PHP PHP数独求解器

Posted 2021-05-15

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#!/usr/bin/php
&lt;?php

    for ($x=1;$x &lt; 10; $x++) {
        for ($y=1;$y &lt; 10; $y++) {
            for ($z=1;$z &lt; 10; $z++) {
                if (($x + $y + $z == 15) &amp;&amp; (($x != $y) &amp;&amp; ($x != $z) &amp;&amp; ($y != $z))) {

        for ($a=1;$a &lt; 10; $a++)
        for ($b=1;$b &lt; 10; $b++)
        for ($c=1;$c &lt; 10; $c++)
                if (($a + $b + $c == 15) &amp;&amp; (($a != $b) &amp;&amp; ($a != $c) &amp;&amp; ($b != $c)))    
        for ($i=1;$i &lt; 10; $i++)
        for ($o=1;$o &lt; 10; $o++)
        for ($p=1;$p &lt; 10; $p++)
                if (($i + $o + $p == 15) &amp;&amp; (($i != $o) &amp;&amp; ($i != $p) &amp;&amp; ($o != $p)))    
        if (($x + $a + $i == 15) &amp;&amp; (($x != $a) &amp;&amp; ($x != $i) &amp;&amp; ($a != $i))) 
        if (($y + $b + $o == 15) &amp;&amp; (($y != $b) &amp;&amp; ($y != $o) &amp;&amp; ($b != $o))) 
        if (($z + $c + $p == 15) &amp;&amp; (($z != $c) &amp;&amp; ($z != $p) &amp;&amp; ($c != $p)))
        if (($x != $b) &amp;&amp; ($x != $c) &amp;&amp; ($x != $o) &amp;&amp; ($x != $p))
        if (($y != $a) &amp;&amp; ($y != $i) &amp;&amp; ($y != $c) &amp;&amp; ($y != $p))
        if (($z != $b) &amp;&amp; ($z != $a) &amp;&amp; ($z != $o) &amp;&amp; ($z != $i)) {
            echo &quot;$x $y $z\n&quot;;
            echo &quot;$a $b $c\n&quot;;
            echo &quot;$i $o $p\n\n&quot;;
            flush();
        //return;
        }
                }
            }
        }
    }
    
?&gt;

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回溯数独求解器不起作用

为啥这个数独求解器返回相同的板而不解决任何问题？