Tips for Christmas Tree Light Up

Simple Rules

There are a few simple rules for you to follow:

• The correct solution will not have open ends, nor will it have loops.
• Start from the edges, e.g.:
  
  
  
  
  
  
• A cross must have all the adjacent blocks point to it:
  
  
  
  
  
  
• Keep in mind the blocks which you are certain about their orientation, e.g.:
  
  The highlighted block can have a number of different orientations:
  
  
  But if you know that the orientation of the bulb is correct, then the highlighted block can only be oriented as follows:
  
  
  

Click the following button to play this game now: