puzzles: refactor and resync with upstream

This brings puzzles up-to-date with upstream revision
2d333750272c3967cfd5cd3677572cddeaad5932, though certain changes made
by me, including cursor-only Untangle and some compilation fixes
remain. Upstream code has been moved to its separate subdirectory and
future syncs can be done by simply copying over the new sources.

Change-Id: Ia6506ca5f78c3627165ea6791d38db414ace0804

42 files changed, 0 insertions, 800 deletions

diff --git a/apps/plugins/puzzles/html/blackbox.html b/apps/plugins/puzzles/html/blackbox.html
deleted file mode 100644
index f98604f..0000000
--- a/apps/plugins/puzzles/html/blackbox.html
+++ /dev/null
@@ -1,16 +0,0 @@
-Black Box
-<p>
-Determine where the hidden balls are in the box, by observing the
-behaviour of light beams fired into the box from the sides.
-<p>
-Click in a square around the edge of the box to send a beam into the
-box. Possible results are 'H' (the beam hit a ball dead-on and
-stopped), 'R' (the beam was either reflected back the way it came or
-there was a ball just to one side of its entry point) or a number
-appearing in two squares (indicating that the beam entered one of
-those squares and emerged from the other).
-<p>
-Click in the middle of the box to place your guessed ball positions.
-When you have placed enough, a green button will appear in the top
-left; click that to indicate that you think you have the answer.
-You can also right-click to mark squares as definitely known.
diff --git a/apps/plugins/puzzles/html/bridges.html b/apps/plugins/puzzles/html/bridges.html
deleted file mode 100644
index 06ec2d4..0000000
--- a/apps/plugins/puzzles/html/bridges.html
+++ /dev/null
@@ -1,13 +0,0 @@
-Bridges
-<p>
-Draw horizontal or vertical bridges to link up all the islands.
-Bridges may be single or double; they may not cross; the islands
-must all end up connected to each other; the number in each island
-must match the number of bridges that end at that island (counting
-double bridges as two). Note that loops of bridges are permitted.
-<p>
-Click on an island and drag left, right, up or down to draw a bridge
-to the next island in that direction. Do the same again to create a
-double bridge, and again to remove the bridge if you change your
-mind. Click on an island without dragging to mark the island as
-completed once you think you have placed all its bridges.
diff --git a/apps/plugins/puzzles/html/cube.html b/apps/plugins/puzzles/html/cube.html
deleted file mode 100644
index f08e16c..0000000
--- a/apps/plugins/puzzles/html/cube.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Cube
-<p>
-Roll the cube around the grid, picking up the blue squares on its
-faces. Try to get all the blue squares on to the object at the same
-time, in as few moves as possible.
-<p>
-Use the arrow keys to roll the cube, or click the mouse where you
-want it to roll towards. After every roll, the grid square and cube
-face that you brought into contact swap their colours, so that a
-non-blue cube face can pick up a blue square, but a blue face rolled
-on to a non-blue square puts it down again.
-<p>
-When you have mastered the cube, use the Type menu to select other
-regular solids!
diff --git a/apps/plugins/puzzles/html/dominosa.html b/apps/plugins/puzzles/html/dominosa.html
deleted file mode 100644
index d2f6728..0000000
--- a/apps/plugins/puzzles/html/dominosa.html
+++ /dev/null
@@ -1,10 +0,0 @@
-Dominosa
-<p>
-Tile the rectangle with dominoes (1&times;2 rectangles) so that
-every possible domino appears exactly once (that is, every possible
-pair of numbers, including doubles).
-<p>
-Click between two adjacent numbers to place or remove a domino.
-Right-click to place a line between numbers if you think a domino
-definitely cannot go there. Dominoes light up red if two identical
-ones appear on the grid.
diff --git a/apps/plugins/puzzles/html/fifteen.html b/apps/plugins/puzzles/html/fifteen.html
deleted file mode 100644
index 53053b4..0000000
--- a/apps/plugins/puzzles/html/fifteen.html
+++ /dev/null
@@ -1,6 +0,0 @@
-Fifteen
-<p>
-Slide the tiles around the box until they appear in numerical order
-from the top left, with the hole in the bottom right corner.
-<p>
-Click on a tile to slide it towards the hole.
diff --git a/apps/plugins/puzzles/html/filling.html b/apps/plugins/puzzles/html/filling.html
deleted file mode 100644
index 70ce16d..0000000
--- a/apps/plugins/puzzles/html/filling.html
+++ /dev/null
@@ -1,12 +0,0 @@
-Filling
-<p>
-Write a number in every blank square of the grid. When the grid is
-full, every orthogonally connected group of identical numbers should
-have an area equal to that number: so 1s always appear alone, 2s in
-pairs, and so on.
-<p>
-To place a number, click the mouse in a blank square to select it,
-then type the number you want on the keyboard. You can also drag to
-select multiple squares, and then type a number to place it in all
-of them. To erase numbers, select one or more squares in the same
-way and then press Backspace.
diff --git a/apps/plugins/puzzles/html/flip.html b/apps/plugins/puzzles/html/flip.html
deleted file mode 100644
index 404aae6..0000000
--- a/apps/plugins/puzzles/html/flip.html
+++ /dev/null
@@ -1,10 +0,0 @@
-Flip
-<p>
-Try to light up all the squares in the grid by flipping combinations
-of them.
