Grad Restriction to Participate in the Olympiad.

diff --git a/L2jOne_C6_Interlude/config/events.properties b/L2jOne_C6_Interlude/config/events.properties
index de91772..be27bac 100644
--- a/L2jOne_C6_Interlude/config/events.properties
+++ b/L2jOne_C6_Interlude/config/events.properties
@@ -84,6 +84,9 @@
 OlyDividerClassed = 3
 OlyDividerNonClassed = 5

+# Grid Restriction to Participate in the Olympiad. configure: S;A;B;C;D
+OlyGradeRestrictionItemsList = D
+
 #=============================================================
 #                  Seven Signs && Festival
 #=============================================================
diff --git a/L2jOne_C6_Interlude/java/net/sf/l2j/Config.java b/L2jOne_C6_Interlude/java/net/sf/l2j/Config.java
index 4591c05..3cff48e 100644
--- a/L2jOne_C6_Interlude/java/net/sf/l2j/Config.java
+++ b/L2jOne_C6_Interlude/java/net/sf/l2j/Config.java
@@ -4,7 +4,9 @@
 import java.io.FileOutputStream;
 import java.io.OutputStream;
 import java.math.BigInteger;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Properties;

@@ -13,6 +15,7 @@
 import net.sf.l2j.commons.math.MathUtil;

 import net.sf.l2j.gameserver.enums.GeoType;
+import net.sf.l2j.gameserver.enums.items.CrystalType;
 import net.sf.l2j.gameserver.model.holder.IntIntHolder;

 /**
@@ -151,6 +154,7 @@
 	public static int OLY_DIVIDER_CLASSED;
 	public static int OLY_DIVIDER_NON_CLASSED;
 	public static boolean OLY_ANNOUNCE_GAMES;
+	public static List<CrystalType> OLY_GRADE_RESTRICTION = new ArrayList<>();

 	/** SevenSigns Festival */
 	public static boolean SEVEN_SIGNS_BYPASS_PREREQUISITES;
@@ -791,6 +795,9 @@
 		OLY_DIVIDER_NON_CLASSED = events.getProperty("OlyDividerNonClassed", 5);
 		OLY_ANNOUNCE_GAMES = events.getProperty("OlyAnnounceGames", true);

+		for (String list : events.getProperty("OlyGradeRestrictionItemsList", "A;S").split(";"))
+			OLY_GRADE_RESTRICTION.add(CrystalType.valueOf(list));
+
 		SEVEN_SIGNS_BYPASS_PREREQUISITES = events.getProperty("SevenSignsBypassPrerequisites", false);
 		FESTIVAL_MIN_PLAYER = MathUtil.limit(events.getProperty("FestivalMinPlayer", 5), 2, 9);
 		MAXIMUM_PLAYER_CONTRIB = events.getProperty("MaxPlayerContrib", 1000000);
diff --git a/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/item/kind/Item.java b/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/item/kind/Item.java
index 496cd5d..3962123 100644
--- a/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/item/kind/Item.java
+++ b/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/item/kind/Item.java
@@ -8,6 +8,7 @@

 import net.sf.l2j.commons.data.StatSet;

+import net.sf.l2j.Config;
 import net.sf.l2j.gameserver.enums.items.ActionType;
 import net.sf.l2j.gameserver.enums.items.ArmorType;
 import net.sf.l2j.gameserver.enums.items.CrystalType;
@@ -508,6 +509,9 @@

 	public boolean isOlyRestrictedItem()
 	{
+		if (!Config.OLY_GRADE_RESTRICTION.contains(getCrystalType()))
+			return true;
+
 		return _isOlyRestricted;
 	}

diff --git a/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/olympiad/AbstractOlympiadGame.java b/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/olympiad/AbstractOlympiadGame.java
index ce6b90f..7252e7a 100644
--- a/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/olympiad/AbstractOlympiadGame.java
+++ b/L2jOne_C6_Interlude/java/net/sf/l2j/gameserver/model/olympiad/AbstractOlympiadGame.java
@@ -5,6 +5,7 @@
 import net.sf.l2j.commons.logging.CLogger;
 import net.sf.l2j.commons.util.ArraysUtil;

+import net.sf.l2j.Config;
 import net.sf.l2j.gameserver.data.SkillTable;
 import net.sf.l2j.gameserver.data.xml.MapRegionData;
 import net.sf.l2j.gameserver.enums.MessageType;
@@ -347,6 +348,21 @@
 		// Remove shot automation
 		player.disableAutoShotsAll();

+		for (ItemInstance item : player.getInventory().getItems())
+		{
+			if (item  == null)
+				continue;
+
+			if (!Config.OLY_GRADE_RESTRICTION.contains(item.getItem().getCrystalType()))
+			{
+				player.getInventory().unequipItemInBodySlotAndRecord(item);
+
+				final InventoryUpdate iu = new InventoryUpdate();
+				iu.addRemovedItem(item);
+				player.sendPacket(iu);
+			}
+		}
+
 		// Discharge any active shots
 		ItemInstance item = player.getActiveWeaponInstance();
 		if (item != null)