还猪哥哥 发表于 2004-11-28 11:53:07

本周最少步数题目

<P>R' B U2 (F' D2 R)*4 L' D2 (F R U2)*4 D' F' R2</P>
<P>请小丘用他的方法讲解一下还原过程中的思路。</P>

yinjiaqiu 发表于 2004-11-28 12:33:51

<P>十字</P>

<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2 1">
<PARAM name="steps3" value="L3F3R1D1F1L3">
</APPLET>  L' F' R D F L'</p>
<P>第一对</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3 1">
<PARAM name="steps3" value="U1L3U3L1U2L1U3L3">
</APPLET>  U L' U' L U2 L U' L'</p>
<P>第二对</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3U1L3U3L1U2L1U3L3 1">
<PARAM name="steps3" value="U1F1U3F3U3L3U1L1">
</APPLET>  U F U' F' U' L' U L</p>
<P>第三对</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3U1L3U3L1U2L1U3L3U1F1U3F3U3L3U1L 1">
<PARAM name="steps3" value="U3F3U2F2R3F3R1">
</APPLET>  U' F' U2 F2 R' F' R</p>
<P>第四对</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3U1L3U3L1U2L1U3L3U1F1U3F3U3L3U1L1U3F3U2F2R3F3R 1">
<PARAM name="steps3" value="B1U1B3U1B1U1B3">
</APPLET>  B U B' U B U B'</p>
<P>OLL</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3U1L3U3L1U2L1U3L3U1F1U3F3U3L3U1L1U3F3U2F2R3F3R1B1U1B3U1B1U1B3 1">
<PARAM name="steps3" value="B3U2B1U1B3U1B1">
</APPLET>  B' U2 B U B' U B</p>
<P>PLL</P>
<p><APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="444444444222222222333333333555555555000000000111111111">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2L3F3R1D1F1L3U1L3U3L1U2L1U3L3U1F1U3F3U3L3U1L1U3F3U2F2R3F3R1B1U1B3U1B1U1B3B3U2B1U1B3U1B1 1">
<PARAM name="steps3" value="U1R3U1R3U3B3D1B3D3B2R3B3R1B1R1">
</APPLET>  U R' U R' U' B' D B' D' B2 R' B' R B R </p>

yinjiaqiu 发表于 2004-11-28 12:39:44

<P>6+8+8+7+7+7+15=58</P><P>平时都这么多上下</P>

大烟头 发表于 2004-11-28 13:25:55

58/20妙，约一秒转3下，

还猪哥哥 发表于 2004-11-28 15:08:50

小丘你的58步是实战过程的记录，更有实际意义。希望你能就你的还原过程，讲一讲你在十字、四角、OLL、PLL七个步骤前是如何观察的，如何作出决定的。在进行当前步骤的过程中时候你是通过什么看出下一步的。

cube_master 发表于 2004-11-28 23:46:21

<P>用我的方法、与用我习惯起始的颜色，不刻意加优化试试。</P>
<P>先按要求打乱魔方：</P>
<P>R' B U2 F' D2 R F' D2 R F' D2 R F' D2 R L' D2 F R U2 F R U2 F R U2 F R U2 D' F' R2</P>
<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="000000000111111111555555555333333333444444444222222222">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2">
<PARAM name="steps3" value="">
</APPLET>
[此贴子已经被作者于2004-11-28 23:49:11编辑过]

cube_master 发表于 2004-11-28 23:54:43

<P>一、完成用红、黄、蓝、绿构成的1×1×3</P>
<P>F R' F R2 L'</P>

<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="000000000111111111555555555333333333444444444222222222">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2">
<PARAM name="steps3" value="F1R3F1R2L3">
</APPLET></p>

cube_master 发表于 2004-11-29 00:00:45

<P>二、将上一步扩展至2×2×3</P>
<P>U D L U2 D R' U B2 U B2</P>

<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="000000000111111111555555555333333333444444444222222222">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2F1R3F1R2L3">
<PARAM name="steps3" value="U1D1L1U2D1R3U1B2U1B2">
</APPLET></p>

cube_master 发表于 2004-11-29 00:15:28

<P>三、由于此时很容易看到 <FONT color=#0000ff>红白</FONT> 棱块与 <FONT color=#0000ff>红白蓝</FONT> 角块已经走到一起，所以直接采用它完成2×3×3</P>
<P>L D L' F D2 R' D' R D2 F D2 F'</P>

<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="000000000111111111555555555333333333444444444222222222">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2F1R3F1R2L3U1D1L1U2D1R3U1B2U1B2">
<PARAM name="steps3" value="L1D1L3F1D2R3D3R1D2F1D2F3">
</APPLET></p>

cube_master 发表于 2004-11-29 00:22:12

<P>四、最后一层 <FONT color=#0000ff>十字</FONT> 兼 <FONT color=#0000ff>换角</FONT></P>
<P>R' D2 R D2 R F' R' F</P>

<APPLET codebase=http://www.rubiks.cn/java code=demo.class height=145 width=125 >
<PARAM name="planes" value="3">
<PARAM name="facelets3" value="000000000111111111555555555333333333444444444222222222">
<PARAM name="moves3" value="R3B1U2F3D2R1F3D2R1F3D2R1F3D2R1L3D2F1R1U2F1R1U2F1R1U2F1R1U2D3F3R2F1R3F1R2L3U1D1L1U2D1R3U1B2U1B2L1D1L3F1D2R3D3R1D2F1D2F3">
<PARAM name="steps3" value="R3D2R1D2R1F3R3F1">
</APPLET></p>
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