WO2002007835A1 - Cubic puzzle - Google Patents

Cubic puzzle Download PDF

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Publication number
WO2002007835A1
WO2002007835A1 PCT/KR2001/001225 KR0101225W WO0207835A1 WO 2002007835 A1 WO2002007835 A1 WO 2002007835A1 KR 0101225 W KR0101225 W KR 0101225W WO 0207835 A1 WO0207835 A1 WO 0207835A1
Authority
WO
WIPO (PCT)
Prior art keywords
slice
axis
slices
cubic
sectors
Prior art date
Application number
PCT/KR2001/001225
Other languages
French (fr)
Inventor
Man Ho Song
Original Assignee
Man Ho Song
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Man Ho Song filed Critical Man Ho Song
Publication of WO2002007835A1 publication Critical patent/WO2002007835A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/06—Patience; Other games for self-amusement
    • A63F9/12—Three-dimensional jig-saw puzzles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/06—Patience; Other games for self-amusement
    • A63F9/12—Three-dimensional jig-saw puzzles
    • A63F9/1288—Sculpture puzzles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F9/00—Games not otherwise provided for
    • A63F9/06—Patience; Other games for self-amusement
    • A63F9/12—Three-dimensional jig-saw puzzles
    • A63F9/1288—Sculpture puzzles
    • A63F2009/1292—Sculpture puzzles formed by stackable elements

Definitions

  • This invention is for a cubic puzzle to develop one's intellectual faculty.
  • cubic puzzles A variety of cubic puzzles are announced now, but their cubic structures are so simple that they are relatively difficult to attract or satisfy one's intellectual interests. Some cubic puzzles are to reassemble simply small pieces into a complete unit in a two dimensional plane and others are to pile up small cubic blocks.
  • This invention is to solve such weak points of the conventional cubic puzzles and provide highly advanced cubic puzzles to fully satisfy customer's intellectual curiosity.
  • a complete body (the original cubic body) is formed at the first and then it is laterally cut into a lot of slices.
  • a Agrippa's head can be subdivided into such slices. And then, these slices can be reassembled or restored into a complete Agrippa's head by stacking them up through holes already made on the each slice along an axis which stands up vertically on a sustaining board.
  • a hole(40) is made on each slice(30a) to be aligned with the long z-axis(35a) which stands up at a sustaining board(45).
  • a short z-axis(35b) and a dented hole (42) can be used, instead of holes(40) and a long z- axis(35a) on a sustaining board(45) as shown in fig.14 and 15.
  • a short z-axis is formed at bottom side of each slice and a dented hole at the top side of each slice.
  • the fig.3 show cubic structures with two long z-axes(35a).
  • the fig.4 show cubic structures with three long z-axes(35a). And the fig.5 show cubic structures with four long z-axes(35a).
  • each slice(30a) is segmented into smaller sectors which have their own z-axis on the center of each sector as shown in fig.3, 4 and 5.
  • Fig. 1 An example of a cubic structure with a long z-axis in this invention.
  • Fig. 2 A cubic structure which is composed of a lot of slices and a hole on each layer.
  • Fig. 3 A cubic structure with two long z-axes.
  • Fig. 4 A cubic structure with three long z-axes.
  • Fig. 5 A cubic structure with four long z-axes
  • Fig. 6 A cubic structure with a form of rectangular box, on the surface of which drawings or character letters can be printed to ease reassembling of this cubic structure.
  • Fig. 7 A cubic structure with a form of cylinder on the surface of which drawings or character letters can be printed to ease reassembling of this cubic structure.
  • Fig. 8 A rectangular box type of cubic structure with two long z-axes
  • Fig. 9 A cylinder type of cubic structure with two long z-axes
  • Fig.10 A polyhedron of cubic structure with three z-axes
  • Fig.11 A rectangular box type of cubic structure with four long z-axes
  • Fig.12 A cylinder type of cubic structure with three long z-axes
  • Fig.13 A cylinder type of cubic structure with four long z-axes
  • Fig.14 A slice with a short z-axis on its bottom side
  • Fig.15 A slice with a dented hole on its top side
  • 35a a long z-axis
  • Case 1 A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit.
  • a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice.
  • These short z-axis and dented hole are aligned with the z-axis line.
  • One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
  • Case 2 A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit.
  • each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector.
  • These short z-axis and dented hole are aligned with the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
  • Case 3 A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector.
  • These short z-axis and dented hole are aligned with the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes.
  • Case 4 A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice. These short z-axis and dented hole are aligned with the z-axis line.
  • One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
  • Case 5 A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed.
  • each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector.
  • These short z-axis and dented hole are aligned with the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
  • Case 6 A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with- the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
  • Case 7 A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice. These short z-axis and dented hole are aligned with the z-axis line.
  • One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
  • Case 8 A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit on the surface of which drawings, text or characters are printed.
  • each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector.
  • These short z-axis and dented hole are aligned with the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
  • Case 9 A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with the z-axis line.
  • One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Toys (AREA)

