diff --git a/src/go.py b/src/go.py
--- a/src/go.py
+++ b/src/go.py
@@ -1,57 +1,57 @@
-EMPTY=0
-BLACK=1
-WHITE=-1
-
-
-class Go:
-	## Initializes self.board to a list[r][c]=EMPTY.
-	def __init__(self,boardSize=19):
-		self.boardSize=boardSize
-		self.board=[[EMPTY]*self.boardSize for x in range(boardSize)]
-
-	## Executes a move.
-	#
-	#  Doesn't check for kos. Suicide not allowed.
-	#
-	#  @param color BLACK or WHITE
-	#  @return True on success, False on failure (illegal move)
-	def move(self,color,row,col):
-		if self.board[row][col]!=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()
-
-		# check for suicide
-		self.temp=[[False]*self.boardSize for x in self.board]
-		if not self._floodFill(color,row,col):
-			self.board[row][col]=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]==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]=EMPTY
-
-
-def exportBoard(board):
-	substitutions={EMPTY:".", BLACK:"X", WHITE:"O"}
-	return "\n".join("".join(substitutions.get(x,"?") for x in row) for row in board)
+EMPTY=0
+BLACK=1
+WHITE=-1
+
+
+class Go:
+	## Initializes self.board to a list[r][c]=EMPTY.
+	def __init__(self,boardSize=19):
+		self.boardSize=boardSize
+		self.board=[[EMPTY]*self.boardSize for x in range(boardSize)]
+
+	## Executes a move.
+	#
+	#  Doesn't check for kos. Suicide not allowed.
+	#
+	#  @param color BLACK or WHITE
+	#  @return True on success, False on failure (illegal move)
+	def move(self,color,row,col):
+		if self.board[row][col]!=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()
+
+		# check for suicide
+		self.temp=[[False]*self.boardSize for x in self.board]
+		if not self._floodFill(color,row,col):
+			self.board[row][col]=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]==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]=EMPTY
+
+
+def exportBoard(board):
+	substitutions={EMPTY:".", BLACK:"X", WHITE:"O"}
+	return "\n".join("".join(substitutions.get(x,"?") for x in row) for row in board)