the leaderboard in the LeaderboardPlace calculates initially it's size based on the rendered clientWidth and uses the LastNStrategy for the displayed race columns in case the panel would need a scrollbar. This logic will only be executed once.

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/home/client/place/event/oldleaderboard/OldLeaderboard.css

@@ -1,6 +0,0 @@
-.oldLeaderboardPanel {
-/*   background-color:#f8f8f8; */
-  padding: 0 10px 10px 10px;
-  width: 100%;
-  
-}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/home/client/place/event/oldleaderboard/OldLeaderboard.java

@@ -50,7 +50,6 @@ public class OldLeaderboard extends Composite {
     public OldLeaderboard() {
         this.leaderboardPanel = null;
         EventRegattaLeaderboardResources.INSTANCE.css().ensureInjected();
-        OldLeaderboardResources.INSTANCE.css().ensureInjected();
         initWidget(uiBinder.createAndBindUi(this));
         settingsAnchor.setTitle(StringMessages.INSTANCE.settings());
         autoRefreshAnchor.setTitle(StringMessages.INSTANCE.refresh());

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/home/client/place/event/oldleaderboard/OldLeaderboard.ui.xml

@@ -5,7 +5,6 @@
     <ui:with field="i18n" type="com.sap.sailing.gwt.common.client.i18n.TextMessages"/>
 	<ui:with field="res" type="com.sap.sailing.gwt.common.client.SharedResources" />
     <ui:with field="local_res" type="com.sap.sailing.gwt.home.client.place.event.regattaleaderboard.EventRegattaLeaderboardResources" />
-    <ui:with field="local_res2" type="com.sap.sailing.gwt.home.client.place.event.oldleaderboard.OldLeaderboardResources" />
 		<g:HTMLPanel styleName=" {local_res.css.marginFix}">
 			<div class="{res.mediaCss.grid}" >
 			  <div class="{res.mediaCss.small7} {res.mediaCss.column} {local_res.css.regattaleaderboard_meta_scoring}">
@@ -24,11 +23,11 @@
 			</div>
 			  
 			<div class="{res.mediaCss.grid}" >
-			  <div class="{res.mediaCss.small12} {res.mediaCss.columns} {local_res.css.letItScroll}">
+ 			  <div class="{res.mediaCss.small12} {res.mediaCss.columns} {local_res.css.letItScroll}">
 			        <table class="{local_res.css.regattaleaderboard_table}">
       				  <tr>
       					<td>
-				<g:HTMLPanel ui:field="oldLeaderboardPanel" styleName="{local_res2.css.oldLeaderboardPanel}">
+				<g:HTMLPanel ui:field="oldLeaderboardPanel">
         		</g:HTMLPanel>
       					</td>
       				  </tr>

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/home/client/place/event/oldleaderboard/OldLeaderboardResources.java

@@ -1,16 +0,0 @@
-package com.sap.sailing.gwt.home.client.place.event.oldleaderboard;
-
-import com.google.gwt.core.client.GWT;
-import com.google.gwt.resources.client.ClientBundle;
-import com.google.gwt.resources.client.CssResource;
-
-public interface OldLeaderboardResources extends ClientBundle {
-    public static final OldLeaderboardResources INSTANCE = GWT.create(OldLeaderboardResources.class);
-
-    @Source("com/sap/sailing/gwt/home/client/place/event/oldleaderboard/OldLeaderboard.css")
-    LocalCss css();
-
-    public interface LocalCss extends CssResource {
-        String oldLeaderboardPanel();
-    }
-}

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/home/client/place/event/regatta/tabs/SharedLeaderboardRegattaTabView.java

@@ -11,6 +11,8 @@ import com.sap.sailing.gwt.ui.client.LeaderboardUpdateListener;
 import com.sap.sailing.gwt.ui.leaderboard.LeaderboardPanel;
 import com.sap.sailing.gwt.ui.leaderboard.LeaderboardSettings;
 import com.sap.sailing.gwt.ui.leaderboard.LeaderboardUrlSettings;
+import com.sap.sse.gwt.client.mutationobserver.ElementSizeMutationObserver;
+import com.sap.sse.gwt.client.mutationobserver.ElementSizeMutationObserver.DomMutationCallback;
 import com.sap.sse.gwt.shared.GwtHttpRequestUtils;
 
 /**
@@ -18,7 +20,8 @@ import com.sap.sse.gwt.shared.GwtHttpRequestUtils;
  */
 public abstract class SharedLeaderboardRegattaTabView<T extends AbstractEventRegattaPlace> extends Composite implements RegattaTabView<T>,
         LeaderboardUpdateListener {
-
+    private boolean initialLeaderboardSizeCalculated = false;
+    
     public SharedLeaderboardRegattaTabView() {
     }
 
@@ -28,7 +31,7 @@ public abstract class SharedLeaderboardRegattaTabView<T extends AbstractEventReg
         final LeaderboardSettings leaderboardSettings = EventParamUtils
                 .createLeaderboardSettingsFromURLParameters(Window.Location.getParameterMap());
         final RegattaAndRaceIdentifier preselectedRace = EventParamUtils.getPreselectedRace(Window.Location.getParameterMap());
-        LeaderboardPanel leaderboardPanel = regattaAnalyticsManager.createLeaderboardPanel( //
+        final LeaderboardPanel leaderboardPanel = regattaAnalyticsManager.createLeaderboardPanel( //
                 leaderboardSettings, //
                 preselectedRace, //
                 "leaderboardGroupName", // TODO: keep using magic string? ask frank!
@@ -36,6 +39,21 @@ public abstract class SharedLeaderboardRegattaTabView<T extends AbstractEventReg
                 true,
                 autoExpandLastRaceColumn);
         leaderboardPanel.addLeaderboardUpdateListener(this);
+        
+        if(ElementSizeMutationObserver.isSupported()) {
+            ElementSizeMutationObserver observer = new ElementSizeMutationObserver(new DomMutationCallback() {
+                @Override
+                public void onSizeChanged(int newWidth, int newHeight) {
+                    if(newWidth > 0 && newHeight > 0 && newWidth > 1500 && initialLeaderboardSizeCalculated == false) {
+                        int numberOfLastRacesToShow = (1500 - 600) / 50;
+                        leaderboardPanel.setRaceColumnSelectionToLastNStrategy(numberOfLastRacesToShow);
+                        initialLeaderboardSizeCalculated = true;
+                    }
+                }
+            }); 
+            observer.observe(leaderboardPanel.getLeaderboardTable().getElement());
+        }
+
         return leaderboardPanel;
     }
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/leaderboard/LeaderboardPanel.java

@@ -537,7 +537,7 @@ public class LeaderboardPanel extends SimplePanel implements TimeListener, PlayS
                         }));
     }
 
-    void setRaceColumnSelectionToLastNStrategy(final Integer numberOfLastRacesToShow) {
+    public void setRaceColumnSelectionToLastNStrategy(final Integer numberOfLastRacesToShow) {
         raceColumnSelection = new LastNRacesColumnSelection(numberOfLastRacesToShow, getRaceTimesInfoProvider());
         if (timer.getPlayState() != Timer.PlayStates.Playing) {
             // wait for the first update and adjust leaderboard once the race times have been received
@@ -3019,7 +3019,7 @@ public class LeaderboardPanel extends SimplePanel implements TimeListener, PlayS
         return new CarryColumn();
     }
 
-    protected SortedCellTable<LeaderboardRowDTO> getLeaderboardTable() {
+    public SortedCellTable<LeaderboardRowDTO> getLeaderboardTable() {
         return leaderboardTable;
     }