Abstract

This invention is for a cubic puzzle structure for developing an intellectual faculty of infants or children through assembling puzzles or games in a three dimensional space. A cubic body is laterally cut into a lot of slices(30a) and each hole(40) is formed at the center of each slice to be aligned with a long z-axis(35a)on the sustaining board(45). These slices can be stacked one by one through the hole and z-axis on the sustaining board, finally reaching the original complete unit. In addition, drawings or character letters are printed on the surface of cubic body or slices to enhance one's imagination or help assembling. In addition, the number of z-axis can be easily extended into more than one z-axis to add more interests or increase level of difficulty, where each slice is segmented again into smaller sectors which forms a separate unit of puzzle on every level of slice.

Description

Cubic Puzzle
Technical Field
This invention is for a cubic puzzle to develop one's intellectual faculty.
Background Art
A variety of cubic puzzles are announced now, but their cubic structures are so simple that they are relatively difficult to attract or satisfy one's intellectual interests. Some cubic puzzles are to reassemble simply small pieces into a complete unit in a two dimensional plane and others are to pile up small cubic blocks.
These types of cubic puzzles are not so effective to properly develop infant's intellectual faculty since their assembly structure is basically simple and monotonous, and their finally assembled units are not complex enough to stimulate one's intellectual curiosity or spatial perception.
Disclosure of Invention
This invention is to solve such weak points of the conventional cubic puzzles and provide highly advanced cubic puzzles to fully satisfy customer's intellectual curiosity.
In this invention, a complete body (the original cubic body) is formed at the first and then it is laterally cut into a lot of slices. For an example, a Agrippa's head can be subdivided into such slices. And then, these slices can be reassembled or restored into a complete Agrippa's head by stacking them up through holes already made on the each slice along an axis which stands up vertically on a sustaining board. These procedures in assemble and dissemble not only require one's spatial perception and analytical capability but also help to develop one's intellectual faculty.
This invention is described in detail through the fig.l, 2, 3, 4 and 5. As shown in fig.l, a complete unit (10a) is divided into a lot of slices(30a).
In fig.2, a hole(40) is made on each slice(30a) to be aligned with the long z-axis(35a) which stands up at a sustaining board(45).
These slices(30a) can be reconstructed into an original complete unit by stacking them one by one by passing them through the holes on them along the long z-axis(35a).
As another method of connecting slices together, a short z-axis(35b) and a dented hole (42) can be used, instead of holes(40) and a long z- axis(35a) on a sustaining board(45) as shown in fig.14 and 15.
In this connection method, a short z-axis is formed at bottom side of each slice and a dented hole at the top side of each slice. These slices can be tightly connected together by simply stacking and then pressing them.
As other forms of cubic structures in this invention, they can have more than one long z-axis(35a), as shown in fig.3, 4 and 5.
The fig.3 show cubic structures with two long z-axes(35a).
And the fig.4 show cubic structures with three long z-axes(35a). And the fig.5 show cubic structures with four long z-axes(35a).
In this structure with more than one long z-axis(35a), each slice(30a) is segmented into smaller sectors which have their own z-axis on the center of each sector as shown in fig.3, 4 and 5.
Here, the most important is that sectors in a given slice form a sub- puzzle as a separate unit.
In other word, customers will have to try to assemble those sectors into a separate unit on every level of slice.
This complex and more advanced assembling structure will attract more intellectual interest from customers.
In addition, drawings, text or character letters can be printed on each plane(55, 60, 65, 70) or curved surface(50) which is composed of subdivided segments on each layer as shown in fig.6, 7, 8, 9, 10, 11, 12 and 13.
Similarly, such drawings and character letters can be also printed on surface of cubic complete unit(10a, 10b, 10c).
These drawings or characters printed on the surfaces of slice or cubic body can help ones build up more easily cubic pieces into a complete unit or attract one' s intellectual curiosity.
A cubic structure in this invention has the following advantages :
* Effective development of intellectual faculty in a three- dimensional space
