As it is commented that against Sansa, Rigen's handicap was half-stone and against Doseki he played with no handicap ("Todaiki," 1607), they seemed to play close games, even in case of Tagaisen (making the first move in alternate games).
また利玄の手合は算砂に半子、道碩に同じとも評されており（『当代記』1607年）、互先でも好勝負の棋力であったと見られる。