-<p>
-Click in a square to flip it and some of its neighbours. The diagram
-in each square indicates which other squares will flip.
-<p>
-Select one of the 'Random' settings from the Type menu for more
-varied puzzles.
diff --git a/apps/plugins/puzzles/html/flood.html b/apps/plugins/puzzles/html/flood.html
deleted file mode 100644
index cf09eac..0000000
--- a/apps/plugins/puzzles/html/flood.html
+++ /dev/null
@@ -1,8 +0,0 @@
-Flood
-<p>
-Try to get the whole grid to be the same colour within the given
-number of moves, by repeatedly flood-filling the top left corner in
-different colours.
-<p>
-Click in a square to flood-fill the top left corner with that square's
-colour.
diff --git a/apps/plugins/puzzles/html/galaxies.html b/apps/plugins/puzzles/html/galaxies.html
deleted file mode 100644
index 8041a95..0000000
--- a/apps/plugins/puzzles/html/galaxies.html
+++ /dev/null
@@ -1,11 +0,0 @@
-Galaxies
-<p>
-Draw lines along grid edges so as to divide the grid up into
-regions. Every region should have two-way rotational symmetry, and
-should contain exactly one dot which is in its centre.
-<p>
-Click on a grid edge to add or remove a line. Right-click on a dot
-and drag the mouse to place an arrow in a grid square pointing to
-that dot, to indicate that you think that square must belong in the
-same region as that dot. Right-drag an existing arrow to move it, or
-drop it off the edge of the grid to remove it.
diff --git a/apps/plugins/puzzles/html/group.html b/apps/plugins/puzzles/html/group.html
deleted file mode 100644
index c0f52de..0000000
--- a/apps/plugins/puzzles/html/group.html
+++ /dev/null
@@ -1,52 +0,0 @@
-unfinished:Group
-<p>
-Fill in the grid with the letters shown to the top and left of it, so
-that the full grid is a valid
-<a href="http://en.wikipedia.org/wiki/Cayley_table">Cayley table</a>
-for a
-<a href="http://en.wikipedia.org/wiki/Group_(mathematics)">group</a>.
-<p>
-If you don't already know what a group is, I don't really recommend
-trying to play this game. But if you want to try anyway, the above is
-equivalent to saying that the following conditions must be satisfied:
-<ul>
-<li>
-<strong>Latin square</strong>. Every row and column must contain
-exactly one of each letter.
-<li>
-<strong>Identity</strong>. There must be some letter <i>e</i> such
-that, for all <i>a</i>, the letter in row <i>e</i> column <i>a</i> and
-the one in row <i>a</i> column <i>e</i> are both <i>a</i>. In the
-default mode, this letter is always <i>e</i> and its row and column
-are filled in for you; by reconfiguring the game using the Type menu,
-you can select a mode in which you have to work out which letter is
-the identity.
-<li>
-<strong>Inverses</strong>. For every letter <i>a</i>, there must be
-some letter <i>b</i> (which may sometimes be the same letter
-as <i>a</i>) such that the letters in row <i>a</i> column <i>b</i> and
-in row <i>b</i> column <i>a</i> are both the identity letter (as
-defined above).
-<li>
-<strong>Associativity</strong>. For every combination of
-letters <i>a</i>, <i>b</i>, and <i>c</i>, denote the letter in
-row <i>a</i> column <i>b</i> by <i>d</i>, and the one in row <i>b</i>
-column <i>c</i> by <i>e</i>. Then the letters in row <i>d</i>
-column <i>c</i> and in row <i>a</i> column <i>e</i> must be the same.
-</ul>
-<p>
-To place a letter, click in a square to select it, then type the
-letter on the keyboard. To erase a letter, click to select a square
-and then press Backspace.
-<p>
-Right-click in a square and then type a letter to add or remove the
-number as a pencil mark, indicating letters that you think
-<em>might</em> go in that square.
-<p>
-You can rearrange the order of elements in the rows and columns by
-dragging the column or row headings back and forth. (The rows and
-columns will stay in sync with each other.) Also,
-left-clicking <em>between</em> two row or column headings will add or
-remove a thick line between those two rows and the corresponding pair
-of columns (which is useful if you're considering a subgroup and its
-cosets).
diff --git a/apps/plugins/puzzles/html/guess.html b/apps/plugins/puzzles/html/guess.html
deleted file mode 100644
index 1e4fc1e..0000000
--- a/apps/plugins/puzzles/html/guess.html
+++ /dev/null
@@ -1,12 +0,0 @@
-Guess
-<p>
-Try to guess the hidden combination of colours. You will be given
-limited information about each guess you make, enabling you to
-refine the next guess.
-<p>
-Drag from the colours on the left into the topmost unfilled row to
-make a guess; then click on the small circles to submit that guess.
-The small circles give you your feedback: black pegs indicate how
-many of the colours you guessed were the right colour in the right
-place, and white pegs indicate how many of the rest were the right
-colours but in the wrong place.
diff --git a/apps/plugins/puzzles/html/inertia.html b/apps/plugins/puzzles/html/inertia.html
deleted file mode 100644
index 20077c0..0000000
--- a/apps/plugins/puzzles/html/inertia.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Inertia
-<p>
-Slide the ball around the grid picking up the gems. Every time the
-ball moves, it will keep sliding until it either hits a wall, or
-stops on a stop square (the broken circles). Try to collect every
-gem without running into any of the mines.
