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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4575

Title: 将棋終盤で発展してきた探索手法のLines of Actionへの適用(<特集>ゲームプログラミング)
Authors: 作田, 誠
長嶋, 淳
橋本, 剛
飯田, 弘之
Issue Date: 2002-10-15
Publisher: 情報処理学会
Magazine name: 情報処理学会論文誌
Volume: 43
Number: 10
Start page: 2964
End page: 2972
Abstract: 将棋終盤の探索で成功しているλ^1-探索(詰み探索)とキラー木ヒューリスティクス(詰み部分木の応用)を,Lines of Actionの終盤探索において,反復深化法およびPDSに組み込む形でテストした.λ^1-探索はそのまま生成着手を限定した形では勝ち手順を見つける能力は低かった.またλ^1-着手を優先的に並べ替える手法では本質的な探索節点数は少し減少したが,実行効率が悪く解答能力は低下した.キラー木ヒューリスティクスについては,深さ優先探索に組み込むタイプのアルゴリズムを提案し実装.テストした.その結果反復深化法で5%程度,PDSで20%程度の探索節点数・解答時間の減少を達成でき,解答能力も高まった. : This paper examines the application of the λ^1-search and the killer-tree heuristics to the endgame search of Lines of Action. Both methods are incorporated into two depth-first searches: iterative deepening and PDS. The λ^1-search, in which move generation is limited to λ^1-moves, has shown a poor ability to find a winning solution. With using the λ^1-sorting, in which λ^1-moves are sorted at the top, the number of searched nodes has been a little reduced, but the solving ability has declined because of the inefficiency of move generation. A new algorithm, in which the killer-tree heuristics is incorporated into a depth-first search, has been proposed, implemented and evaluated. Then, the number of searched nodes and the solving time has reduced by 5% in iterative deepening and by 20% in PDS. Consequently, the solving ability has been enhanced.
Rights: 社団法人 情報処理学会, 作田 誠, 長嶋 淳, 橋本 剛, 飯田 弘之, 情報処理学会論文誌, 43(10), 2002, 2964-2972. ここに掲載した著作物の利用に関する注意: 本著作物の著作権は(社)情報処理学会に帰属します。本著作物は著作権者である情報処理学会の許可のもとに掲載するものです。ご利用に当たっては「著作権法」ならびに「情報処理学会倫理綱領」に従うことをお願いいたします。 Notice for the use of this material: The copyright of this material is retained by the Information Processing Society of Japan (IPSJ). This material is published on this web site with the agreement of the author (s) and the IPSJ. Please be complied with Copyright Law of Japan and the Code of Ethics of the IPSJ if any users wish to reproduce, make derivative work, distribute or make available to the public any part or whole thereof. All Rights Reserved, Copyright (C) Information Processing Society of Japan.
URI: http://hdl.handle.net/10119/4575
Material Type: publisher
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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