diff --git a/receiver/challenges/carbeat.py b/receiver/challenges/carbeat.py
deleted file mode 100644
index 54023f6..0000000
--- a/receiver/challenges/carbeat.py
+++ /dev/null
@@ -1,157 +0,0 @@
-from .Challenge import Challenge
-
-import subprocess
-import time
-import re
-import os
-
-class Carbeat(Challenge):
-    flag_location    = 'flags/carbeat.txt'
-    history_location = 'history/carbeat.txt'
-
-    _CONTAINER   = "carbeat_container"
-    _SERVICE_CMD = ["docker", "exec", "-i", _CONTAINER, "/home/ctf/chall/mybini"]
-    _HEX_RE      = re.compile(r'^[0-9a-fA-F]+$')
-
-    def _read_container_flag(self) -> str:
-        out = subprocess.run(["docker", "exec", self._CONTAINER, "cat", "/flag.txt"],
-                             capture_output=True, text=True)
-        if out.returncode != 0 or not out.stdout.strip():
-            raise FileNotFoundError("Flag not found in container (/flag.txt)")
-        return out.stdout.strip()
-
-    def _spawn(self):
-        return subprocess.Popen(
-            self._SERVICE_CMD,
-            stdin=subprocess.PIPE,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.STDOUT,
-            text=True,
-            bufsize=0,
-        )
-
-    def _read_until(self, proc, token, timeout=5.0, max_bytes=1_000_000):
-        start = time.time()
-        buf = []
-        r = proc.stdout.read
-        while True:
-            if time.time() - start > timeout:
-                tail = ''.join(buf)[-500:]
-                raise TimeoutError(f"Timeout waiting for '{token}'. Got so far:\n{tail}")
-            ch = r(1)
-            if ch == "" and proc.poll() is not None:
-                raise RuntimeError(f"Process ended while waiting for '{token}'. Output:\n{''.join(buf)}")
-            buf.append(ch)
-            if len(buf) > max_bytes:
-                raise RuntimeError("Exceeded max read size")
-            if token in "".join(buf):
-                return "".join(buf)
-
-    def _send_line(self, proc, s: str):
-        proc.stdin.write(s + "\n")
-        proc.stdin.flush()
-
-    def _expect_hex_field(self, text: str, label: str) -> str:
-        m = re.search(rf"{re.escape(label)}\s*:\s*([0-9a-fA-F]+)", text)
-        assert m, f"Missing '{label}' in output. Tail:\n{text[-400:]}"
-        hx = m.group(1)
-        assert self._HEX_RE.match(hx), f"{label} is not hex"
-        return hx
-
-    def distribute(self, flag):
-        try:
-            os.makedirs(os.path.dirname(self.flag_location), exist_ok=True)
-            with open(self.flag_location, 'w') as f:
-                f.write(flag)
-
-            os.makedirs(os.path.dirname(self.history_location), exist_ok=True)
-            with open(self.history_location, 'a') as f:
-                f.write(flag + '\n')
-
-            self.logger.info(f'Flag {flag} written to {self.flag_location}')
-            return True
-        except Exception as e:
-            self.logger.error(f'Could not write flag to {self.flag_location}: {e}')
-            return False
-
-                
-    def register(self, proc, name, level, timeout=1.):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, "1")
-        self._read_until(proc, ": ", timeout=timeout)
-        self._send_line(proc, name)
-        self._read_until(proc, ": ", timeout=timeout)
-        self._send_line(proc, str(level))
-
-    def login(self, proc, name, timeout=1.):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, "2")
-        self._read_until(proc, ": ", timeout=timeout)
-        self._send_line(proc, name)
-
-    def list_user(self, proc, timeout=1.):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, "3")
-        return self._read_until(proc, "\n1. register")
-    
-    def bini(self, proc, id, data, timeout=1.0):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, str(id))
-        self._read_until(proc, ": ", timeout=timeout)
-        self._send_line(proc, data)
-
-    def logout(self, proc, timeout=1.):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, "4")
-
-    def exit(self, proc, timeout=1.):
-        self._read_until(proc, "> ", timeout=timeout)
-        self._send_line(proc, "3")
-
-    def check(self):
-        try:
-            with open(self.flag_location, 'r') as f:
-                host_flag = f.read().strip()
-            container_flag = self._read_container_flag()
-            assert host_flag == container_flag, 'Flag mismatch between host and container'
-            self.logger.info('[ok] flag parity (carbeat)')
-
-            proc = self._spawn()
-
-            self.register(proc, "karbit", 1337)
-            
-            name = self.list_user(proc)
-            assert "karbit" in name
-            
-            self.login(proc, "karbit")
-            self.bini(proc, 1, "waguri")
-            self.bini(proc, 2, "0")
-            waguri = self._read_until(proc, "0. edit", timeout=1.)
-            assert "waguri" in waguri
-            
-            self.bini(proc, 3, "0")
-            self.logout(proc)
-            self.exit(proc)
-            
-            try:
-                proc.wait(timeout=2.0)
-            except subprocess.TimeoutExpired:
-                proc.kill()
-                raise AssertionError("Program did not exit after option 3")
-            self.logger.info("[ok] service exit on 3")
-
-            proc_alarm = self._spawn()
-            self._read_until(proc_alarm, "zzz", timeout=190.0)  # 180s + slack
-            try:
-                proc_alarm.wait(timeout=5.0)
-            except subprocess.TimeoutExpired:
-                proc_alarm.kill()
-                raise AssertionError("Alarm fired but process did not exit")
-            self.logger.info("[ok] alarm fired ('zzz') and process self-terminated")
-
-            self.logger.info('Check passed for carbeat')
-            return True
-
-        except Exception as e:
-            self.logger.error(f'Could not check carbeat: {e}')
-            return False
\ No newline at end of file