diff --git a/src/FKSDBDownloader.php b/src/FKSDBDownloader.php
index f59087c..173cc4a 100644
--- a/src/FKSDBDownloader.php
+++ b/src/FKSDBDownloader.php
@@ -88,7 +88,7 @@ public function downloadJSON(Request $request): string
         );
         restore_error_handler();
         if ($result === false) {
-            $result = error_get_last();
+            $result = error_get_last()['message'];
         }
         return $result;
     }
diff --git a/src/Requests/SeriesResultsRequest.php b/src/Requests/SeriesResultsRequest.php
new file mode 100644
index 0000000..a5df201
--- /dev/null
+++ b/src/Requests/SeriesResultsRequest.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Fykosak\FKSDBDownloaderCore\Requests;
+
+class SeriesResultsRequest implements Request
+{
+    private int $contestId;
+    private int $year;
+    private int $series;
+
+    public function __construct(int $contestId, int $year, int $series)
+    {
+        $this->contestId = $contestId;
+        $this->year = $year;
+        $this->series = $series;
+    }
+
+    public function getMethod(): string
+    {
+        return 'GetSeriesResults';
+    }
+
+    public function getParams(): array
+    {
+        return [
+            'contestId' => $this->contestId,
+            'year' => $this->year,
+            'series' => $this->series,
+        ];
+    }
+
+    public function getCacheKey(): string
+    {
+        return sprintf('series.results.%s.%s.%s', $this->contestId, $this->year, $this->series);
+    }
+}
diff --git a/src/Requests/StatsRequest.php b/src/Requests/StatsRequest.php
new file mode 100644
index 0000000..d884d04
--- /dev/null
+++ b/src/Requests/StatsRequest.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Fykosak\FKSDBDownloaderCore\Requests;
+
+class StatsRequest implements Request
+{
+    private int $contestId;
+    private int $year;
+
+    public function __construct(int $contestId, int $year)
+    {
+        $this->contestId = $contestId;
+        $this->year = $year;
+    }
+
+    public function getMethod(): string
+    {
+        return 'GetStats';
+    }
+
+    public function getParams(): array
+    {
+        return [
+            'contestId' => $this->contestId,
+            'year' => $this->year,
+        ];
+    }
+
+    public function getCacheKey(): string
+    {
+        return sprintf('task.stats.%s.%s', $this->contestId, $this->year);
+    }
+}