diff --git a/src/go.py b/src/go.py
--- a/src/go.py
+++ b/src/go.py
@@ -1,13 +1,9 @@
 import logging as log
 
+from util import EMPTY,BLACK,WHITE,colorNames
 from gamerecord import GameRecord
 
 
-EMPTY=0
-BLACK=1
-WHITE=-1
-
-
 class Go:
 	## Initializes self.board to a list[r][c]=EMPTY.
 	def __init__(self,boardSize=19):
@@ -24,7 +20,7 @@ class Go:
 	#  @param color BLACK or WHITE
 	#  @return True on success, False on failure (illegal move)
 	def move(self,color,row,col):
-		if color!=self.toMove: log.warning("move by %s out of order",color)
+		if color!=self.toMove: log.warning("move by %s out of order",colorNames[color])
 		if self.board[row][col]!=EMPTY: return False
 
 		self.board[row][col]=color