never attack unless you have lead in development and have control in the center. second follow the plus 2 rule. always attack when you have two plus more attackers than their defenders. not all attacks lead to checkmate sometimes a good position where its easy to win from or material advantage. best way to start an attack is to expose the enemy king with sac, btw you must plan it and not just sac your pieces hoping the enemy gonna make the moves you want, FORCING MOVES FIRST they say final tip its easier to attack then defend, SMASH YOUR ENEMIES BEFORE THEY SMASH YOU