[hitori] Add a strategy page to the documentation

[Philip Withnall <pwithnall src gnome org>]

commit 4047e55a6783e238d733a16d93af913dbd6e5798
Author: Philip Withnall <philip tecnocode co uk>
Date:   Wed Jul 14 22:21:56 2010 +0100

    Add a strategy page to the documentation

 help/C/index.page    |    4 ++++
 help/C/strategy.page |   20 ++++++++++++++++++++
 help/Makefile.am     |    3 ++-
 3 files changed, 26 insertions(+), 1 deletions(-)
---
diff --git a/help/C/index.page b/help/C/index.page
index 5759ebc..bc83247 100644
--- a/help/C/index.page
+++ b/help/C/index.page
@@ -17,4 +17,8 @@
 	<section id="play" style="2column">
 		<title>Basic Gameplay &amp; Usage</title>
 	</section>
+
+	<section id="tips" style="2column">
+		<title>Tips &amp; Tricks</title>
+	</section>
 </page>
diff --git a/help/C/strategy.page b/help/C/strategy.page
new file mode 100644
index 0000000..feb31f4
--- /dev/null
+++ b/help/C/strategy.page
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<page xmlns="http://projectmallard.org/1.0/"; type="topic" id="strategy">
+	<info>
+		<link type="guide" xref="index#tips"/>
+		<desc>Strategies for playing Hitori.</desc>
+	</info>
+	<title>Gameplay Strategies</title>
+
+	<p>Hitori is quite similar to Sudoku, in that it takes logical deduction to work out which cells to paint out. One strategy is to use
+		<key>Shift</key>-clicking to highlight all the repeated numbers in each <em>column</em>, then use <key>Ctrl</key>-clicking to
+		highlight all the repeated numbers in each <em>row</em>.</p>
+	<p>Once this is done for the entire board, the cells which have been highlighted both ways are good candidates for painting, although not
+		always. When painting a cell, unhighlighting the other cells with the same number in the same row and column as that cell is a good
+		way to keep track of which cells are still violating <link xref="game">rule 1 of Hitori</link>.</p>
+	<p>Always bear in mind that rule 2 of Hitori means that two adjacent cells can't both be painted. <app>Hitori</app> will highlight in red the
+		leftmost cell which violates rule 2.</p>
+
+	<p>If you get stuck at any point, choose <guiseq><gui style="menu">Game</gui><gui style="menuitem">Hint</gui></guiseq> for <app>Hitori</app>
+		to flag a cell which should be painted or unpainted to move closer to a solution.</p>
+</page>
diff --git a/help/Makefile.am b/help/Makefile.am
index 52a2cf8..58d114c 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -9,7 +9,8 @@ DOC_PAGES = \
 	game.page \
 	index.page \
 	license.page \
-	playing.page
+	playing.page \
+	strategy.page
 
 EXTRA_DIST = ChangeLog.pre-0-2-2