Shloka 20
उपायधर्म-सेनायोगः
Upāya-dharma and Senāyoga: Expedient Ethics & Army Deployment
यतो वायुर्यत: सूर्यो यत: शुक्रस्ततो जय: । पूर्व पूर्व ज्याय एषां संनिपाते युधिषछ्िर
yato vāyur yataḥ sūryo yataḥ śukras tato jayaḥ | pūrvaḥ pūrvaḥ jyāya eṣāṁ sannipāte yudhiṣṭhira ||
毗湿摩说道：“作战若能以风来之向、日之所在、以及金星（舒克罗）显现之向为背后，则可得胜。噢，坚战（Yudhiṣṭhira），若此三者分处异方，不能尽皆相合，则先所言者为上——故但令风在背后，纵使日与金星在前，亦仍可有效交战。”
भीष्म उवाच
Educational Q&A
Bhīṣma teaches that practical factors—wind direction, the sun’s position, and the auspicious/visible placement of Venus—can influence battlefield advantage; when they conflict, prioritize them in the order stated, with the wind as the foremost consideration.
In the Śānti Parva, Bhīṣma instructs Yudhiṣṭhira on aspects of righteous rule and conduct, including pragmatic counsel for warfare; here he gives directional guidance for arranging one’s position in battle to improve the chances of victory.