-<p>
-Use the numeric keypad to slide the ball horizontally, vertically or
-diagonally. Alternatively, click on the grid to make the ball move
-towards where you clicked.
-<p>
-If you hit a mine and explode, you can select Undo from the Game
-menu and continue playing; the game will track how many times you
-died.
diff --git a/apps/plugins/puzzles/html/javapage.pl b/apps/plugins/puzzles/html/javapage.pl
deleted file mode 100755
index cd5e6a1..0000000
--- a/apps/plugins/puzzles/html/javapage.pl
+++ /dev/null
@@ -1,104 +0,0 @@
-#!/usr/bin/perl
-
-use strict;
-use warnings;
-
-open my $footerfile, "<", shift @ARGV or die "footer: open: $!\n";
-my $footer = "";
-$footer .= $_ while <$footerfile>;
-close $footerfile;
-
-for my $arg (@ARGV) {
-    $arg =~ /(.*\/)?([^\/]+)\.html$/ or die;
-    my $filename = $2;
-    open my $gamefile, "<", $arg or die "$arg: open: $!\n";
-    my $unfinished = 0;
-    my $docname = $filename;
-    chomp(my $puzzlename = <$gamefile>);
-    while ($puzzlename =~ s/^([^:=]+)(=([^:]+))?://) {
-        if ($1 eq "unfinished") {
-            $unfinished = 1;
-        } elsif ($1 eq "docname") {
-            $docname = $3;
-        } else {
-            die "$arg: unknown keyword '$1'\n";
-        }
-    }
-    my $instructions = "";
-    $instructions .= $_ while <$gamefile>;
-    close $gamefile;
-
-    open my $outpage, ">", "${filename}.html";
-
-    my $unfinishedtitlefragment = $unfinished ? "an unfinished puzzle " : "";
-    my $unfinishedheading = $unfinished ? "<h2 align=center>an unfinished puzzle</h2>\n" : "";
-    my $unfinishedpara;
-    my $links;
-    if ($unfinished) {
-        $unfinishedpara = <<EOF;
-<p>
-You have found your way to a page containing an <em>unfinished</em>
-puzzle in my collection, not linked from the <a href="../">main
-puzzles page</a>. Don't be surprised if things are hard to understand
-or don't work as you expect.
-EOF
-        $links = <<EOF;
-<p align="center">
-<a href="../">Back to main puzzles page</a> (which does not link to this)
-EOF
-    } else {
-        $unfinishedpara = "";
-        $links = <<EOF;
-<p align="center">
-<a href="../doc/${docname}.html#${docname}">Full instructions</a>
-|
-<a href="../">Back to main puzzles page</a>
-EOF
-    }
-
-    print $outpage <<EOF;
-<html>
-<head>
-<title>${puzzlename}, ${unfinishedtitlefragment}from Simon Tatham's Portable Puzzle Collection</title>
-<link rel="stylesheet" type="text/css" href="../../sitestyle.css" name="Simon Tatham's Home Page Style">
-<script type="text/javascript" src="resize-puzzle-applet.js"></script>
-</head>
-<body onLoad="initResizablePuzzleApplet();">
-<h1 align=center>${puzzlename}</h1>
-${unfinishedheading}
-<h2 align=center>from Simon Tatham's Portable Puzzle Collection</h2>
-
-${unfinishedpara}
-
-<p align="center">
-<table cellpadding="0">
-<tr>
-<td>
-<applet id="applet" archive="${filename}.jar" code="PuzzleApplet"
-        width="700" height="500">
-</applet>
-</td>
-<td>
-<div id="eresize" style="width:5px;height:500px;cursor:e-resize;"></div>
-</td>
-</tr>
-<td>
-<div id="sresize" style="width:700px;height:5px;cursor:s-resize;"></div>
-</td>
-<td>
-<div id="seresize" style="width:5px;height:5px;cursor:se-resize;"></div>
-</td>
-</tr>
-</table>
-
-${instructions}
-
-${links}
-
-${footer}
-</body>
-</html>
-EOF
-
-    close $outpage;
-}
diff --git a/apps/plugins/puzzles/html/jspage.pl b/apps/plugins/puzzles/html/jspage.pl
deleted file mode 100755
index 19868bd..0000000
--- a/apps/plugins/puzzles/html/jspage.pl
+++ /dev/null
@@ -1,120 +0,0 @@
-#!/usr/bin/perl
-
-use strict;
-use warnings;
-
-open my $footerfile, "<", shift @ARGV or die "footer: open: $!\n";
-my $footer = "";
-$footer .= $_ while <$footerfile>;
-close $footerfile;
-
-for my $arg (@ARGV) {
-    $arg =~ /(.*\/)?([^\/]+)\.html$/ or die;
-    my $filename = $2;
-    open my $gamefile, "<", $arg or die "$arg: open: $!\n";
-    my $unfinished = 0;
-    my $docname = $filename;
-    chomp(my $puzzlename = <$gamefile>);
-    while ($puzzlename =~ s/^([^:=]+)(=([^:]+))?://) {
-        if ($1 eq "unfinished") {
-            $unfinished = 1;
-        } elsif ($1 eq "docname") {
-            $docname = $3;
-        } else {
-            die "$arg: unknown keyword '$1'\n";
-        }
-    }
-    my $instructions = "";
-    $instructions .= $_ while <$gamefile>;
-    close $gamefile;
-
-    open my $outpage, ">", "${filename}.html";
-
-    my $unfinishedtitlefragment = $unfinished ? "an unfinished puzzle " : "";
-    my $unfinishedheading = $unfinished ? "<h2 align=center>an unfinished puzzle</h2>\n" : "";
-    my $unfinishedpara;
-    my $links;
-    if ($unfinished) {
-        $unfinishedpara = <<EOF;
-<p>
-You have found your way to a page containing an <em>unfinished</em>
-puzzle in my collection, not linked from the <a href="../">main
-puzzles page</a>. Don't be surprised if things are hard to understand
-or don't work as you expect.
