Qinoa Igo
Keywords: Software
Qinoa Igo (きのあ囲碁) is a web-based Go-playing software. You can play several characters who have different strengths and styles. Board sizes are 9x9, 13x13 and 19x19. Though the site is Japanese, English translations are provided for basic navigation.
https://igo.qinoa.com/ja/