Sudoku Addict's Workbook is the follow-up to
Mastering Sudoku, my guide to sudoku
solving. It contains 150 puzzles, ranging from 'moderate' to 'extreme'
difficulty, each one hand-picked to exercise specific solving techniques, and
complete with tips on what to look for. In the solutions you'll find a unique
system of shaded squares showing where individual patterns (pairs, triples,
X-Wings etc) may occur. There's even a 10-page quick reference guide to the
solving techniques you'll need.
A guide to each puzzle.
Workbook is more than just a puzzle collection - it's a hands-on training
programme that takes you through different kinds of puzzle and the techniques
needed to solve them.
Each puzzle is accompanied by notes telling you what to look
for. Sometimes these are general hints ("you'll need to find at least three
pairs"), others they'll point you right at a key candidate pattern which is
appearing for the first time.
By the time you finish the puzzles, you'll have experienced all the major types
of sudoku - puzzles that 'gridlock' early and late, ones that can be broken
using complex static patterns such as Swordfish and Non-Unique rectangles, ones
that require inference chain patterns such as nice loops. Each puzzle comes with
target solving times for Improver, Expert and 'Genius' skill levels, so you can
see how well you're doing.
Extra pattern tips.
|Can't find that crucial candidate pattern? Let
Sudoku Addict's Workbook show you!
In a unique feature, the puzzle solutions show the locations of key patterns
in shaded squares. As well as showing you where to look, the shaded squares also
show you why some patterns let you eliminate candidates from other
In this example of a remote pair chain (right), the four squares have been
solved 8-3-8-3, so any square that's related to an odd and even-numbered square
(e.g. the 1st and 4th) couldn't possibly have contained an 8 or 3.
Solve more efficiently.
Typically in sudoku, a series of relatively easy (but still tricky) candidate
patterns lead up to a tougher one - but if you find the tougher pattern first,
you won't need the easier ones at all.
Efficient solving - looking for the tougher patterns earlier - is a major
theme of Sudoku Addict's Workbook, with hints on puzzles that contain
these 'short cuts'. There's no magic formula for knowing when a more complex
pattern has appeared early in a puzzle, but by working through the examples you
can develop the habit of checking for 'something better' rather than always
settling for the first pattern you find.
Quick techniques reference.
Sudoku Addict's Workbook
contains a 10-page quick reference guide to all the techniques you'll need to
solve the puzzles in the book. It isn't intended as a solving tutorial - for
that, see Mastering Sudoku - instead providing
a quick reminder of how things like pairs, box claims and Swordfish work.
Whether you're at home, on a train or on a beach, you won't need to look
The guide includes some techniques that aren't covered in Mastering Sudoku,
such as BUG and multi-colouring, and extensions to the conjugate pair and
forcing chain patterns. So if you're a Mastering Sudoku reader, you'll learn
All 150 puzzles online.
If you don't want to write
all over the book, or if you just prefer to solve using a keyboard and mouse,
then the answer is here - all 150 puzzles from Sudoku Addict's Workbook
are available online in a readers-only section here at paulspages.co.uk.
If you're a SudokuXP member (see below)
then you'll be able to get more help from SudokuXP's on-screen hints and unique
crosshatching assistant tool, as well as printing puzzles out and saving
part-solved puzzles to disk. And if you're not a member you can load the puzzles
into Sudoku@paulspages, the non-subscription version which
doesn't have hints, but still lets you solve on-screen and print puzzles out.
More than just a puzzle book.
We've all seen
cheaply-produced sudoku puzzle books which contain grids and very little else.
Sudoku Addict's Workbook isn't one of them - with its solving techniques
quick reference, individual puzzle tips, highlighted solutions and puzzles
available online here at paulspages, it's a complete package that will improve
your sudoku skills as you work through it. I hope you enjoy it!
membership, which costs a one-off payment of £3 (roughly $5.90 USD) or £3.51
including VAT for EU residents, with nothing more to pay. SudokuXP
provides on-screen solving hints, a 10,000+ puzzle gallery, 4X4 and 16X16
puzzles and other features. Click here for details.
If you don't have SudokuXP membership, Mastering Sudoku's puzzles will be
loaded into Sudoku@paulspages, the non-subscription version of the program. This
will let you solve, print and export the puzzle, but won't provide hints or full
solving analysis of the more difficult puzzles.
© Paul Stephens 2008. Sudoku Addict's Workbook is
published by Duncan Baird Publishers Ltd, London (www.dbp.co.uk).
Book cover and extract images © Duncan Baird Publishers 2008, used by