This file is indexed.

/usr/share/doc/pgn-extract/index.html is in pgn-extract 17.55-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
<!DOCTYPE HTML>
<html>
<head>
	<title>pgn-extract: Portable Game Notation (PGN) Manipulator for Chess Games</title>
	<link rev="made" href="mailto:d.j.barnes @ kent.ac.uk">
	<meta name="Author" content="David J. Barnes">
	<meta name="Description"
	      CONTENT="FTP Directory with source of program to manipulate
	      chess games recorded in Portable Game Notation (PGN)
	      format">
	<meta name="Keywords" content="Chess PGN Portable Game Notation
			Database
			pgn-extract">
        <link href="style.css" rel="stylesheet" type="text/css" media="all">
</head>
<body>
<div id="body">

  <div id="banner-wrapper">
    <div id="banner">
<h1 align="center">pgn-extract:<br />A Portable Game Notation (PGN) Manipulator for Chess Games<br />
Version 17-51 by <a href="https://www.cs.kent.ac.uk/~djb/">David J. Barnes</a>
(<a href="https://twitter.com/kentdjb">@kentdjb</a>)<br />
<a href="pgn-extract.xml">
<img alt="RSS feed image" src="feed.png" width="25" height="25"></a>
</h1>
    </div>
  </div>

  <div id="page-wrapper">
    <div id="page">
<h2>Introduction</h2>
<p>This is the home page for
the <em>pgn-extract</em> program,
which is a <em>command-line</em> program for searching, manipulating and formatting
chess games recorded in the Portable Game Notation (PGN) or something close. It
is capable of handling files containing millions of games. It also recognises Chess960
encodings.
<p>A <a href="https://www.cs.kent.ac.uk/people/staff/djb/pgn-extract/help.html">full
description of pgn-extract's functionality</a> is available and included
with the sources.

<p>Here you can find the C source code and win32 binary for the current
version.
pgn-extract compiles and runs under Windows, Linux and Mac OS X.
This program is made available under the terms of the
<a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/COPYING">GNU
General Public License (Version 1).</a>

<h2>Overview</h2>
<p>The program is designed to make it easy to extract and format selected games from a
PGN format data file based on a wide variety of criteria.
The criteria include:
<ul>
<li><p>textual move sequences;</p></li>
<li><p>the position reached after a sequence of moves;</p></li>
<li><p>information in the tag fields;</p></li>
<li><p>fuzzy board position;</p></li>
<li><p>and material balance in the ending.</p></li>
</ul>
<p>Over the on-going 20+ year course of its development, it has also added
lots of features for controlling what is output (e.g., different
algebraic formats, EPD, no move numbers, restricting game length, etc.)

<p>The program includes a semantic analyser which will
report errors in game scores and it is also able to detect duplicate
games found in its input files.

<p>The range of input move formats accepted is fairly wide and includes
recognition of lower-case piece letters for English and upper-case
piece letters for Dutch and German.  The output is normally in English Standard
Algebraic Notation (SAN), but this can be varied.

<p>Extracted games may be written out either including or excluding
comments, NAGs, variations, move numbers, tags and/or results.
Games may be given ECO classifications
derived from the accompanying file eco.pgn, or a customised version
provided by the user.

<p>The program is designed to be relatively memory-friendly, so it
does not retain a game's moves in memory once it has been processed.
This also makes it suitable for bulk processing very large collections of games
- it can efficiently process files containing several millions of games.

<p>Use the <em>--help</em> argument to the program to
get the full lists of arguments.

<h2>New in recent versions</h2>
<p>These are the main changes in the most recent versions:
<ul>
    <li><p>Added --nobadresults to suppress games with inconsistent result indications.
    <li><p>Added --allownullmoves to accept null moves in the main line.
    <li><p>Added -Tf for command-line FEN pattern matching.
    <li><p>Added --plycount to output a PlyCount tag.
    <li><p>Extended --markmatches to output a FEN encoding at the match position.
    <li><p>Better support for Chess960 encoding of castling.
    <li><p>License updated to version 3 of the GPL.
</ul>

<h2>Available Files</h2>
<p>You can take a copy of the full source and
documentation as either
<a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.tgz">pgn-extract.tgz</a> 
or
<a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.zip">pgn-extract.zip</a>.
Alternatively, <a
href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.exe">a win32
binary</a> is available.
</p>
    <table>
    <tr>
    <td align="center"><b>Name</b></td>
    <td align="center"><b>Description</b></td>
    <td align="center"><b>Size</b></td>
    <td align="center"><b>Date</b></td>
    </tr>

    <tr valign="top">
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.tgz">pgn-extract.tgz</a><br>
    <td>GZipped tar file
    of the complete source of the latest version of the program.<br>
    Includes <a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/help.html">usage documentation</a>,
    Makefile for compilation and
    <a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/eco.pgn">eco.pgn</a> file for ECO classification.</td>
    <td align="right">380K bytes &nbsp;</td><td>23 July 2017</td>
    </tr>

    <tr valign="top">
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.zip">pgn-extract.zip</a></td>
    <td>Zipped file of the complete source of the latest version of the program.<br>
    Includes <a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/help.html">usage documentation</a>, Makefile for compilation and
    <a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/eco.pgn">eco.pgn</a> file for ECO classification.</td>
    <td align="right">530K bytes &nbsp;</td><td>23 July 2017</td>
    </tr>

    <tr>
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/pgn-extract.exe">pgn-extract.exe</a></td>
    <td>win32 binary of the latest version of the program.</td>
    <td align="right">660K bytes &nbsp;</td><td>23 July 2017</td>
    </tr>

    <tr>
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/eco.zip">eco.zip</a></td>
    <td>Zipped version of <a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/eco.pgn">eco.pgn</a>.</td>
    <td align="right">32K bytes &nbsp;</td><td>May 24 2013</td>
    </tr>

    <tr valign="top">
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/eco.pgn">eco.pgn</a></td>
    <td>File of openings with PGN classification.<br>
	This file is already included in the source archives.
    </td>
    <td align="right">254K bytes &nbsp;</td><td>May 24 2013</td>
    </tr>

    <tr>
    <td><a href="ftp://ftp.cs.kent.ac.uk/pub/djb/pgn-extract/COPYING">COPYING</a></td>
    <td>GNU General Public License (version 3).</td>
    <td align="right">35K bytes &nbsp;</td><td>&nbsp;</td>
    </tr>
    </table>

<h2>Feedback</h2>
<p>Feedback and suggestions for further features are always welcome, although I can't always
promise to undertake significant development work.
<hr>
    </div>
  </div>

  <div id="footer">
<address>
<p>&#169; 1994-2017 David J. Barnes<br />
<a href="https://www.cs.kent.ac.uk/~djb/">My home page</a> at the University of Kent.<br />
<a href="mailto:d.j.barnes @ kent.ac.uk">d.j.barnes @ kent.ac.uk</a><br />
<a href="https://twitter.com/kentdjb">@kentdjb</a><br />
Last updated: 23rd July 2017: version 17-51 released.<br />
</p>
</address>
  </div>
</div>
  </body>
</html>