diff --git a/src/diana/sgfParser.py b/src/diana/sgfParser.py
--- a/src/diana/sgfParser.py
+++ b/src/diana/sgfParser.py
@@ -15,6 +15,10 @@ class Collection:
 		while x is not None:
 			self.gameTrees.append(x)
 			i,x=GameTree.create(s,i)
+
+	def listGames(self):
+		for tree in self.gameTrees:
+			for game in tree.listGames(): yield game
 	
 class GameTree:
 	def __init__(self):
@@ -46,6 +50,29 @@ class GameTree:
 			# print("error when parsing GameTree")
 			return (i,None)
 		return (i+1,res)
+
+	## Expand multiple games into distinct GameTrees and yield each.
+	def listGames(self):
+		for node in self._listGINodes():
+			yield self._buildSubtree(node)
+
+	## Create and return a new GameTree containing the provided Node.
+	#
+	# The Node objects are shared between the trees, not copied.
+	def _buildSubtree(self,node):
+		res=GameTree()
+
+		return res
+		# chci celou cestu ke kořeni a všechny podstromy nodu
+
+	## Find and yield Game Info nodes.
+	def _listGINodes(self):
+		for node in self.nodes:
+			if node.isGINode():
+				yield node
+		for tree in self.branches:
+			for node in tree._listGINodes():
+				yield node
 	
 class Node:
 	def __init__(self):
@@ -68,7 +95,10 @@ class Node:
 			i=skipWhitespace(s,i)
 			i,x=Property.create(s,i)
 		return (i,res)
-		
+
+	def isGINode(self):
+		return any(prop.type==Property.GAME_INFO for prop in self.properties.values())
+
 	def setProperty(self,name,value):
 		self.properties[name]=value
 		# zkontrolovat typ value
@@ -78,6 +108,9 @@ class Node:
 		else: return None
 	
 class Property:
+	GAME_INFO=1
+	UNKNOWN=99
+
 	def __init__(self):
 		self.name=""
 		self.value=""
@@ -102,6 +135,12 @@ class Property:
 		if m is None: return (start,None)
 		return (m.end(),m.group())
 
+	@property
+	def type(self):
+		gameInfo=["AN","BR","BT","CP","DT","EV","GN","GC","ON","OT","PB","PC","PW","RE","RO","RU","SO","TM","US","WR","WT"]
+		if self.name in gameInfo: return Property.GAME_INFO
+		else: return Property.UNKNOWN
+
 class PropValue:
 	def __init__(self):
 		self.type=""