diff --git a/app/src/main/java/org/toop/app/Server.java b/app/src/main/java/org/toop/app/Server.java
index 0b10983..ed5adc9 100644
--- a/app/src/main/java/org/toop/app/Server.java
+++ b/app/src/main/java/org/toop/app/Server.java
@@ -118,7 +118,7 @@ public final class Server {
 				return;
 			}
 
-			primary = new ServerView(user, this::sendChallenge);
+			primary = new ServerView(user, this::sendChallenge, clientId);
 			WidgetContainer.getCurrentView().transitionNextCustom(primary, "disconnect", this::disconnect);
 
 			a.unsubscribe("connecting");
diff --git a/app/src/main/java/org/toop/app/widget/view/ServerView.java b/app/src/main/java/org/toop/app/widget/view/ServerView.java
index 7365e74..3a3ce9b 100644
--- a/app/src/main/java/org/toop/app/widget/view/ServerView.java
+++ b/app/src/main/java/org/toop/app/widget/view/ServerView.java
@@ -10,16 +10,20 @@ import javafx.application.Platform;
 import javafx.geometry.Pos;
 import javafx.scene.control.Button;
 import javafx.scene.control.ListView;
+import org.toop.framework.eventbus.EventFlow;
+import org.toop.framework.networking.connection.events.NetworkEvents;
 
 public final class ServerView extends ViewWidget {
 	private final String user;
 	private final Consumer<String> onPlayerClicked;
+	private final long clientId;
 
 	private final ListView<Button> listView;
 
-	public ServerView(String user, Consumer<String> onPlayerClicked) {
+	public ServerView(String user, Consumer<String> onPlayerClicked, long clientId) {
 		this.user = user;
 		this.onPlayerClicked = onPlayerClicked;
+		this.clientId = clientId;
 
 		this.listView = new ListView<>();
 
@@ -29,9 +33,16 @@ public final class ServerView extends ViewWidget {
 	private void setupLayout() {
 		var playerHeader = Primitive.header(user, false);
 
+		Button subscribeButton = Primitive.button(
+				"subscribe",
+				() -> new EventFlow().addPostEvent(new NetworkEvents.SendSubscribe(clientId, "reversi")).postEvent(),
+				false
+		); // TODO localize
+
 		var playerListSection = Primitive.vbox(
 			playerHeader,
 			Primitive.separator(),
+			subscribeButton,
 			listView
 		);
 
diff --git a/framework/src/main/java/org/toop/framework/networking/server/Server.java b/framework/src/main/java/org/toop/framework/networking/server/Server.java
index 6b82050..42a03e0 100644
--- a/framework/src/main/java/org/toop/framework/networking/server/Server.java
+++ b/framework/src/main/java/org/toop/framework/networking/server/Server.java
@@ -110,7 +110,9 @@ public class Server implements GameServer<TurnBasedGame, NettyClient, Long> {
     @Override
     public void subscribeClient(String clientName, String gameTypeKey) {
 
-        if (!gameTypesStore.all().containsKey(gameTypeKey)) return;
+        if (!gameTypesStore.all().containsKey(gameTypeKey)) {
+            return;
+        }
 
         subscriptions.forEach((_, clientNames) -> clientNames.remove(clientName));
         subscriptions.computeIfAbsent(
@@ -126,8 +128,14 @@ public class Server implements GameServer<TurnBasedGame, NettyClient, Long> {
 
     @Override
     public void startGame(String gameType, NettyClient... clients) {
+        IO.println("------------------------------------------");
+
+        IO.println("USERS: " + clients.length + " " + Arrays.stream(clients).toList().toString());
+
         if (!gameTypesStore.all().containsKey(gameType)) return;
 
