.xml
index 76d873e..45ba0db 100644
--- a/com_testquestions.xml
+++ b/com_testquestions.xml
@@ -4,7 +4,7 @@
     <creationDate>2026-10-14</creationDate>
     <author>Komponent</author>
     <license>GNU General Public License version 2 or later</license>
-    <version>1.33.0</version>
+    <version>1.34.0</version>
     <description>COM_TESTQUESTIONS_DESCRIPTION</description>
     <element>com_testquestions</element>
     <namespace path="src">Komponent\Component\Testquestions</namespace>
diff --git a/components/com_testquestions/src/Model/SetModel.php b/components/com_testquestions/src/Model/SetModel.php
index 76305dc..24fdbf2 100644
--- a/components/com_testquestions/src/Model/SetModel.php
+++ b/components/com_testquestions/src/Model/SetModel.php
@@ -9,6 +9,8 @@ use Joomla\CMS\MVC\Model\BaseDatabaseModel;
 
 class SetModel extends BaseDatabaseModel
 {
+    protected $resolvedSetId;
+
     protected function getSetId(): int
     {
         $application = Factory::getApplication();
@@ -27,20 +29,46 @@ class SetModel extends BaseDatabaseModel
             return null;
         }
 
-        return $db->setQuery(
+        $set = $db->setQuery(
             $db->getQuery(true)
                 ->select(['s.*', 'sub.title AS subject_title'])
                 ->from($db->quoteName('#__testquestions_sets', 's'))
                 ->leftJoin($db->quoteName('#__testquestions_subjects', 'sub') . ' ON sub.id = s.subject_id')
                 ->where('s.id = ' . $setId)
+                ->where('s.parent_id = 0')
                 ->where('s.published = 1')
         )->loadObject();
+
+        if (!$set) {
+            return null;
+        }
+
+        $this->resolvedSetId = $setId;
+
+        if ($set->set_type === 'multi') {
+            $variantId = (int) $db->setQuery(
+                $db->getQuery(true)
+                    ->select('id')
+                    ->from($db->quoteName('#__testquestions_sets'))
+                    ->where('parent_id = ' . $setId)
+                    ->where('published = 1')
+                    ->order('RAND()')
+                    ->setLimit(1)
+            )->loadResult();
+
+            $this->resolvedSetId = $variantId;
+        }
+
+        return $set;
     }
 
     public function getItems()
     {
         $db = Factory::getContainer()->get('DatabaseDriver');
-        $setId = $this->getSetId();
+        if ($this->resolvedSetId === null) {
+            $this->getSet();
+        }
+        $setId = (int) $this->resolvedSetId;
 
         if ($setId < 1) {
             return [];
@@ -67,6 +95,7 @@ class SetModel extends BaseDatabaseModel
                 ->from($db->quoteName('#__testquestions_sets', 's'))
                 ->leftJoin($db->quoteName('#__testquestions_subjects', 'sub') . ' ON sub.id = s.subject_id')
                 ->where('s.published = 1')
+                ->where('s.parent_id = 0')
                 ->order('sub.title ASC, s.title ASC')
         )->loadObjectList();
     }