NOT GOT MUCH TIME?
One, five and ten-minute introductions to key principles to get you started.
Lots of instant help with common problems and quick tips for success, based on the author's many years of experience.
Tests in the book and online to keep track of your progress.
EXTEND YOUR KNOWLEDGE
Extra online articles at www.teachyourself.com to give you a richer understanding of how to win at sudoku.
FIVE THINGS TO REMEMBER
Quick refreshers to help you remember the key facts.
Innovative exercises illustrate what you've learnt and how to use it.
Section 4 gives 14 exercises that will allow the reader to practice the techniques given in section 3. These exercises, with solutions, provide additional instructions on the application of section 3 techniques.
Section 5 gives 16 puzzles to solve, with answers. The first 4 puzzles are for warm up and are labeled Evil. The 12 puzzles that follow the Evil puzzles are very difficult and are labeled Extreme. This section could be considered a graduation exercise.
Odd word out
The themes in the following words are identical, but totally different! Which is the odd word out in each case?
a) ANGLE, BRING, CLAMP, DIRTY, EXACT, FIELD, GRASS, HEART, IMAGE, JAUNT
b) ABBEY, BURST, COURT, DRINK, ENJOY, FOUND, GIANT, HARMS, IDIOT, JUMPY
My first is in a combine harvester, but not in a ploughshare.
My second is in a pigsty, but not in a cowshed.
My third does not exist.
My whole is in a farmyard, but not in a jungle.
GCHQ is a top-secret intelligence and security agency which recruits some of the very brightest minds. Over the years, their codebreakers have helped keep our country safe, from the Bletchley Park breakthroughs of WWII to the modern-day threat of cyberattack. So it comes as no surprise that, even in their time off, the staff at GCHQ love a good puzzle. Whether they're recruiting new staff or challenging each other to the toughest Christmas quizzes and treasure hunts imaginable, puzzles are at the heart of what GCHQ does. Now they're opening up their archives of decades' worth of codes, puzzles and challenges for everyone to try.
In this book you will find:
- Tips on how to get into the mindset of a codebreaker
- Puzzles ranging in difficulty from easy to brain-bending
- A competition section where we search for Britain's smartest puzzler
'Fiendish . . . as frustrating, divisive and annoying as it is deeply fulfilling: the true spirit of Christmas' The Guardian
'Ideal for the crossword enthusiast' Daily Telegraph