diff --git a/src/go.py b/src/go.py
--- a/src/go.py
+++ b/src/go.py
@@ -1,51 +1,51 @@
 class Go:
-  EMPTY=0
-  BLACK=1
-  WHITE=-1
-  
-  ## Initializes self.board to a list[r][c]=Go.EMPTY.
-  def __init__(self,boardSize=19):
-    self.boardSize=boardSize
-    self.board=[[Go.EMPTY]*self.boardSize for x in self.board]
-  
-  ## Executes a move.
-  #  
-  #  Doesn't check for kos. Suicide not allowed.
-  #  
-  #  @param color Go.BLACK or Go.WHITE
-  #  @return True on success, False on failure (illegal move)
-  def move(self,color,row,col):
-    if self.board[row][col]!=Go.EMPTY: return False
+	EMPTY=0
+	BLACK=1
+	WHITE=-1
+
+	## Initializes self.board to a list[r][c]=Go.EMPTY.
+	def __init__(self,boardSize=19):
+		self.boardSize=boardSize
+		self.board=[[Go.EMPTY]*self.boardSize for x in self.board]
 
-    self.board[row][col]=color
+	## Executes a move.
+	#
+	#  Doesn't check for kos. Suicide not allowed.
+	#
+	#  @param color Go.BLACK or Go.WHITE
+	#  @return True on success, False on failure (illegal move)
+	def move(self,color,row,col):
+		if self.board[row][col]!=Go.EMPTY: return False
+
+		self.board[row][col]=color
+
+		# capture neighbors
+		for r,c in ((-1,0),(1,0),(0,-1),(0,1)):
+			self.temp=[[False]*self.boardSize for x in self.board]
+			if not self._floodFill(-color,row+r,col+c): self._remove()
 
-    # capture neighbors
-    for r,c in ((-1,0),(1,0),(0,-1),(0,1)):
-      self.temp=[[False]*self.boardSize for x in self.board]
-      if not self._floodFill(-color,row+r,col+c): self._remove()
-    
-    # check for suicide
-    self.temp=[[False]*self.boardSize for x in self.board]
-    if not self._floodFill(color,row,col):
-      self.board[row][col]=Go.EMPTY
-      return False
-    return True
-    
-  ## Checks for liberties of a stone at given coordinates.
-  #  
-  #  The stone's group is marked with True in self.temp, ready for capture if needed. Recursively called for stone's neighbors.
-  #  
-  #  @return True if alive, False if captured
-  def _floodFill(self,color,row,col):
-    if col<0 or col>=self.boardSize or row<0 or row>=self.boardSize: return False # out of range
-    if self.temp[row][col]: return False # already visited
-    if self.board[row][col]==Go.EMPTY: return True # found a liberty
-    if self.board[row][col]!=color: return False # opponent's stone
-    self.temp[row][col]=True # set visited
-    return self._floodFill(color,row,col-1) or self._floodFill(color,row,col+1) or self._floodFill(color,row-1,col) or self._floodFill(color,row+1,col) # check neighbors
-  
-  ## Removes stones at coordinates marked with True in self.temp.
-  def _remove(self):
-    for r in range(self.boardSize):
-      for c in range(self.boardSize):
-        if self.temp[r][c]: self.board[r][c]=Go.EMPTY
+		# check for suicide
+		self.temp=[[False]*self.boardSize for x in self.board]
+		if not self._floodFill(color,row,col):
+			self.board[row][col]=Go.EMPTY
+			return False
+		return True
+
+	## Checks for liberties of a stone at given coordinates.
+	#
+	#  The stone's group is marked with True in self.temp, ready for capture if needed. Recursively called for stone's neighbors.
+	#
+	#  @return True if alive, False if captured
+	def _floodFill(self,color,row,col):
+		if col<0 or col>=self.boardSize or row<0 or row>=self.boardSize: return False # out of range
+		if self.temp[row][col]: return False # already visited
+		if self.board[row][col]==Go.EMPTY: return True # found a liberty
+		if self.board[row][col]!=color: return False # opponent's stone
+		self.temp[row][col]=True # set visited
+		return self._floodFill(color,row,col-1) or self._floodFill(color,row,col+1) or self._floodFill(color,row-1,col) or self._floodFill(color,row+1,col) # check neighbors
+
+	## Removes stones at coordinates marked with True in self.temp.
+	def _remove(self):
+		for r in range(self.boardSize):
+			for c in range(self.boardSize):
+				if self.temp[r][c]: self.board[r][c]=Go.EMPTY