diff --git a/ttrs.py b/ttrs.py
index 1d8c738..3eed636 100755
--- a/ttrs.py
+++ b/ttrs.py
@@ -235,40 +235,83 @@ class TestTtrsPlayer(TtrsPlayer):
 class BalanceTtrsPlayer(TtrsPlayer, threading.Thread):
     def __init__(self, playground, addr, player_id):
         self.playground = playground
+        self.addr = addr
         self.player_id = player_id
+        self.evt = None
+        self.oldevt = None
         threading.Thread.__init__(self, daemon=True)
         self.start()
 
     def run(self):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        sock.connect(addr)
+        try:
+            sock.connect(self.addr)
+        except ConnectionRefusedError:
+            print('could not connect to balance server', file=sys.stderr)
+            self.evt = PlayerEvent.QUIT
+            return
         self.running = True
+        evt = None
+        oldevt = None
+        lastchange = 0
         while self.running:
             sock.send(b'a')
             data = sock.recv(4)
-            p0x, p0y, p2x, p2y = struct.unpack('bbbb', data)
+            p0x, p0y, p1x, p1y = struct.unpack('bbbb', data)
             if self.player_id == 0:
-                self.__calc_event(p0x, p0y)
+                xbal, ybal = p0x, p0y
             elif self.player_id == 1:
-                self.__calc_event(p1x, p1y)
-            time.sleep(0.01)
-
-    def __calc_event(self, xbal, ybal):
-        if self.ybal > 50:
-            return PlayerEvent.ROTATE
-
-        MAX_Y_AMPLITUDE = 65
-        bal = self.xbal
-        normbal = (bal + MAX_Y_AMPLITUDE) / (2 * MAX_Y_AMPLITUDE)
-        px = round(normbal * (self.playground.width - 1))
-        print('player %d balance=%d pos=%d' % (self.player_id, bal, px))
-        if minopos.x > px:
-            return PlayerEvent.MOVE_LEFT
-        elif minopos.x < px:
-            return PlayerEvent.MOVE_RIGHT
-
-        if self.ybal < -50:
-            return PlayerEvent.DROP
+                xbal, ybal = p1x, p1y
+
+            print('player_id=%d xbal=%d ybal=%d' % (self.player_id, xbal, ybal))
+            if xbal == -128 or ybal == -128:
+                self.evt = PlayerEvent.QUIT
+                self.running = False
+                break
+
+            THRESHOLD = 40
+            if abs(xbal) < THRESHOLD and abs(ybal) < THRESHOLD:
+                evt = None
+            else:
+                if abs(xbal) < abs(ybal):
+                    if ybal > 0:
+                        evt = PlayerEvent.ROTATE
+                    else:
+                        evt = PlayerEvent.DROP
+                else:
+                    if xbal > 0:
+                        evt = PlayerEvent.MOVE_RIGHT
+                    else:
+                        evt = PlayerEvent.MOVE_LEFT
+
+            MIN_TIMES = {
+                PlayerEvent.MOVE_LEFT: 0.1,
+                PlayerEvent.MOVE_RIGHT: 0.1,
+                PlayerEvent.ROTATE: 0.1,
+                PlayerEvent.DROP: 0.3,
+            }
+            if evt != oldevt:
+                lastchange = time.time()
+                oldevt = evt
+
+            if time.time() - lastchange < MIN_TIMES.get(evt, 0):
+                print('player_id=%d debounce %s' % (self.player_id, evt))
+                continue
+
+            if evt == PlayerEvent.ROTATE:
+                if self.lastevt != PlayerEvent.ROTATE:
+                    self.evt = evt
+            else:
+                self.evt = evt
+            self.lastevt = evt
+            print('player_id=%d event=%s' % (self.player_id, self.evt))
+
+
+
+    def get_event(self):
+        evt = self.evt
+        self.evt = None
+        return evt
 
         
 class TtrsGame(threading.Thread):
@@ -296,7 +339,7 @@ class TtrsGame(threading.Thread):
         mino = None
         TICK_TIME = 0.1
         FALL_INTERVAL = 5
-        MOVE_INTERVAL = 2
+        MOVE_INTERVAL = 1
         ticks = 0
         lastfall = 0
         lastmove = 0
@@ -412,7 +455,7 @@ if __name__ == '__main__':
                         help='number of players')
     parser.add_argument('--pygame', dest='pygame', action='store_true',
                         help='use pygame as input')
-    parser.add_argument('--balance', dest='balance', type=str, nargs=1,
+    parser.add_argument('--balance', dest='balance', type=str,
                         metavar='HOST:PORT', help='use balance input')
     parser.add_argument('--out', dest='out', type=str, metavar='OUTPUT',
                         default='e3blp', help='blup output specification')