-EOF
-        $links = <<EOF;
-<p align="center">
-<a href="../">Back to main puzzles page</a> (which does not link to this)
-EOF
-    } else {
-        $unfinishedpara = "";
-        $links = <<EOF;
-<p align="center">
-<a href="../doc/${docname}.html#${docname}">Full instructions</a>
-|
-<a href="../">Back to main puzzles page</a>
-EOF
-    }
-
-    print $outpage <<EOF;
-<!DOCTYPE html>
-<html>
-<head>
-<meta http-equiv="Content-Type" content="text/html; charset=ASCII" />
-<title>${puzzlename}, ${unfinishedtitlefragment}from Simon Tatham's Portable Puzzle Collection</title>
-<script type="text/javascript" src="${filename}.js"></script>
-</head>
-<body onLoad="initPuzzle();">
-<h1 align=center>${puzzlename}</h1>
-${unfinishedheading}
-<h2 align=center>from Simon Tatham's Portable Puzzle Collection</h2>
-
-${unfinishedpara}
-
-<hr>
-<div id="puzzle" style="display: none">
-<p align=center>
-  <input type="button" id="new" value="New game">
-  <input type="button" id="restart" value="Restart game">
-  <input type="button" id="undo" value="Undo move">
-  <input type="button" id="redo" value="Redo move">
-  <input type="button" id="solve" value="Solve game">
-  <input type="button" id="specific" value="Enter game ID">
-  <input type="button" id="random" value="Enter random seed">
-  <select id="gametype"></select>
-</p>
-<div align=center>
-  <div id="resizable" style="position:relative; left:0; top:0">
-  <canvas style="display: block" id="puzzlecanvas" width="1px" height="1px" tabindex="1">
-  </canvas>
-  <div id="statusbarholder" style="display: block">
-  </div>
-  </div>
-  <p>
-    Link to this puzzle:
-    <a id="permalink-desc">by game ID</a>
-    <a id="permalink-seed">by random seed</a>
-  </p>
-</div>
-</div>
-<div id="apology">
-Sorry, this Javascript puzzle doesn't seem to work in your web
-browser. Perhaps you have Javascript disabled, or perhaps your browser
-doesn't provide a feature that the puzzle code requires (such as
-<a href="https://developer.mozilla.org/en-US/docs/JavaScript/Typed_arrays">typed arrays</a>).
-These puzzles have been successfully run in Firefox 19, Chrome 26,
-Internet Explorer 10 and Safari 6.
-</div>
-<hr>
-
-${instructions}
-
-${links}
-
-${footer}
-</body>
-</html>
-EOF
-
-    close $outpage;
-}
diff --git a/apps/plugins/puzzles/html/keen.html b/apps/plugins/puzzles/html/keen.html
deleted file mode 100644
index bd0eb36..0000000
--- a/apps/plugins/puzzles/html/keen.html
+++ /dev/null
@@ -1,15 +0,0 @@
-Keen
-<p>
-Fill in the grid with digits from 1 to the grid size, so that every
-digit appears exactly once in each row and column, and so that all
-the arithmetic clues are satisfied (i.e. the clue number in each
-thick box should be possible to construct from the digits in the box
-using the specified arithmetic operation).
-<p>
-To place a number, click in a square to select it, then type the
-number on the keyboard. To erase a number, click to select a square
-and then press Backspace.
-<p>
-Right-click in a square and then type a number to add or remove the
-number as a pencil mark, indicating numbers that you think
-<em>might</em> go in that square.
diff --git a/apps/plugins/puzzles/html/lightup.html b/apps/plugins/puzzles/html/lightup.html
deleted file mode 100644
index 2de2f91..0000000
--- a/apps/plugins/puzzles/html/lightup.html
+++ /dev/null
@@ -1,10 +0,0 @@
-Light Up
-<p>
-Place light bulbs in the grid so as to light up all the blank
-squares. A light illuminates its own square and all the squares in
-the same row or column unless blocked by walls (black squares).
-Lights may not illuminate each other. Each numbered square must be
-orthogonally adjacent to exactly the given number of lights.
-<p>
-Click on a square to place or remove a light. Right-click to place a
-dot indicating that you think there is no light in that square.
diff --git a/apps/plugins/puzzles/html/loopy.html b/apps/plugins/puzzles/html/loopy.html
deleted file mode 100644
index 96f3a9d..0000000
--- a/apps/plugins/puzzles/html/loopy.html
+++ /dev/null
@@ -1,13 +0,0 @@
-Loopy
-<p>
-Form a single closed loop out of the grid edges, in such a way that
-every numbered square has exactly that many of its edges included in
-the loop.
