[原创]十三阶魔方及其结构

大烟头

<table cellspacing="0" cellpadding="0" width="100%" border="0"><tbody><tr><td class="postbody" valign="top">Now if you add that up: <br/><br/>8+24+12+24+24+6 = 98 <br/><br/>And: <br/><br/>5x5x5 = 125 <br/><br/>The difference is 27 or 3x3x3. <br/><br/>So place a working 3x3x3 made of 27 identical shapes inside this 5x5x5 shell. I'll leave it as an excersise to work out the exact shape of those 27 identical pieces. <img alt="Smile" src="http://twistypuzzles.com/forum/images/smiles/icon_smile.gif" border="0"/>
                                        <br/><br/>Think of it as a 3x3x3 that wears its innards on the outside. This technique can be used to make a functional 7x7x7 out of 343 identical pieces. To my knowledge its the only way to make a working 7x7x7 out of identical sized cubies where the corner cubies don't fall off or the shape of the cube is deformed in some way. You just need a clear 9x9x9 case or shell to put it in. You can start with something like this and do what I did above if you wanted to. <br/><br/><img title="Image" alt="Image" src="http://www.wwwmwww.com/Puzzle/7x7x7.png" border="0"/>
                                        <br/><br/>Enjoy, <br/>Carl</td></tr><tr><td class="gensmall" valign="bottom" height="40"><span class="postbody"></span><span class="postdetails"><br/><br/>Last edited by wwwmwww on Tue Jan 30, 2007 10:24 am; edited 1 time in total</span></td></tr></tbody></table><p><hr/>老外这九阶的棱块的面就变成长方形的了，如果按魔友纸魔方所设计的思路，角块与棱块就可做到与心块的面一样大了，这样旋转45度时角块是由两个面固定，应该是不会丢下来的。</p><p></p>

yingmu

[em02]

纸做的魔方

缺点是交界处会有凹凸槽，露在外面

极度郁闷

图片看不到……

libiamo

估计拧好比制造好要的时间都长

一叶知秋

[em01][em17]

foxmirra

<p>太有才了</p>

wendellxx

我要N年后才能看明白