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  • df pn アルゴリズム ノ ツメショウギ オ トク プログラム エ ノ オウヨウ
  • Application of df-pn Algorithm to a Program to Solve Tsume-shogi Problems
  • アルゴリズム理論

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During this decade, a study of programs to solve Tsume-Shogi problemshas greatly advanced. This is due to the development ofthe concept of a proof number and a disproof number.Allis' pn-search is the most naive best-first algorithm that usesboth proof numbers and disproof numbers on equal terms.We already developed a df-pn algorithm which is a depth-firstalgorithm that behaves the same as pn-search.In this paper, we applied df-pn algorithm to a program solvingTsume-Shogi problems. Moreover, we propose some techniqueswhich we imported during implementing the program.As a result, by these techniques implemented on df-pn,our program solved all the Tsume-Shogi problems,for the first time, that require over 300 plies to reach to the checkmate.


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