diff --git a/src/analyzer/framecache.py b/src/analyzer/framecache.py
new file mode 100644
--- /dev/null
+++ b/src/analyzer/framecache.py
@@ -0,0 +1,12 @@
+from collections import deque
+
+
+class FrameCache:
+	def __init__(self,capacity=600): # 600 is enough for 10 min of 1 fps
+		self._capacity=capacity
+		self._cache=deque()
+
+	def put(self,frame):
+		if len(self._cache)>=self._capacity:
+			self._cache.popleft()
+		self._cache.append(frame)
diff --git a/src/core.py b/src/core.py
--- a/src/core.py
+++ b/src/core.py
@@ -6,6 +6,7 @@ import PIL
 from util import MsgQueue
 from gui import gui
 from analyzer import ImageAnalyzer
+from analyzer.framecache import FrameCache
 from go.core import Go, isLegalPosition
 from statebag import StateBag
 import config as cfg
@@ -18,6 +19,7 @@ class Core:
 		self.grid=None
 		self.go=Go()
 		self.detector=ImageAnalyzer()
+		self._cache=FrameCache()
 		self.states=StateBag()
 
 		self._ownMessages=MsgQueue(self._handleEvent)
@@ -50,6 +52,7 @@ class Core:
 
 	def analyze(self):
 		if self.detector.analyze(self._frame):
+			self._cache.put(self._frame)
 			if isLegalPosition(self.detector.board):
 				state=self.states.pushState(self.detector.board)
 				rec=[]