Two Common Chess Sins:
1. Ignoring or not noticing pertinent threats made by the opponent. "The opponent deserves to exist"- GM Tartakower
2. Reacting too passively to a threat by the opponent. Sometimes even seeing "phantom threats" or perceived powerful moves by the opponent that not indeed so. "It is important to respect the opponent, but not to diefy him"- NM Clawitter
"Krav Maga Chess"
Krav Maga is the art of defending while attacking. This is a perfect way to play in chess. Great players try to find their opponents intentions, and instead of bowing down to them, they try to find a way crush them or better yet, ignore them without consequence.
What follows is an easy example of the 2 chess sins and krav maga chess. There will be future blog posts on how to play "krav maga chess" but for now it's important to get the general idea. Play over the game and it will invariably help your chess and your ability to solve future krav maga chess exercises.