หมากล้อม
จากหนังสือ Opening theory made Easy by Otake, Hideo Principle 1 : Corner exclosures aim at side extensions Principle 2 : Be flexible in deploying the star point Principle 3 : Find the right pincer Principle 4 : Have a counterplan to deal with invasions Principle 5 : The 5-4 stone aims at outside influence