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标题: Mona Lisa Code Breaker [打印本页]

作者: 野子 时间: 2010-11-8 15:50:06 标题: Mona Lisa Code Breaker

Mona Lisa Code Breaker，全新盒装不好找，luca让给我了，感谢，好东西大家互相谦让，非常和谐，呵呵。
详细介绍洞洞的帖子里已经都有了，这里就发一下英文的介绍吧：
The (Mona Lisa) Code Breaker is a clever 3×3 variant on the sliding piece puzzle like the Fifteen puzzle. The top middle tile slides up into a recess, leaving the remaining 8 tiles free to slide about in a 3×3 square. On the back of the puzzle is a big knob which can be pushed in and rotated, and this lift out and rotates the tiles at the four corners of the square. In this way you can rotate 4 (or 3) tiles at a time. The mechanism for turning corners holds the 4 (or 3) tiles in a horizontal or vertical groove. Initially those four grooves are horizontal, which means that the corner tiles can only slide horizontally. Before you can slide them vertically, you need to give them all a quarter turn.
When the puzzle was first released it had a picture on it of the face of the Mona Lisa, in order to take advantage of the popularity of the Da Vinci Code. There was also a version with numbers like a Sudoku. I was asked by Eureka Puzzles for a new design, and the arrangement of rings I came up with has been adopted for the current version of the puzzle, called the Twisting Rings Puzzle.
This puzzle was invented by Dov Nesis, who also invented Virus, which can be seen on the Fifteen puzzle page.

The number of positions

et's ignore the top middle piece, since it does not really take part in the puzzle. The other 8 movable pieces and the blank space have 9! permutations, but as with most sliding piece puzzles only half of these can actually be achieved. They can therefore be mixed in 9!/2 ways. Each of the 8 pieces can also be oriented independently of one another, in 4 ways. This gives a total of 48·9!/2 = 23,781,703,680.
Note that if the direction of the grooves is also be considered part of the puzzle's position, then this number should be doubled. It can, however, be solved with the grooves in either direction.

Solution:It is important to realise that if you move a tile into a corner spot, and then slide it out in the other direction (not back the way it came), then the tile must have been twisted a quarter turn. This means that if you want move a tile about without having to twist it, you must not let it go through a corner (or you have to do it an even number of times).
In the description below I will assume you have basic familiarity with sliding piece puzzles such as the Fifteen puzzle, in that you should be able to bring any tile to any location. I will also assume that if you need to move a tile to or from a corner in the process, that you will twist the corners as necessary to put the grooves in the right direction for the tiles to move in the direction you want.
Phase 1: Solve the bottom row.

Find the tile that goes in the bottom left corner.
If it is not oriented correctly, bring it to any corner, and twist it to its correct orientation.
Slide the tile to the bottom middle position without twisting it, i.e. without it entering any corners.
Move the tile leftwards into the corner. From now on, that tile will not be moved again except that it will often be temporarily twisted.
Find the tile that goes in the bottom right corner.
If it is not oriented correctly, bring it to any corner (not the bottom left of course), and twist it to its correct orientation.
Slide the tile to the bottom middle position without twisting it, i.e. without it entering any corners. As you do so, also make sure that the tile belonging at the bottom middle does not lie in the bottom right corner.
Find the tile that belongs at the middle of the bottom row.
If it is not oriented correctly, bring it to one of the top corners, and twist it to its correct orientation.
Slide the tile to the centre position without twisting it, i.e. without it entering any corners.
Without disturbing the three tiles, bring the space around to the bottom right corner.
Orient the bottom left tile, and then slide the other two tiles into place.

!B59l49!Bmk~$(KGrHqIOKnEEy0W-ZP43BMvqvfoeJg~~_12.jpg

[ 本帖最后由野子于 2011-5-29 22:04 编辑 ]

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作者: godong 时间: 2010-11-8 16:24:36

野子，你拍的太梦幻了。

。

作者: hzchensenlin 时间: 2010-11-8 16:24:40

楼主把标题换成中文，应该更多人进来看，大部分英文标题我都飘过了

作者: 野子 时间: 2010-11-8 16:34:52

回楼上，蒙娜丽莎必须梦幻啊哈哈
没多少人喜欢收藏的，就算中文也没人愿意看
直接发给懂行的人看就行了

作者: 42752277 时间: 2010-11-8 17:04:49

蒙娜丽莎……

作者: kattokid 时间: 2010-11-8 17:31:07

原帖由 chunye810516 于 2010-11-8 16:34 发表
回楼上，蒙娜丽莎必须梦幻啊哈哈
没多少人喜欢收藏的，就算中文也没人愿意看
直接发给懂行的人看就行了

上次我看到的是不是这个，后面有把手可以旋转的？可能是我记错了

作者: lunny 时间: 2010-11-8 22:06:44

哦哦，上图了啊，你这个到的挺快啊～
话说那老外寄东西咋就那么慢……

作者: kimimcfly 时间: 2010-11-10 11:06:43

图片微距对得不够准。。。再清晰点。。。微笑！

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