Pac-Man (shogi)

In shogi, the Pac-Man (パックマン pakkuman or 4四歩パックマン yon-yon-fu pakkuman) is a trap opening.

Pac-Man
☖ pieces in hand: –
987654321 
香桂銀金王金銀桂香1
 飛     角 2
歩歩歩歩歩 歩歩歩3
     歩   4
         5
  歩      6
歩歩 歩歩歩歩歩歩7
 角     飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: –

It is named after the video game Pac-Man.

The opening was called 4四歩パックリ yon-yon-fu pakkuri on the NHK shogi television show Shogi Focus (将棋フォーカス).

The opening has an early pawn gambit made by White on the fourth file which may be metaphorically eaten by Black's bishop as if by Pac-Man. If Black takes the pawn with their bishop without careful thought, then the trap may succeed.

Six professional shogi players – Yoshiharu Habu, Yasumitsu Satō, Toshiyuki Moriuchi, Kōji Tanigawa, Akira Watanabe, Takeshi Fujii – agreed that the opening puts White at a disadvantage.[1]

Development

Main line
Pac-Man
☖ pieces in hand: –
987654321 
香桂銀金王金銀桂香1
     飛 角 2
歩歩歩歩馬 歩歩3
      歩  4
         5
  歩      6
歩歩 歩歩歩歩歩歩7
       飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: 歩歩

Double Pac-Man

Rook promotion line
Pac-Man
☖ pieces in hand: –
987654321 
香桂銀金王金銀桂香1
      角 2
歩歩歩歩馬歩歩歩3
        4
        5
  歩     6
歩歩 歩歩龍歩歩歩7
       飛 8
香桂銀金玉金銀桂香9
☗ pieces in hand: 歩歩
gollark: It's not perfectly fine to stalk people just because you also don't reveal it to them.
gollark: I'm not saying "stop this because you're a triangular idiot", more "your excuse is invalid you triangular idiot".
gollark: No, but that's not the point?
gollark: In fact, triangular isn't even accurate... more like octachoronic.
gollark: Ethics aren't waived because you're a triangular idiot with no respect for other people's privacy.

References
  1. 将棋世界, 2007 June, pp. 84–85.

Bibliography
  • 湯川 [Yukawa], 博士 [Hiroshi] (1989). 奇襲大全. 毎日コミュニケーションズ. ISBN 978-4-8399-0177-6.CS1 maint: ref=harv (link)
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