* Logical and systematic thought by various simulations and modeling processes through a lot of slices and segmented pieces
* Increasing one's observation and concentration on objects * Growing one's learning capability through friendly and natural plays or puzzle games
* Customization of difficulties of the cubic structure to one's ages or intellectual levels
Brief Description of Drawings
Fig. 1 : An example of a cubic structure with a long z-axis in this invention. Fig. 2 : A cubic structure which is composed of a lot of slices and a hole on each layer.
Fig. 3 : A cubic structure with two long z-axes. Fig. 4 : A cubic structure with three long z-axes. Fig. 5 : A cubic structure with four long z-axes
Fig. 6 : A cubic structure with a form of rectangular box, on the surface of which drawings or character letters can be printed to ease reassembling of this cubic structure.
Fig. 7 : A cubic structure with a form of cylinder on the surface of which drawings or character letters can be printed to ease reassembling of this cubic structure. Fig. 8 : A rectangular box type of cubic structure with two long z-axes Fig. 9 : A cylinder type of cubic structure with two long z-axes Fig.10 : A polyhedron of cubic structure with three z-axes Fig.11 : A rectangular box type of cubic structure with four long z-axes Fig.12 : A cylinder type of cubic structure with three long z-axes Fig.13 : A cylinder type of cubic structure with four long z-axes Fig.14 : A slice with a short z-axis on its bottom side Fig.15 : A slice with a dented hole on its top side
More descriptions about the figures
10a, 10b, 10c : a complete unit
15 : a cubic body 20 : a rectangular box
25 : a cylinder
30a, 30b, 30c : one of segmented slices
35a : a long z-axis
35b : a short z-axis 40 : a hole
42 : a dented hole
45 : a sustaining board
50 : a curved surface
55 : a front surface 60 : a rear surface
65 : a left surface
70 : a right surface
Best Mode for Carrying Out the Invention
Case 1 : A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit.
And then, a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice. These short z-axis and dented hole are aligned with the z-axis line. One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
Case 2 : A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit.
And then, each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
Case 3 : A cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector.
These short z-axis and dented hole are aligned with the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes.
These sectors will have to be properly assembled to form a complete slice at every level of slice.
Case 4 : A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice. These short z-axis and dented hole are aligned with the z-axis line. One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
Case 5 : A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed.
And then, each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
Case 6 : A polyhedron type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with- the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
Case 7: A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, a short z-axis(35b) is formed at the center of bottom side of each slice and a dented hole(42) is formed at the top side of each slice. These short z-axis and dented hole are aligned with the z-axis line. One slice can be stacked tightly on the other slice by pushing the short z-axis on one slice into the dented hole in the other slice to form a complete unit along the z-axis.
Case 8 : A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit on the surface of which drawings, text or characters are printed.
Aid then, each slice is segmented into more than one small pieces of sectors in y-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
Case 9 : A cylinder type of cubic body is laterally cut into a lot of slices once after the cubic body has a form of complete unit, on the surface of which drawings, text or characters are printed. And then, each slice is segmented into more than two small pieces of sectors in y-direction and x-direction, where a short z-axis(35b) is formed at the center of bottom side of each sector and a dented hole(42) is formed at the top side of each sector. These short z-axis and dented hole are aligned with the z-axis line. One sector can be stacked tightly on the other sector at the every slice level by pushing the short z-axis on one sector into the dented hole in the other sector to form a complete unit along one of the z-axes. These sectors will have to be properly assembled to form a complete slice at every level of slice.
Industrial Applicability
Teaching materials or tools for infants and children, a decoration and a material for a sales promotion

