This game is actually quite easy if you can use logic to make deductions. Life will be easier if you can remember these patterns:

Basic Patterns:












Loop Avoidance Patterns:






X2Y Patterns:









There are many variations of X2Y patterns. In general, if you have a row of pillars marked X, 2, 2, ..., 2, Y, then the total number of walls connecting to X and Y are X + Y - 2.