+        IO.println("------------------------------------------");
+
         try {
             ServerPlayer[] players = new ServerPlayer[clients.length];
             var game = new OnlineTurnBasedGame(gameTypesStore.create(gameType), clients);
@@ -150,7 +158,10 @@ public class Server implements GameServer<TurnBasedGame, NettyClient, Long> {
                     gameType,
                     clients[0].name()));
             game.start();
-        } catch (Exception ignored) {}
+        } catch (Exception e) {
+            IO.println("ERROR: Failed to start OnlineTurnBasedGame");
+            e.printStackTrace();
+        }
     }
 
     @Override
@@ -188,25 +199,29 @@ public class Server implements GameServer<TurnBasedGame, NettyClient, Long> {
     private void checkSubscriptions() {
         if (subscriptions.isEmpty()) return;
 
-        List<String> keys = subscriptions.keySet().stream().toList();
+        List<String> keys = List.copyOf(subscriptions.keySet());
+        Random ran = new Random();
 
         for (String key : keys) {
-            var userNames = subscriptions.get(key);
+            List<String> userNames = subscriptions.get(key);
             if (userNames.size() < 2) continue;
 
-            Random ran = new Random();
-
             while (userNames.size() > 1) {
+                int left = ran.nextInt(userNames.size());
+                int right;
+                do {
+                    right = ran.nextInt(userNames.size());
+                } while (left == right);
 
-                var left = ran.nextInt(userNames.size());
-                var right = ran.nextInt(userNames.size());
+                String userLeft = userNames.get(left);
+                String userRight = userNames.get(right);
 
-                while (left == right) left = ran.nextInt(userNames.size());
+                int first = Math.max(left, right);
+                int second = Math.min(left, right);
+                userNames.remove(first);
+                userNames.remove(second);
 
-                subscriptions.get(key).remove(userNames.get(left));
-                subscriptions.get(key).remove(userNames.get(right));
-
-                startGame(key, getUser(left), getUser(right));
+                startGame(key, getUser(userLeft), getUser(userRight));
             }
         }
     }
diff --git a/framework/src/main/java/org/toop/framework/networking/server/gateway/NettyGatewayServer.java b/framework/src/main/java/org/toop/framework/networking/server/gateway/NettyGatewayServer.java
index 9a4a73f..8123255 100644
--- a/framework/src/main/java/org/toop/framework/networking/server/gateway/NettyGatewayServer.java
+++ b/framework/src/main/java/org/toop/framework/networking/server/gateway/NettyGatewayServer.java
@@ -22,7 +22,6 @@ import org.toop.framework.networking.server.stores.TurnBasedGameStore;
 import org.toop.framework.networking.server.stores.TurnBasedGameTypeStore;
 
 import java.time.Duration;
-import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 
diff --git a/framework/src/main/java/org/toop/framework/networking/server/handlers/MessageHandler.java b/framework/src/main/java/org/toop/framework/networking/server/handlers/MessageHandler.java
index b6da22c..bc09273 100644
--- a/framework/src/main/java/org/toop/framework/networking/server/handlers/MessageHandler.java
+++ b/framework/src/main/java/org/toop/framework/networking/server/handlers/MessageHandler.java
@@ -34,7 +34,11 @@ public class MessageHandler implements Handler<ParsedMessage> {
 
     // DO NOT INVERT
     private boolean hasArgs(String... args) {
-        return (args.length >= 1);
+        if (args.length < 1) {
+            client.send("ERR not enough arguments");
+            return false;
+        }
+        return true;
     }
 
     private void handleLogin(ParsedMessage p, Client<OnlineTurnBasedGame, ServerPlayer> client) {
@@ -46,7 +50,7 @@ public class MessageHandler implements Handler<ParsedMessage> {
     private void handleSubscribe(ParsedMessage p, Client<OnlineTurnBasedGame, ServerPlayer> client) {
         if (!hasArgs(p.args())) return;
 
-        server.subscribeClient(p.args()[0], client.name());
+        server.subscribeClient(client.name(), p.args()[0]);
     }
 
     private void handleHelp(ParsedMessage p, Client<OnlineTurnBasedGame, ServerPlayer> client) {