diff --git a/src/image_analyzer.py b/src/image_analyzer.py
--- a/src/image_analyzer.py
+++ b/src/image_analyzer.py
@@ -2,47 +2,47 @@
 
 
 class ImageAnalyzer:
-  
-  def __init__(self):
-    self.board=[[Go.EMPTY]*19 for r in range(19)]
-    self.grid=None
-  
-  def analyze(self,image,tresB,tresW,sizeCoef,shift):
-    if self.grid==None: return False
-    
-    for r in range(19):
-      for c in range(19):
-        intersection=self.grid.intersections[r][c]
-        
-        self.board[r][c]=self.analyzePoint(image,intersection*sizeCoef+shift,*(self.grid.stoneSizeAt(r,c,sizeCoef)),tresB,tresW)
-  
-  def analyzePoint(self,image,imageCoords,stoneWidth,stoneHeight,tresB,tresW):
-    b=w=e=0
+
+	def __init__(self):
+		self.board=[[Go.EMPTY]*19 for r in range(19)]
+		self.grid=None
+
+	def analyze(self,image,tresB,tresW,sizeCoef,shift):
+		if self.grid==None: return False
 
-    ((x1,y1),(x2,y2))=self.relevantRect(imageCoords,stoneWidth,stoneHeight)
+		for r in range(19):
+			for c in range(19):
+				intersection=self.grid.intersections[r][c]
+
+				self.board[r][c]=self.analyzePoint(image,intersection*sizeCoef+shift,*(self.grid.stoneSizeAt(r,c,sizeCoef)),tresB,tresW)
+
+	def analyzePoint(self,image,imageCoords,stoneWidth,stoneHeight,tresB,tresW):
+		b=w=e=0
+
+		((x1,y1),(x2,y2))=self.relevantRect(imageCoords,stoneWidth,stoneHeight)
 
-    for y in range(y1,y2+1):
-      for x in range(x1,x2+1):
-        red,green,blue=image.getpixel((x,y))
-        
-        I=(red+green+blue)/255/3
-        m=min(red,green,blue)
-        S=1-m/I
-        if 100*I<tresB: b+=1
-        elif 100*I>tresW: w+=1
-        else: e+=1
-        
-    if b>=w and b>=e: return Go.BLACK
-    if w>=b and w>=e: return Go.WHITE
-    return Go.EMPTY
+		for y in range(y1,y2+1):
+			for x in range(x1,x2+1):
+				red,green,blue=image.getpixel((x,y))
+
+				I=(red+green+blue)/255/3
+				m=min(red,green,blue)
+				S=1-m/I
+				if 100*I<tresB: b+=1
+				elif 100*I>tresW: w+=1
+				else: e+=1
 
-  def relevantRect(self,imageCoords,stoneWidth,stoneHeight):
-    x=int(imageCoords.x)
-    y=int(imageCoords.y)
-    xmax=max(int(stoneWidth*2//7), 2) # !! optimal parameters subject to further research
-    ymax=max(int(stoneHeight*2//7), 2)
+		if b>=w and b>=e: return Go.BLACK
+		if w>=b and w>=e: return Go.WHITE
+		return Go.EMPTY
 
-    return ((x-xmax,y-ymax), (x+xmax,y+ymax))
-    
-  def setGrid(self,grid):
-    self.grid=grid
+	def relevantRect(self,imageCoords,stoneWidth,stoneHeight):
+		x=int(imageCoords.x)
+		y=int(imageCoords.y)
+		xmax=max(int(stoneWidth*2//7), 2) # !! optimal parameters subject to further research
+		ymax=max(int(stoneHeight*2//7), 2)
+
+		return ((x-xmax,y-ymax), (x+xmax,y+ymax))
+
+	def setGrid(self,grid):
+		self.grid=grid