最少移动步数
<P>本周最少移动步数的题目：</P><P>U2 (R' L B' D2)*3 F2 B' (D U2 L' F)*3 D2</P>
<P>用你的还原方法求最少还原步骤。详情请参阅：</P>
<P><a href="http://www.necrophagous.co.uk/cubestation/fmcresults/fmc.php" target="_blank" >http://www.necrophagous.co.uk/cubestation/fmcresults/fmc.php</A></P> <P>先贴拿起魔方做成题目的图案后，我第一次尝试还原时的实际步骤，共45－1＝44步</P><P>(D' F' B D' U R D B U2 B' D')
(U' F2 U R' F R U' F' U' F R' F R F2)
(B L U L' U' L U L' U' B')
(B2 D B D' B R2 F' U F R2)</P> <P>38步
(D' F' B D' U R D B U2 B' D')
(U' F2 U R' F R U' F' U' F R' F R F2)
(F2 L F L' U2 R' U2 R U F2 R' F' U R U')</P><P>25步
D' F' B D' U R D B U2 B' D'
U' F2 L' U B' U B U R U2 R' U' L U2</P><P>17步
R' B2 D' R2 D' L2 B' D' U F' L' R B2 L B L2 R2</P><P>40步
D' F' B D' U F R D R D' F R U R' U2 R U' R' U L' U L U' F U F'
R2 F R F' U2 B' U2 B U R2 B' R' U B
</P> <P><b><FONT color=#000066>还猪哥哥</FONT></b>的成绩相当不错!</P><P>其实想学快速还原的朋友不妨多做这种练习，可能培养玩魔方时的反应能力，积累更多的经验。</P>
呵呵，我也来试试。</p>
<p>先把魔方按规定顺序打乱</p>
<p> U2 (R' L B' D2)*3 F2 B' (D U2 L' F)*3 D2 </p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="aaaaaaaaabbbbbbbbbcccccccccdddddddddeeeeeeeeefffffffff">
<param name="move" value="U2B3F1L3D2B3F1L3D2B3F1L3D2R2L3D1U2F3R1D1U2F3R1D1U2F3R1D2">
</applet>
[此贴子已经被作者于2004-10-19 23:11:43编辑过]
然后按我惯用的方法还原 <font color=#ff0000>橙蓝白黄</font> 组成的 2×2×3 部份</p>
<p> R' B' D' F' B2 D2 U' F' D</p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="ffbbadceddefcbebdedbfbcfeaebbacdfdaacaaeeacdfcfadfcecb">
<param name="move" value="B3L3D3R3L2D2U3R3D1">
</applet>
二、还原以 <font color=#ff0000>蓝色</font> 为底的二层缺一角</p>
<p>F' L' B U B' U L F U2</p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="babaaceccbbbbbbfefcaeccaffdadddddcddeeeeeeafaabcffcffd">
<param name="move" value="R3F3L1U1L3U1F1R1U2">
</applet>
[此贴子已经被作者于2004-10-19 23:50:07编辑过]
三、还原以 <font color=#ff0000>蓝色</font> 为底的完整二层，并完成顶层十字</p>
<p>R' B' R2 B R B' R2 B R B U' B' U</p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="defdaabcfbbbbbbdbbaccaccaacddddddacaeeeeeeefccfeffafff">
<param name="move" value="B3L3B2L1B1L3B2L1B1L1U3L3U1">
</applet>
[此贴子已经被作者于2004-10-20 0:04:23编辑过]
四、最后一层角块调换、对色</p>
<p>F R' B' R F R' B R2</p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="aadaaacaebbbbbbbbbccccccfdaddddddcfaeeeeeedcaffeffefff">
<param name="move" value="R1B3L3B1R3B3L1B2">
</applet>
五、最后一层棱块调换。完成!</p>
<p>U2 R F' B U2 F B' R U2</p>
<applet height=145 width=125 code="lrubik.class" codebase = "http://www.mf8.com.cn/Java/3a/">
<param name="pos" value="aaaaaaaaabbbbbbbbbcccccccfcdddddddcdeeeeeeeeefffffdfff">
<param name="move" value="U2B1R3L1U2R1L3B1U2">
</applet>
<p>共用步数：</p>
<p>9+9+13+8+9=48步</p>