{"links":{},"id":2009458,"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:02009458","sets":["1164:5305:1771205017738:1777430788228"]},"path":["1777430788228"],"owner":"80578","recid":"2009458","title":["どうぶつしょうぎにおける周期8万手超の千日手"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2026-05-08"},"_buckets":{"deposit":"de4bf9e9-8af4-4e3f-a2c5-972e45af0fba"},"_deposit":{"id":"2009458","pid":{"type":"depid","value":"2009458","revision_id":0},"owners":[80578],"status":"published","created_by":80578},"item_title":"どうぶつしょうぎにおける周期8万手超の千日手","author_link":[],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"どうぶつしょうぎにおける周期8万手超の千日手","subitem_title_language":"ja"},{"subitem_title":"Over-80,000-Ply Repetition Cycle in Dobutsu Shogi","subitem_title_language":"en"}]},"item_type_id":"4","publish_date":"2026-05-08","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"亜細亜大学経営学部データサイエンス学科"}]},"item_4_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Department of Data Science, Faculty of Business Administration, Asia University","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing file","attribute_type":"file","attribute_value_mlt":[{"url":{"url":"https://ipsj.ixsq.nii.ac.jp/record/2009458/files/IPSJ-GI26058006.pdf","label":"IPSJ-GI26058006.pdf"},"date":[{"dateType":"Available","dateValue":"2028-05-08"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-GI26058006.pdf","filesize":[{"value":"2.1 MB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"18"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"a8905139-c10d-4214-82a0-dc1a727c2dd5","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2026 by the Information Processing Society of Japan"}]},"item_4_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"平岡,和幸"}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11362144","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8736","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"どうぶつしょうぎにおける長周期千日手の存在を例示する。3×4の狭い盤面にも関わらず、この手順による同一局面の反復周期は8万手を超え、1手1秒でも一周23時間を要する。周期中の双方の着手はすべて、その局面での最善手（引き分けを保つ手）の一つであり、勝敗をくつがえす悪手は含まれない。このような長い千日手が生じ得る背景には、引き分け局面の遷移グラフが持つ目立った特徴として、約30万局面からなる巨大な強連結成分の存在がある。","subitem_description_type":"Other"}]},"item_4_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"We present an example demonstrating the existence of a long period repetition in Dobutsu Shogi, a variant of Japanese chess. Despite the small 3 × 4 board, the repetition cycle of identical positions generated by this sequence exceeds 80,000 plies, requiring 23 hours to complete a full cycle even at a rate of one ply per second. Throughout the cycle, every move by both players is one of the optimal moves available in the given position, i.e., a move that preserves the draw; no move that would alter the game-theoretic outcome is involved. A key structural factor underlying the possibility of such a long repetition is the existence of a giant strongly connected component, consisting of roughly 300,000 positions, in the transition graph of drawn positions.","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"8","bibliographic_titles":[{"bibliographic_title":"研究報告ゲーム情報学（GI）"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2026-05-08","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicVolumeNumber":"2026-GI-58"}]},"relation_version_is_last":true,"weko_creator_id":"80578"},"created":"2026-04-30T08:47:48.266165+00:00","updated":"2026-04-30T08:47:52.484991+00:00"}