Thanks for updating robots.txt 
# Be kind. Wait between fetches longer than each fetch takes.
User-agent: *
Disallow: /bare/
Disallow: /mobile/
Disallow: /*?displaytype=
Disallow: /*&displaytype=
Disallow: /*?node=Super+Search
Disallow: /*&node=Super+Search
Disallow: /*?node_id=3989
Crawl-Delay: 20

[download]

But as I already said, you are forgetting the very common semicolon

Disallow: /*;displaytype=    
Disallow: /*;node_id=3989

[download]

Personally I'd simplify and skip all ; & ?

# Be kind. Wait between fetches longer than each fetch takes.
User-agent: *
Disallow: /bare/
Disallow: /mobile/
Disallow: /*displaytype=
Disallow: /*node=Super+Search
Disallow: /*node_id=3989
Crawl-Delay: 20

[download]

The only problem I see are IDs starting with 3989 etc (e.g. 39895)

So probably better:

Disallow: /*node=Super+Search$
Disallow: /*node_id=3989$
Disallow: /*node=Super+Search;
Disallow: /*node_id=3989;
Disallow: /*node=Super+Search&
Disallow: /*node_id=3989&

[download]

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

In reply to Re^12: Super search use DuckDuckGo link broken (excluding special pages and noise) by LanX
in thread Super search use DuckDuckGo link broken by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.