diff --git a/src/diana/sgfParser/node.py b/src/diana/sgfParser/node.py
--- a/src/diana/sgfParser/node.py
+++ b/src/diana/sgfParser/node.py
@@ -1,4 +1,5 @@
 from collections import deque
+import logging as log
 
 from . import skipWhitespace, ParserWarning
 from .property import Property, GAME_INFO
@@ -23,8 +24,7 @@ class Node:
 		while Property.fits(s,i):
 			i,x=Property.create(s,i)
 			if x.name in res.properties:
-				# !! raise or log or ignore
-				raise ParserWarning('duplicate "{0}" property in a node. second value ignored'.format(x.name),s,i)
+				log.warning(ParserWarning('duplicate "{0}" property in a node. second value ignored'.format(x.name),s,i))
 			else:
 				res.properties[x.name]=x
 			i=skipWhitespace(s,i)
diff --git a/src/diana/sgfParser/property.py b/src/diana/sgfParser/property.py
--- a/src/diana/sgfParser/property.py
+++ b/src/diana/sgfParser/property.py
@@ -1,4 +1,5 @@
 import re
+import logging as log
 
 from .propValues import choose, singleton, listOf, compose, number, real, double, color, text, empty, anything, point, move, stone
 from . import skipWhitespace, ParserError
@@ -24,7 +25,12 @@ class Property:
 		res=Property()
 		i,res.name=Property.ident(s,start)
 		i=skipWhitespace(s,i)
-		i,x=Property.createValue(s,i,res.name)
+		try:
+			i,x=Property.createValue(s,i,res.name)
+		except ParserError as e: # malformed value
+			log.warning(e)
+			i,x=choose(listOf(anything), singleton(anything))(s,i)
+			res.name="_"+res.name
 		res.value=x
 		i=skipWhitespace(s,i)
 		return (i,res)