-<p>
-Click on a grid edge to mark it as part of the loop (black), and
-again to return to marking it as undecided (yellow). Right-click on
-a grid edge to mark it as definitely not part of the loop (faint
-grey), and again to mark it as undecided again.
-<p>
-When you have mastered the square grid, look in the Type menu for
-many other types of tiling!
diff --git a/apps/plugins/puzzles/html/magnets.html b/apps/plugins/puzzles/html/magnets.html
deleted file mode 100644
index 2807569..0000000
--- a/apps/plugins/puzzles/html/magnets.html
+++ /dev/null
@@ -1,17 +0,0 @@
-Magnets
-<p>
-Fill each domino shape with either a magnet (consisting of a + and
-&#8722; pole) or a neutral domino (green).
-<p>
-The number of + poles that in each row and column must match the
-numbers along the top and left; the number of &#8722; poles must
-match the numbers along the bottom and right. Two + poles may not be
-orthogonally adjacent to each other, and similarly two &#8722; poles.
-<p>
-Left-click a domino to toggle it between being empty and being a
-magnet (the + is placed in the end you click). Right-click to toggle
-between empty, neutral, and a ?? mark indicating that you're sure
-it's a magnet but don't yet know which way round it goes.
-<p>
-Left-click a clue to mark it as done (grey it out). To unmark a clue
-as done, left-click it again.
diff --git a/apps/plugins/puzzles/html/map.html b/apps/plugins/puzzles/html/map.html
deleted file mode 100644
index 5f81793..0000000
--- a/apps/plugins/puzzles/html/map.html
+++ /dev/null
@@ -1,15 +0,0 @@
-Map
-<p>
-Colour the map with four colours, so that no two adjacent regions
-have the same colour. (Regions touching at only one corner do not
-count as adjacent.) There is a unique colouring consistent with the
-coloured regions you are already given.
-<p>
-Drag from a coloured region to a blank one to colour the latter the
-same colour as the former. Drag from outside the grid into a region
-to erase its colour. (You cannot change the colours of the regions
-you are given at the start of the game.)
-<p>
-Right-drag from a coloured region to a blank one to add dots marking
-the latter region as <em>possibly</em> the same colour as the
-former, or to remove those dots again.
diff --git a/apps/plugins/puzzles/html/mines.html b/apps/plugins/puzzles/html/mines.html
deleted file mode 100644
index d17d6ff..0000000
--- a/apps/plugins/puzzles/html/mines.html
+++ /dev/null
@@ -1,18 +0,0 @@
-Mines
-<p>
-Try to expose every square in the grid that is not one of the hidden
-mines, without opening any square that is a mine.
-<p>
-Click in a square to open it. Every opened square are marked with
-the number of mines in the surrounding 8 squares, if there are any;
-if not, all the surrounding squares are automatically opened.
-<p>
-Right-click in a square to mark it with a flag if you think it is a
-mine. If a numbered square has exactly the right number of flags
-around it, you can click in it to open all the squares around it
-that are not flagged.
-<p>
-The first square you open is guaranteed to be safe, and (by default)
-you are guaranteed to be able to solve the whole grid by deduction
-rather than guesswork. (Deductions may require you to think about
-the total number of mines.)
diff --git a/apps/plugins/puzzles/html/net.html b/apps/plugins/puzzles/html/net.html
deleted file mode 100644
index 08bffba..0000000
--- a/apps/plugins/puzzles/html/net.html
+++ /dev/null
@@ -1,17 +0,0 @@
-Net
-<p>
-Rotate the grid squares so that they all join up into a single
-connected network with no loops.
-<p>
-Left-click in a square to rotate it anticlockwise. Right-click to
-rotate it clockwise. Middle-click, or shift-left-click if you have
-no middle mouse button, to lock a square once you think it is
-correct (so you don't accidentally rotate it again); do the same
-again to unlock it if you change your mind.
-<p>
-Squares connected to the middle square are lit up. Aim to light up
-every square in the grid (not just the endpoint blobs).
-<p>
-When this gets too easy, select a 'wrapping' variant from the Type
-menu to enable grid lines to run off one edge of the playing area
-and come back on the opposite edge!
diff --git a/apps/plugins/puzzles/html/netslide.html b/apps/plugins/puzzles/html/netslide.html
deleted file mode 100644
index f187741..0000000
--- a/apps/plugins/puzzles/html/netslide.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Netslide
-<p>
-Slide the grid squares around so that they all join up into a single
-connected network with no loops.
-<p>
-Click on the arrows at the edges of the grid to move a row or column
-left, right, up or down. The square that falls off the end of the
-row comes back on the other end.
-<p>
-Squares connected to the middle square are lit up. Aim to light up
-every square in the grid (not just the endpoint blobs).
-<p>
-Connecting across a red barrier line is forbidden. On harder levels,
-there are fewer barriers, which makes it harder rather than easier!
diff --git a/apps/plugins/puzzles/html/palisade.html b/apps/plugins/puzzles/html/palisade.html
deleted file mode 100644
index 5b6b933..0000000
--- a/apps/plugins/puzzles/html/palisade.html
+++ /dev/null
@@ -1,11 +0,0 @@
-Palisade
-<p>
-Draw lines along the grid edges, in such a way that the grid is
-divided into connected regions, all of the size shown in the status
-line. Also, each square containing a number should have that many of
-its edges drawn in.
