Taegeuk 3 Jang

Taegeuk 3 Jang symbolizes the "Ra", one of the 8 divination signs, which represent "hot and bright". This is to encourage the trainees to harbor a sense of justice and ardor for training. A successful accomplishment of this poomsae will give the trainees a promotion to a blue belt. New actions are sonnal-mok-chigi and sonnal -makki and dwit-kubi stance. This poomsae is characterized by successive makki and chigi, and continued jireugis. Emphasis is laid on the counterattacks against the opponent's chigi. The 6th Kup-grade trainees practice this poomsae.

http://www.wtf.org/wtf_eng/site/about_taekwondo/poomsae.html