Claims

Claims
1. A cubic puzzle where the entire cubic body is laterally cut into a lot of slices and a short z-axis(35b) is formed on the bottom side of the slice while a dented hole(42) is formed on the other top side of the slice. These slices can be assembled one by one to be restored into a complete unit (the original cubic body) by inserting the short z-axis of one slice into the dented hole of the other slice.
2. The method of claim 1, wherein each slice is segmented again into more than one small sectors in y-direction, where a short z-axis(35b) and a dented hole(42) are individually formed on the bottom and top side of each sector, respectively. These sectors will be assembled in y-direction to form each slice and then these slices will assembled into a complete unit in z-direction.
3. The method of claim 1, wherein each slice is segmented again into more than two small sectors in y-direction and x-direction respectively, where a short z-axis(35b) and a dented hole(42) are individually formed on the bottom and top side of each sector, respectively. These sectors will be assembled in y-direction and x-direction to form each slice and then these slices will assembled into a complete unit in z- direction.
4. A cubic puzzle where the entire cubic body is laterally cut into a lot of slices and a hole(40) is formed on the center of each. These slices can be assembled one by one to be restored into a complete unite (the original cubic body) by inserting the slices to a long z-axis(35a) standing up on a sustaining board(45) through holes on each slice.
5. The method of claim 4, wherein each slice is segmented again into more than one small sector in y-direction, where holes(40) are individually formed on the center of each sectors. These sectors will be assembled in y-direction to form each slice and then these slices will assembled into a complete unit in z-direction.
6. The method of claim 4, wherein each slice is segmented again into more than two small sectors in y-direction and x-direction, where holes(40) are individually formed on the center of each sectors. These sectors will be assembled in y-direction and x-direction to form each slice and then these slices will assembled into a complete unit in z-direction.
7. The method of claim 1 or 4, wherein the cubic body is made of a polyhedron with many surfaces on which drawings, text or characters are printed or painted to help the assembling process.
8. The method of claim 1 or 4, wherein the cubic body is made of a cylinder on which drawings, text or characters are printed or painted to help the assembling process.
PCT/KR2001/001225 2000-07-26 2001-07-18 Cubic puzzle WO2002007835A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2020000021325U KR200218723Y1 (en) 2000-07-26 2000-07-26 Solid puzzle
KR2000-21325U 2000-07-26

Publications (1)

Publication Number Publication Date
WO2002007835A1 true WO2002007835A1 (en) 2002-01-31

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WO (1) WO2002007835A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437668A (en) * 1982-06-04 1984-03-20 Johnson & Johnson Baby Products Company Puzzle post toy
US4518165A (en) * 1983-05-11 1985-05-21 Shmueli Shmuel S Three dimensional combination assembly game
JPH07227476A (en) * 1994-02-18 1995-08-29 Kyoiku Design Kenkyusho:Kk Cubic puzzle
JPH1043426A (en) * 1996-08-07 1998-02-17 Hirobumi Yamamoto Education training toy
JPH11267351A (en) * 1998-03-20 1999-10-05 Kayoko Kasuya Piece-built-in puzzle with intermediate plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437668A (en) * 1982-06-04 1984-03-20 Johnson & Johnson Baby Products Company Puzzle post toy
US4518165A (en) * 1983-05-11 1985-05-21 Shmueli Shmuel S Three dimensional combination assembly game
JPH07227476A (en) * 1994-02-18 1995-08-29 Kyoiku Design Kenkyusho:Kk Cubic puzzle
JPH1043426A (en) * 1996-08-07 1998-02-17 Hirobumi Yamamoto Education training toy
JPH11267351A (en) * 1998-03-20 1999-10-05 Kayoko Kasuya Piece-built-in puzzle with intermediate plate

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