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	<id>http://sudopedia.sudocue.net/index.php?action=history&amp;feed=atom&amp;title=Orbit</id>
	<title>Orbit - Revision history</title>
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	<updated>2026-10-10T05:22:33Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>http://sudopedia.sudocue.net/index.php?title=Orbit&amp;diff=564&amp;oldid=prev</id>
		<title>127.0.0.1: Created page with &quot;An &#039;&#039;&#039;orbit&#039;&#039;&#039; is a group of cells that must either all contain a given or none of them can.  This term is used to describe the effects of symmetry in a Sudoku...&quot;</title>
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		<updated>2021-10-26T19:11:45Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;An &amp;#039;&amp;#039;&amp;#039;orbit&amp;#039;&amp;#039;&amp;#039; is a group of &lt;a href=&quot;/index.php?title=Cell&quot; title=&quot;Cell&quot;&gt;cells&lt;/a&gt; that must either all contain a &lt;a href=&quot;/index.php?title=Given&quot; title=&quot;Given&quot;&gt;given&lt;/a&gt; or none of them can.  This term is used to describe the effects of &lt;a href=&quot;/index.php?title=Symmetry&quot; title=&quot;Symmetry&quot;&gt;symmetry&lt;/a&gt; in a &lt;a href=&quot;/index.php?title=Sudoku&quot; title=&quot;Sudoku&quot;&gt;Sudoku&lt;/a&gt;...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;An &amp;#039;&amp;#039;&amp;#039;orbit&amp;#039;&amp;#039;&amp;#039; is a group of [[cell]]s that must either all contain a [[given]] or none of them can.&lt;br /&gt;
&lt;br /&gt;
This term is used to describe the effects of [[symmetry]] in a [[Sudoku]].&lt;br /&gt;
&lt;br /&gt;
Orbits can have a size of 1, 2, 4 or 8 for standard symmetry classes, and occasionaly 3, 6 or 9 for alternative symmetry classes. Large orbits increase the chance of redundancy in the givens.&lt;/div&gt;</summary>
		<author><name>127.0.0.1</name></author>
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