The Sudoku Grid Is ALL Fog??!

*** TODAY’S PUZZLE *** We celebrate Missing A Few Cards’ birthday today but trying another of their collaborations with Full Deck called I’ll Cry If I Want To. And this puzzle might actually make you cry - it’s a ’fog of war’ sudoku with no cells revealed at all. Mark tested it and said it was VERY hard. Simon attempts it in a video and can confirm this assessment... but it’s also as clever as you’d expect from two eminent math professors! Play the puzzle at the link below: Rules: Normal sudoku rules apply. Along modular lines, every set of three contiguous digits has three different remainders when divided by 3. Numbers outside the grid give the sum of the first X digits (the “X-Sum“) along that row or column, where X is the first digit seen from the direction of the clue. In addition to any modular lines revealed as the fog lifts, every X-sum forms a hidden straight modular line at least X cells long starting from the cell closest to the clue. Digits separated by a black dot are in a 1:2 ratio. ALL blacks dots are given. As correct digits are placed, fog will lift, potentially revealing more clues. *** NEW GAS PACK: VOLUME 2 IS OUT *** The new GAS (Genuinely Approachable Sudoku) pack is out on all platforms here: 60 original puzzles by Clover, Bill Murphy and Philip Newman!! Earn party hats and dinosaurs with these brand new puzzles! *** JOIN OUR SUDOKU CLUB ON PATREON *** A new sudoku hunt, Alice’s Adventures In Sudokuland, has been released on 1 March featuring puzzles by Panthera, TheAsylum & Montinox. Remember that patrons gets access to their own special channel on the CtC Fan Discord server - where you can find hints ;) Joining us on Patreon costs as little as $2 a month. ▶ 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: Steam: Android: ALSO on Amazon: Search for “SudokuPad” *** ORDER OUR UPCOMING BOOK HERE *** ▶ Contact Us ◀ Twitter: @Cracking The Cryptic email: crackingthecryptic@ 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’.) ▶ 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: Steam: Android: ALSO on Amazon: Search for “SudokuPad” ************************************************************** ▶ CTC FAN DISCORD SERVER◀ ▶ OUR BACK CATALOGUE – ALL CATEGORISED WITH LINKS!◀ ▶ *NEW* CRACKING THE CRYPTIC MERCHANDISE◀ ▶SEND US PUZZLES TO SOLVE/CONTACT US◀ crackingthecryptic@ ▶FOLLOW US◀ Twitter: #crypticcracking @crypticcracking Instagram (for how to solve daily clues from The Times):