-<p>
-Click on a grid edge to mark it as a division between regions (black),
-and again to return to marking it as undecided (yellow). Right-click
-on a grid edge to mark it as definitely not part of the loop (faint
-grey), and again to mark it as undecided again.
diff --git a/apps/plugins/puzzles/html/pattern.html b/apps/plugins/puzzles/html/pattern.html
deleted file mode 100644
index 54e05d6..0000000
--- a/apps/plugins/puzzles/html/pattern.html
+++ /dev/null
@@ -1,12 +0,0 @@
-Pattern
-<p>
-Fill in the grid with a pattern of black and white squares, so that
-the numbers in each row and column match the lengths of consecutive
-runs of black squares.
-<p>
-Left-click in a square to mark it black; right-click (or hold Ctrl
-while left-clicking) to mark it white. Click and drag along a row or
-column to mark multiple squares black or white at once. Middle-click
-(or hold Shift while left-clicking) to return a square to grey
-(meaning undecided): dragging like that can erase a whole rectangle,
-not just a row or column.
diff --git a/apps/plugins/puzzles/html/pearl.html b/apps/plugins/puzzles/html/pearl.html
deleted file mode 100644
index 2ca25a5..0000000
--- a/apps/plugins/puzzles/html/pearl.html
+++ /dev/null
@@ -1,13 +0,0 @@
-Pearl
-<p>
-Draw a single closed loop by connecting together the centres of
-adjacent grid squares, so that some squares end up as corners, some as
-straights (horizontal or vertical), and some may be empty. Every
-square containing a black circle must be a corner not connected
-directly to another corner; every square containing a white circle
-must be a straight which is connected to <em>at least one</em> corner.
-<p>
-Drag between squares to draw or undraw pieces of the loop.
-Alternatively, left-click the edge between two squares to turn it on
-or off. Right-click an edge to mark it with a cross indicating that
-you are sure the loop does not go through it.
diff --git a/apps/plugins/puzzles/html/pegs.html b/apps/plugins/puzzles/html/pegs.html
deleted file mode 100644
index 4a23788..0000000
--- a/apps/plugins/puzzles/html/pegs.html
+++ /dev/null
@@ -1,8 +0,0 @@
-Pegs
-<p>
-Jump one peg over another to remove the one you jumped over. Try to
-remove all but one peg.
-<p>
-Drag a peg into an empty space to make a move. The target space must
-be exactly two holes away from the starting peg, in an orthogonal
-direction, and there must be a peg in the hole in between.
diff --git a/apps/plugins/puzzles/html/range.html b/apps/plugins/puzzles/html/range.html
deleted file mode 100644
index bb5b59c..0000000
--- a/apps/plugins/puzzles/html/range.html
+++ /dev/null
@@ -1,21 +0,0 @@
-Range
-<p>
-Colour some squares black, so as to meet the following conditions:
-<ul>
-<li>
-No two black squares are orthogonally adjacent.
-<li>
-No group of white squares is separated from the rest of the grid by
-black squares.
-<li>
-Each numbered cell can see precisely that many white squares in
-total by looking in all four orthogonal directions, counting itself.
-(Black squares block the view. So, for example, a 2 clue must be
-adjacent to three black squares or grid edges, and in the fourth
-direction there must be one white square and then a black one beyond
-it.)
-</ul>
-
-<p>
-Left-click to colour a square black. Right-click to mark a square
-with a dot, if you know it should not be black.
diff --git a/apps/plugins/puzzles/html/rect.html b/apps/plugins/puzzles/html/rect.html
deleted file mode 100644
index d23d827..0000000
--- a/apps/plugins/puzzles/html/rect.html
+++ /dev/null
@@ -1,10 +0,0 @@
-docname=rectangles:Rectangles
-<p>
-Draw lines along the grid edges to divide the grid into rectangles,
-so that each rectangle contains exactly one numbered square and its
-area is equal to the number written in that square.
-<p>
-Click and drag from one grid corner to another, or from one square
-centre to another, to draw a rectangle. You can also drag along a
-grid line to just draw a line at a time, or just click on a single
-grid edge to draw or erase it.
diff --git a/apps/plugins/puzzles/html/samegame.html b/apps/plugins/puzzles/html/samegame.html
deleted file mode 100644
index e6de095..0000000
--- a/apps/plugins/puzzles/html/samegame.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Same Game
-<p>
-Try to empty the playing area completely, by removing connected
-groups of two or more squares of the same colour. Then try to score
-as much as possible, by removing large groups at a time instead of
-small ones.
-<p>
-Click on a coloured square to highlight the rest of its connected
-group. The status line will print the number of squares selected,
-and the score you would gain by removing them. Click again to remove
-the group; other squares will fall down to fill the space, and if
-you empty a whole column then the other columns will move up. You
-cannot remove a single isolated square: try to avoid dead-end
-positions where all remaining squares are isolated.
diff --git a/apps/plugins/puzzles/html/signpost.html b/apps/plugins/puzzles/html/signpost.html
deleted file mode 100644
index fa23e99..0000000
--- a/apps/plugins/puzzles/html/signpost.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Signpost
-<p>
-Connect all the squares together into a sequence, so that every
-square's arrow points towards the square that follows it (though the
-next square can be any distance away in that direction).
