diff --git a/classquiz/socket_server/__init__.py b/classquiz/socket_server/__init__.py
index 2778107..8ac4665 100644
--- a/classquiz/socket_server/__init__.py
+++ b/classquiz/socket_server/__init__.py
@@ -81,6 +81,10 @@ async def join_game(sid: str, data: dict):
         except TypeError:
             pass
     # --- END checking captcha ---
+    if await redis.get(f"game_session:{data.game_pin}:players:{data.username}") is not None:
+        await sio.emit("username_already_exists", room=sid)
+        return
+
     session = {
         "game_pin": data.game_pin,
         "username": data.username,
@@ -97,6 +101,7 @@ async def join_game(sid: str, data: dict):
     )
     redis_res = await redis.get(f"game_session:{data.game_pin}")
     redis_res = GameSession.parse_raw(redis_res)
+    await redis.set(f"game_session:{data.game_pin}:players:{data.username}", sid, ex=18000)
     await redis.sadd(f"game_session:{data.game_pin}:players", GamePlayer(username=data.username, sid=sid).json())
     # await redis.set(
     #     f"game_session:{data.game_pin}",
@@ -344,3 +349,27 @@ async def echo_time_sync(sid: str, data: str):
     delta = now - then
     async with sio.session(sid) as session:
         session["ping"] = delta.microseconds / 1000
+
+
+class _KickPlayerInput(BaseModel):
+    username: str
+
+
+@sio.event
+async def kick_player(sid: str, data: dict):
+    try:
+        data = _KickPlayerInput(**data)
+    except ValidationError as e:
+        await sio.emit("error", room=sid)
+        print(e)
+        return
+
+    session: dict = await sio.get_session(sid)
+    if not session["admin"]:
+        return
+
+    player_sid = await redis.get(f"game_session:{session['game_pin']}:players:{data.username}")
+
+    print(player_sid, session["game_pin"])
+    sio.leave_room(player_sid, session["game_pin"])
+    await sio.emit("kick", room=player_sid)
diff --git a/frontend/src/routes/admin/+page.svelte b/frontend/src/routes/admin/+page.svelte
index 66f0ccd..e7ac679 100644
--- a/frontend/src/routes/admin/+page.svelte
+++ b/frontend/src/routes/admin/+page.svelte
@@ -104,6 +104,18 @@
 			(!('theme' in localStorage) &&
 				window.matchMedia('(prefers-color-scheme: dark)').matches);
 	}
+
+	const kick_player = (username: string) => {
+		socket.emit('kick_player', { username: username });
+		for (let i = 0; i < players.length; i++) {
+			console.log(players[i].username, username);
+			if (players[i].username === username) {
+				players.splice(i, 1);
+				break;
+			}
+		}
+		players = players;
+	};
 </script>
 
 <svelte:window on:beforeunload={confirmUnload} />
@@ -147,7 +159,12 @@
 				{#if players.length > 0}
 					{#each players as player}
 						<li>
-							<span>{player.username}</span>
+							<span
+								class="hover:line-through"
+								on:click={() => {
+									kick_player(player.username);
+								}}>{player.username}</span
+							>
 							<!--					<button>{$t('words.kick')}</button>-->
 						</li>
 					{/each}
diff --git a/frontend/src/routes/play/+page.svelte b/frontend/src/routes/play/+page.svelte
index be0b848..cface64 100644
--- a/frontend/src/routes/play/+page.svelte
+++ b/frontend/src/routes/play/+page.svelte
@@ -47,16 +47,20 @@
 
 	let question;
 
+	let preventReload = true;
+
 	// Functions
 	function restart() {
 		unique = {};
 	}
 
 	const confirmUnload = () => {
-		event.preventDefault();
-		// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-		// @ts-ignore
-		event.returnValue = '';
+		if (preventReload) {
+			event.preventDefault();
+			// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+			// @ts-ignore
+			event.returnValue = '';
+		}
 	};
 
 	socket.on('time_sync', (data) => {
@@ -96,6 +100,17 @@
 		}
 	});
 
+	socket.on('username_already_exists', () => {
+		window.alert('Username already exists!');
+	});
+
+	socket.on('kick', () => {
+		window.alert('You got kicked');
+		preventReload = false;
+		game_pin = '';
+		username = '';
+		window.location.reload();
+	});
 	socket.on('final_results', (data) => {
 		final_results = data;
 	});