Puzzlers and previous guests Nicholas J Johnson and Lawrence Leung return to play and discuss Leonard Boyd and David Brashaw’s 2015 board game Clacks, based on Terry Pratchett’s 33rd Discworld novel, Going Postal.

Postmaster General Moist von Lipwig has come up with a plan to prove the Ankh-Morpork postal service is still relevant – a race against the Grand Trunk Semaphore Company! The Grand Trunk has a monopoly on the “Clacks”, a system of optical telegraph towers which transmit messages using patterns formed by a grid of six lights – surely they can beat a man on a horse? But the Grand Trunk knows Moist has something up his sleeve, and they’re taking no chances – the fastest and best new Clacks operators will have to prove they’re worthy of the job by racing each other first…

The fifth (and so far final) Discworld board game, Clacks is the second Discworld design by Boyd and Brashaw’s BackSpindle games (following Guards! Guards!). Clacks turns the race at the climax of Going Postal into a logic puzzle where up to four players must use punch cards to turn patterns of lights on and off in a grid, hoping to form another pattern which equates to a letter in Clacks code. It’s a race to finish your word (or words) first, either against each other, or as a team against Moist von Lipwig – but sharing the same grid of lights makes this puzzle very unpredictable.

Is it Discworldy enough? Does it feel like the Clacks technology of the books? Do you find it fun or funny, and do you prefer it collaborative or cooperative? And what else would you play to get your logic puzzle fix? Oh, and if you want to try making the longest sentence you can out of our Clacks words, the ones we drew were SHINE, SONKY, MAGIC, URIKA, ADORA, TOMAS, GUILD, QUIRM, RUFUS, GROAT, MONKS, GNOME, PIXIE, TROLL, TURVY, ANDRE, AHMED, CELYN, THIEF and KLOTZ. Let us know how you went using the hashtag #Pratchat82.

Guest Nicholas J Johnson is an author, magician, educator and expert in deception, who goes by the nickname “Australia’s Honest Con-Man”. You can find details of Nick’s shows and workshops, including his upcoming magic show for children at the 2025 Melbourne Comedy Festival, at conman.com.au, or follow him on Bluesky, Instagram or Facebook as @honestconman.

Guest Lawrence Leung is a comedian, screenwriter and actor, known to Australian audiences for live and screen comedy, including the 2015 feature film Sucker, and more recently appearances in My Life is Murder, Aunty Donna’s Comedy Cafe and Time Bandits. For all the latest about Lawrence, including his upcoming research into seances and mediums in Victorian Melbourne, visit lawrenceleung.com, or follow him on Instagram at @mrlawrenceleung.

You can find episode notes and errata on our web site. One quick correction: Marc Burrows’ one man show The Magic of Terry Pratchett is on in Adelaide from 21 February to 7 March. See the full notes for details.

We’ll be kicking off the new year with one of the few Discworld novels we have left – and why not go large with the longest Pratchett novel of all, Unseen Academicals? We’ll be lacing up our football boots and dusting off our mortarboards alongside returning guest Tansy Rayner Roberts! Send us your questions via email ([email protected]), or social media. Use the hashtag #Pratchat83.

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