@techreport{oai:ipsj.ixsq.nii.ac.jp:00061656,
 author = {鎌田, 真人 and Kamada, Masahito},
 issue = {27(2009-GI-21)},
 month = {Mar},
 note = {９路盤囲碁は，囲碁の入門用に使われているだけでなく，プロ棋士同士の対局やコンピュータ囲碁大会でも行われている。今回，1968年～2009年1月に行われたプロ棋士対プロ棋士の９路盤囲碁の棋譜846局の序盤の変化を分析した。19路盤に比べると棋譜の数が非常に少なく，また持ち時間も少ないが，プロ棋士の長年の研究の成果が窺える。当初は，初手天元が多かったが，コミが5目半から6目半に変わった頃から，初手３四，４四，４五が増えてきた。ほとんど打たれなくなった手や，結論が出ているのに打たれている手も見られる。また，初手から同じ手順の棋譜が多く見られ，定石化されてきたと思われる手順もある。, Go on the 9x9 board is played not only by beginner Go players, but also in computerized Go championships and in games between professional players. I examined the 846 game records by professional players on the 9x9 board held over the period of 1968-Janaury 2009 to analyze changes in the opening moves of the game. Compared with Go on the 19x19 board, there are far fewer game records, and the players are allotted less “thinking time”; however, the records do give us an idea of the achievements of professional Go players in their study of the game over many years. Previously, the game was started by tengen. However, due to the shift from 5.5 to 6.5 Komi, 3-4, 4-4, and 4-5 first moves have become more common. Some moves are rarely used anymore, and other moves are used even when it is clear to the players what will happen next. Game records also show that players are using the same patterns, starting with the opening move, indicating a solidification of certain patterns.},
 title = {プロプロ９路盤囲碁の序盤の変化（その１）},
 year = {2009}
}