-
-<p>
-Left-drag from a square to the square that should follow it, or
-right-drag from a square to the square that should precede it.
-
-<p>
-Left-drag a square off the grid to break all links to it. Right-drag
-a square off the grid to break all links to it and everything else
-in its connected chain.
diff --git a/apps/plugins/puzzles/html/singles.html b/apps/plugins/puzzles/html/singles.html
deleted file mode 100644
index 252bffb..0000000
--- a/apps/plugins/puzzles/html/singles.html
+++ /dev/null
@@ -1,11 +0,0 @@
-Singles
-<p>
-Black out some of the squares, in such a way that:
-<ul><li>no number appears twice in any row or column
-<li>no two black squares are adjacent
-<li>the white squares form a single connected group (connections
-along diagonals do not count).</ul>
-<p>
-Click in a square to black it out, and again to uncover it.
-Right-click in a square to mark it with a circle, indicating that
-you're sure it should <em>not</em> be blacked out.
diff --git a/apps/plugins/puzzles/html/sixteen.html b/apps/plugins/puzzles/html/sixteen.html
deleted file mode 100644
index 4530469..0000000
--- a/apps/plugins/puzzles/html/sixteen.html
+++ /dev/null
@@ -1,8 +0,0 @@
-Sixteen
-<p>
-Slide the grid squares around so that the numbers end up in
-consecutive order from the top left corner.
-<p>
-Click on the arrows at the edges of the grid to move a row or column
-left, right, up or down. The square that falls off the end of the
-row comes back on the other end.
diff --git a/apps/plugins/puzzles/html/slant.html b/apps/plugins/puzzles/html/slant.html
deleted file mode 100644
index d6d31aa..0000000
--- a/apps/plugins/puzzles/html/slant.html
+++ /dev/null
@@ -1,9 +0,0 @@
-Slant
-<p>
-Fill in a diagonal line in every grid square so that there are no
-loops in the grid, and so that every numbered point has that many
-lines meeting at it.
-<p>
-Left-click in a square to mark it with a <code>\</code>; right-click
-to mark it with a <code>/</code>. Keep clicking in a square to
-cycle it between <code>\</code>, <code>/</code> and empty.
diff --git a/apps/plugins/puzzles/html/solo.html b/apps/plugins/puzzles/html/solo.html
deleted file mode 100644
index 88ebd5c..0000000
--- a/apps/plugins/puzzles/html/solo.html
+++ /dev/null
@@ -1,20 +0,0 @@
-Solo
-<p>
-Fill in a number in every square so that every number appears
-exactly once in each row, each column and each block marked by thick
-lines.
-<p>
-To place a number, click in a square to select it, then type the
-number on the keyboard. To erase a number, click to select a square
-and then press Backspace.
-<p>
-Right-click in a square and then type a number to add or remove the
-number as a pencil mark, indicating numbers that you think
-<em>might</em> go in that square.
-<p>
-When you master the basic game, try Jigsaw mode (irregularly shaped
-blocks), X mode (the two main diagonals of the grid must also
-contain every number once), Killer mode (instead of single-cell
-clues you are given regions of the grid each of which must add up to
-a given total, again without reusing any digits), or all of those at
-once!
diff --git a/apps/plugins/puzzles/html/tents.html b/apps/plugins/puzzles/html/tents.html
deleted file mode 100644
index e3f6d5f..0000000
--- a/apps/plugins/puzzles/html/tents.html
+++ /dev/null
@@ -1,20 +0,0 @@
-Tents
-<p>
-Place tents in the empty squares in such a way that:
-<ul>
-<li>no two tents are adjacent, even diagonally
-<li>the number of tents in each row and column matches the numbers
-around the edge of the grid
-<li>it is possible to match tents to trees so that each tree is
-orthogonally adjacent to its own tent (but may also be adjacent to
-other tents).
-</ul>
-<p>
-Click in a square to place or remove a tent. Right-click to mark a
-square as empty (not a tent). Right-click and drag along a row or
-column to mark many squares at once as empty.
-<p>
-Warning '!' marks appear to indicate adjacent tents. Numbers round
-the edge of the grid light up red to indicate they do not match the
-number of tents in the row. Groups of tents light up red to indicate
-that they have too few trees between them, and vice versa.
diff --git a/apps/plugins/puzzles/html/towers.html b/apps/plugins/puzzles/html/towers.html
deleted file mode 100644
index a710e0a..0000000
--- a/apps/plugins/puzzles/html/towers.html
+++ /dev/null
@@ -1,22 +0,0 @@
-Towers
-<p>
-Fill in the grid with towers whose heights range from 1 to the grid
-size, so that every possible height appears exactly once in each row
-and column, and so that each clue around the edge counts the number
-of towers that are visible when looking into the grid from that
-direction. (Taller towers hide shorter ones behind them. So the
-sequence 2,1,4,3,5 would match a clue of 3 on the left, because the
-1 is hidden behind the 2 and the 3 is hidden behind the 4. On the
-right, it would match a clue of 1 because the 5 hides everything
-else.)
-<p>
-To place a tower, click in a square to select it, then type the
-desired height on the keyboard. To erase a tower, click to select a
-square and then press Backspace.
