diff --git a/docs/index.rst b/docs/index.rst
index d4d1000..e646356 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -30,9 +30,8 @@ Links
 * `Project README <README.html>`_
 * `API Documentations <docs/>`_
 * `CodeCoverage <coverage/>`_
-* `Metrics <metrics/>`_
 * `Test report <test/index.html>`_
-* `Mutation testing <mutation/>`_
+* `Mutation testing <mutation/infection.html>`_
 
 
 Standard Tools
diff --git a/src/SkillCalculator.php b/src/SkillCalculator.php
index 9aedd73..5ef4572 100644
--- a/src/SkillCalculator.php
+++ b/src/SkillCalculator.php
@@ -11,6 +11,12 @@ use Exception;
  */
 abstract class SkillCalculator
 {
+    public const NONE = 0x00;
+
+    public const PARTIAL_PLAY = 0x01;
+
+    public const PARTIAL_UPDATE = 0x02;
+
     protected function __construct(
         private readonly int $supportedOptions,
         private readonly TeamsRange $totalTeamsAllowed,
diff --git a/src/SkillCalculatorSupportedOptions.php b/src/SkillCalculatorSupportedOptions.php
deleted file mode 100644
index ac7895d..0000000
--- a/src/SkillCalculatorSupportedOptions.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace DNW\Skills;
-
-class SkillCalculatorSupportedOptions
-{
-    public const NONE = 0x00;
-
-    public const PARTIAL_PLAY = 0x01;
-
-    public const PARTIAL_UPDATE = 0x02;
-}
diff --git a/src/TrueSkill/FactorGraphTrueSkillCalculator.php b/src/TrueSkill/FactorGraphTrueSkillCalculator.php
index de4cb76..98fcec5 100644
--- a/src/TrueSkill/FactorGraphTrueSkillCalculator.php
+++ b/src/TrueSkill/FactorGraphTrueSkillCalculator.php
@@ -14,7 +14,6 @@ use DNW\Skills\PartialPlay;
 use DNW\Skills\PlayersRange;
 use DNW\Skills\RankSorter;
 use DNW\Skills\SkillCalculator;
-use DNW\Skills\SkillCalculatorSupportedOptions;
 use DNW\Skills\Team;
 use DNW\Skills\TeamsRange;
 use DNW\Skills\RatingContainer;
@@ -27,7 +26,7 @@ class FactorGraphTrueSkillCalculator extends SkillCalculator
 {
     public function __construct()
     {
-        parent::__construct(SkillCalculatorSupportedOptions::PARTIAL_PLAY | SkillCalculatorSupportedOptions::PARTIAL_UPDATE, TeamsRange::atLeast(2), PlayersRange::atLeast(1));
+        parent::__construct(SkillCalculator::PARTIAL_PLAY | SkillCalculator::PARTIAL_UPDATE, TeamsRange::atLeast(2), PlayersRange::atLeast(1));
     }
 
     /**
diff --git a/src/TrueSkill/TwoPlayerTrueSkillCalculator.php b/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
index 0528e28..30414b7 100644
--- a/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
+++ b/src/TrueSkill/TwoPlayerTrueSkillCalculator.php
@@ -13,9 +13,7 @@ use DNW\Skills\RankSorter;
 use DNW\Skills\Rating;
 use DNW\Skills\RatingContainer;
 use DNW\Skills\SkillCalculator;
-use DNW\Skills\SkillCalculatorSupportedOptions;
 use DNW\Skills\TeamsRange;
-use DNW\Skills\Team;
 
 /**
  * Calculates the new ratings for only two players.
@@ -27,7 +25,7 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
 {
     public function __construct()
     {
-        parent::__construct(SkillCalculatorSupportedOptions::NONE, TeamsRange::exactly(2), PlayersRange::exactly(1));
+        parent::__construct(SkillCalculator::NONE, TeamsRange::exactly(2), PlayersRange::exactly(1));
     }
 
     /**
diff --git a/src/TrueSkill/TwoTeamTrueSkillCalculator.php b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
index 31950d7..68567a2 100644
--- a/src/TrueSkill/TwoTeamTrueSkillCalculator.php
+++ b/src/TrueSkill/TwoTeamTrueSkillCalculator.php
@@ -13,7 +13,6 @@ use DNW\Skills\RankSorter;
 use DNW\Skills\Rating;
 use DNW\Skills\RatingContainer;
 use DNW\Skills\SkillCalculator;
-use DNW\Skills\SkillCalculatorSupportedOptions;
 use DNW\Skills\Team;
 use DNW\Skills\TeamsRange;
 
@@ -26,7 +25,7 @@ class TwoTeamTrueSkillCalculator extends SkillCalculator
 {
     public function __construct()
     {
-        parent::__construct(SkillCalculatorSupportedOptions::NONE, TeamsRange::exactly(2), PlayersRange::atLeast(1));
+        parent::__construct(SkillCalculator::NONE, TeamsRange::exactly(2), PlayersRange::atLeast(1));
     }
 
     /**
diff --git a/tests/TrueSkill/FactorGraphTrueSkillCalculatorTest.php b/tests/TrueSkill/FactorGraphTrueSkillCalculatorTest.php
index 3574232..1157a59 100644
--- a/tests/TrueSkill/FactorGraphTrueSkillCalculatorTest.php
+++ b/tests/TrueSkill/FactorGraphTrueSkillCalculatorTest.php
@@ -8,7 +8,7 @@ use DNW\Skills\GameInfo;
 use DNW\Skills\Player;
 use DNW\Skills\Team;
 use DNW\Skills\TrueSkill\FactorGraphTrueSkillCalculator;
-use DNW\Skills\SkillCalculatorSupportedOptions;
+use DNW\Skills\SkillCalculator;
 use PHPUnit\Framework\TestCase;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\Attributes\CoversNothing;
@@ -78,6 +78,6 @@ class FactorGraphTrueSkillCalculatorTest extends TestCase
     public function testMethodisSupported(): void
     {
         $calculator = new FactorGraphTrueSkillCalculator();
-        $this->assertEquals(TRUE, $calculator->isSupported(SkillCalculatorSupportedOptions::PARTIAL_PLAY));
+        $this->assertEquals(TRUE, $calculator->isSupported(SkillCalculator::PARTIAL_PLAY));
     }
 }