This Most Simple Sudoku Rule = Fog Magic

** TODAY'S PUZZLE ** This is one of those incredibly surprising puzzles! It's called The Third Law Of Thermodynamics and it's a new fog sudoku from gdc. The concept is so simple and yet the logic involved is deep and interesting. Just exceptional! Play the puzzle at the link below: https://sudokupad.app/29hyhl8ay5 Rules: Normal sudoku rules apply. Digits along a grey thermometer increase from the bulb end. Thermometers contain exactly 4 digits, only move horizontally and vertically (never diagonally) and don't branch or overlap. Thermometers are partially invisible (even after the fog is cleared). The grid is covered in fog. Placing a correct digit in a cell lifts fog from that cell and possibly other cells. Every 2x2 area in the grid contains at least one digit from each of the sets (123), (456), and (789). ** LIVE CROSSWORD MASTERCLASS ** On March 21, Simon and Mark will appear at the Word=Puzzles conference at Magdelen College, Oxford and do a live episode of their crossword masterclass! More information here: https://www.eventbrite.com/e/word-puz... ** THE HOBBIT BY BLOBZ: NEW SUDOKU HUNT COMPETITION ** On 1 January we launched a brand new sudoku hunt from Blobz, the 'sequel' to his Lord Of The Rings hunt from 2024... The Hobbit! 19 puzzles of Tolkien-themed wonders. Solution videos just out. Check it out for as little as $2/month here:   / crackingthecryptic   ** NURIKABE WORLD STREAM TUESDAY'S STREAM ** You can watch last night's stream here: https://youtube.com/live/D_Hn2cVg5yg The game is available here: https://store.steampowered.com/app/29... ** NEW FOG APP IS OUT ON APPLE (!), STEAM & ANDROID ** Brand new incredible Fog Sudoku puzzles by the likes of Phistomefel, Marty Sears, James Sinclair, Qodec, Dorlir, ThePedallingPianist, Sandra&Nala, Peter Veenis, Mr Menace, Florian Wortmann, Math Pesto & HalfBakedLunatic. https://store.steampowered.com/app/31... ** CRACKING THE CRYPTIC APP ** Our main app (which is itself completely free) contains packs featuring Fog, Domino, Lines, and GAS puzzles, with a few special free sets as well! All the puzzles are hand-crafted by us and some of the best constructors in the world, with hints by Simon and Mark. AppStore: https://apps.apple.com/us/app/crackin... Steam: https://store.steampowered.com/app/20... Android: https://play.google.com/store/apps/de... ▶ SUDOKU PAD - Use Our Software For Your Puzzles ◀ You can input classic sudoku puzzles into our software and help support Sven, the programmer responsible for the wonderful user interface we all use to play these puzzles everyday. The app also comes with 12 handmade puzzles from us: iOS: https://apps.apple.com/us/app/svens-s... Steam: https://store.steampowered.com/app/17... Android: https://play.google.com/store/apps/de... ALSO on Amazon: Search for “SudokuPad” ▶ Contents Of This Video ◀ 0:00 Intro music and puzzle introduction 2:21 Patreon updates 3:43 Our New Fog Sudoku App 4:11 Happy Birthdays 9:27 Rules 11:33 Start of Solve: Let's Get Cracking ▶ Contact Us ◀ Twitter: @Cracking The Cryptic email: [email protected] Our PO Box address: Simon Anthony & Mark Goodliffe Box 102 56 Gloucester Road London SW7 4UB (Please note to use our real names rather than 'Cracking The Cryptic'.) ************************************************************** ▶ CTC FAN DISCORD SERVER◀   / discord   ▶ OUR BACK CATALOGUE – ALL CATEGORISED WITH LINKS!◀ https://tinyurl.com/CTCCatalogue ▶ NEW CRACKING THE CRYPTIC MERCHANDISE◀ https://teespring.com/en-GB/stores/cr... ▶SEND US PUZZLES TO SOLVE/CONTACT US◀ [email protected] ▶FOLLOW US◀ Twitter: @crypticcracking Instagram: https://www.instagram.com/crackingthe... We also post the Wordle In A Minute videos on TikTok. #sudoku #puzzle #thermodynamics