-<p>
-Right-click in a square and then type a number to add or remove the
-number as a pencil mark, indicating tower heights that you think
-<em>might</em> go in that square.
-<p>
-Left-click on a clue to mark it as done (grey it out). To unmark a
-clue as done, left-click on it again.
\ No newline at end of file
diff --git a/apps/plugins/puzzles/html/tracks.html b/apps/plugins/puzzles/html/tracks.html
deleted file mode 100644
index afabed3..0000000
--- a/apps/plugins/puzzles/html/tracks.html
+++ /dev/null
@@ -1,19 +0,0 @@
-Tracks
-<p>
-Complete the track from A to B so that the rows and
-columns contain the same number of track segments as are indicated in the
-clues to the top and right of the grid. There are only straight and
-90-degree curved rail sections, and the track may not cross itself.
-<p>
-Left-click on an edge between two squares to add a track segment between
-the two squares. Right-click on an edge to add a cross on the edge,
-indicating no track is possible there.
-<p>
-Left-click in a square to add a colour indicator showing that you know the
-square must contain a track, even if you don't know which edges it crosses
-yet. Right-click in a square to add a cross indicating it contains no
-track segment.
-<p>
-Left- or right-drag between squares to lay a straight line of is-track or
-is-not-track indicators, useful for filling in rows or columns to match the
-clue.
diff --git a/apps/plugins/puzzles/html/twiddle.html b/apps/plugins/puzzles/html/twiddle.html
deleted file mode 100644
index 5f94e4e..0000000
--- a/apps/plugins/puzzles/html/twiddle.html
+++ /dev/null
@@ -1,15 +0,0 @@
-Twiddle
-<p>
-Rotate square sections of the grid to arrange the squares into
-numerical order starting from the top left.
-<p>
-In the basic game, you rotate a 2&times;2 square section. Left-click
-in the centre of that section (i.e. on a corner point between four
-squares) to rotate the whole section anticlockwise. Right-click to
-rotate the section clockwise.
-<p>
-When you master the basic game, go to the Type menu to try it with
-larger rotating groups (for a 3&times;3 group you must click in the
-centre of a square to rotate the block around it). Or select the
-'orientable' mode in which every square must end up the right way
-round as well as in the right place. Or both!
diff --git a/apps/plugins/puzzles/html/undead.html b/apps/plugins/puzzles/html/undead.html
deleted file mode 100644
index c21374f..0000000
--- a/apps/plugins/puzzles/html/undead.html
+++ /dev/null
@@ -1,22 +0,0 @@
-Undead
-<p>
-Fill in every grid square which doesn't contain a mirror with either a
-ghost, a vampire, or a zombie. The numbers round the grid edges show
-how many monsters must be visible along your line of sight if you look
-directly into the grid from that position, along a row or column.
-Zombies are always visible; ghosts are only visible when reflected in
-at least one mirror; vampires are only visible when not reflected in
-any mirror.
-
-<p>
-To place a monster, click in a square to select it, then type the
-monster's letter on the keyboard: G for a ghost, V for a vampire or Z
-for a zombie. To erase a monster, click to select a square and then
-press Backspace.
-<p>
-Right-click in a square and then type a letter to add or remove the
-monster as a pencil mark, indicating monsters that you think
-<em>might</em> go in that square.
-<p>
-Left-click on a clue to mark it as done (grey it out). To unmark a
-clue as done, left-click on it again.
diff --git a/apps/plugins/puzzles/html/unequal.html b/apps/plugins/puzzles/html/unequal.html
deleted file mode 100644
index 085f82e..0000000
--- a/apps/plugins/puzzles/html/unequal.html
+++ /dev/null
@@ -1,14 +0,0 @@
-Unequal
-<p>
-Fill in the grid with numbers from 1 to the grid size, so that every
-number appears exactly once in each row and column, and so that all
-the <code>&lt;</code> signs represent true inequalities (i.e. the
-number at the pointed end is smaller than the number at the open end).
-<p>
-To place a number, click in a square to select it, then type the
-number on the keyboard. To erase a number, click to select a square
-and then press Backspace.
-<p>
-Right-click in a square and then type a number to add or remove the
-number as a pencil mark, indicating numbers that you think
-<em>might</em> go in that square.
diff --git a/apps/plugins/puzzles/html/unruly.html b/apps/plugins/puzzles/html/unruly.html
deleted file mode 100644
index 2cd3fb2..0000000
--- a/apps/plugins/puzzles/html/unruly.html
+++ /dev/null
@@ -1,11 +0,0 @@
-Unruly
-<p>
-Colour every square either black or white, in such a way that:
-<ul><li>no three consecutive squares, horizontally or vertically, are
-the same colour
-<li>each row and column contains the same number of black and white
-squares.</ul>
-<p>
-Left-click in an empty square to turn it black, or right-click to turn
-it white. Click again in an already-filled square to cycle it between
-black and white and empty; middle-click to reset any square to empty.
diff --git a/apps/plugins/puzzles/html/untangle.html b/apps/plugins/puzzles/html/untangle.html
deleted file mode 100644
index 7171a3d..0000000
--- a/apps/plugins/puzzles/html/untangle.html
+++ /dev/null
@@ -1,5 +0,0 @@
-Untangle
-<p>
-Move the points around so that none of the lines cross.
-<p>
-Click on a point and drag it to move it.