To Chip Away the Edges
A heuristic for attacking the weak spots in an opponent's defenses, gradually wearing them down until a decisive strike is possible.
THE IDEA
TO CHIP AWAY THE EDGES
Sometimes you must make sacrifices in your attack in order to weaken the enemy and chip away at his defenses. If you find that it is difficult for you to penetrate strong armor, then go to the areas where the armor is weak and you will eventually break through. There are weak spots in all armor. If you continue to chip away at the weak spots in the enemy’s armor, he will eventually weaken and lose balance. The reason there are weak spots in armor is because these are the places that have to be “open” in order to provide flexibility in the enemy’s movements. Go to these areas and slowly whittle him down; when you have the opportunity to go in for the kill, strike with absolute conviction. Do not hesitate. Destroy the enemy!
When to use it
Competitive business strategy: entering a market by focusing on segments that incumbents neglect.
Personal development: breaking a bad habit by addressing its easiest‐to‑change trigger first.
Negotiation: weakening the other side's resolve by winning small concessions on non‑critical points before demanding the main concession.
Military or game strategy: wearing down an opponent's resources and morale through repeated small engagements rather than one big battle.
FROM THEORY TO EVERYDAY LIFE
In practice
Business Competition – Undermining a Market Leader
A small startup competing against an established industry giant cannot match the giant's resources in a head‑on marketing battle. Instead, the startup identifies a niche segment where the giant's product is overpriced or outdated (a 'weak spot') and focuses all efforts there. By steadily capturing that segment and eroding the giant's customer base, the startup eventually weakens the giant's overall market position and can then launch a broader assault.
Military Tactics – Siege Warfare
A besieging army cannot easily breach the main walls of a fortress. The commander orders repeated, small‑scale attacks on the weakest gate – the one less reinforced – diverting the defenders' attention and supplies. Over weeks, the gate is chipped away until a breach is made. The army then pours through with full force.
A MOMENT TO REFLECT
Put it to work.
In a current project or challenge, what are the strongest defenses (obstacles) you face, and what are the weak spots you could target instead?
How can you make small sacrifices (time, resources, comfort) to gradually erode a competitor's advantage?
What signals would tell you that the opponent is sufficiently weakened that a decisive strike is possible? How do you prepare for that moment?
Often confused with
CONTINUE THE CONVERSATION
Source texts
- Musashis book of five rings the definitive interpretation of Miyamoto Musashis classic book of strategy (Kaufman, SteveMiyamoto, Musashi)