diff --git a/Library_Docs.md b/Library_Docs.md
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+# Libraries Used 
+
+* ## Pygame
+Pygame is a cross-platform set of Python modules designed for writing video games. It includes computer graphics and sound libraries designed to be used with the Python programming language.  
+The link for documentation of the library is given [here](https://www.pygame.org/docs)  
+![pygame](http://www.pygame.org/docs/pygame_logo.gif)
+
+* ## NumPy
+NumPy is a library for the Python programming language, adding support for large, multi-dimensional arrays and matrices, along with a large collection of high-level mathematical functions to operate on these arrays.  
+The link for documentation of the library is given [here](https://docs.scipy.org/doc/numpy-1.13.0/reference)  
+  
+![numpy](https://valohai.com/static/img/support-logos/numpy-simple.svg)
+
+* ## cx_Freeze
+cx_Freeze is a set of scripts and modules for freezing Python scripts into executables, in much the same way that py2exe and py2app do. Unlike these two tools, cx_Freeze is cross platform and should work on any platform that Python itself works on. It supports Python 2.7 or higher (including Python 3).  
+The link for documentation of the library is given [here](https://cx-freeze.readthedocs.io/en/latest)  
+
+## References 
+
+[Wikipedia](https://en.wikipedia.org)  
+[NumPy](http://www.numpy.org)  
+[Pygame](https://www.pygame.org)
diff --git a/README.md b/README.md
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+++ b/README.md
@@ -51,6 +51,7 @@ To make game interesting each player is provided with 8 fences to make opponent'
 * If there is a fence any player cannot move the car over it.A fence can not be overlapped and it cannot pass from the middle of the another fence.  
 * When two cars come face to face, one car can jump over the other in its turn ,also the car can jump to the left or right of the opponent's car,provided there is no fence in the middle.  
 * The car that reaches first on the square having the finish flag of it's color, is declared as the winner.  
+* Two cars coming in each others way do not affect each other.
 
 ## Screenshots
 ![Screenshot01](screenshots/screenshot01.png)