स एव पक्षकक्षाभ्यां प्रतिक्रान्तो दृढकः ॥ कZ_१०.६.१० ॥
sa eva pakṣakakṣābhyāṃ pratikrānto dṛḍhakaḥ
Susunan yang sama itu, apabila ditarik ke belakang/diimbangi berbanding sayap dan sisi (pakṣa-kakṣa), disebut ‘Dṛḍhaka’ (susunan yang diperkukuh/ketat).
It prioritizes holding power and controllability—shorter forward exposure reduces coordination burden and strengthens the line against shock.