A Sudoku With No Visible Cells (!)

*** TODAY’S PUZZLE *** Jay Dyer decides the best way to present a Fog Of War sudoku is with absolutely no cells visible! Blackout, her latest puzzle, is weird and most definitely wonderful with some absolutely unique logic. See if you can find your way through the fog (and don’t cheat!) Play the puzzle at the link below: Rules: Normal sudoku rules apply. Cells are initially covered in fog, and placing correct digits will clear the fog around those digits. Mark nine cells such that there is one marked cell in each row, column and 3x3 box. The digit in the first cell of a row, column or 3x3 box gives the position of the marked cell in that row, column or 3x3 box. Each digit appears in exactly one marked cell. Adjacent digits on a green line differ by at least 5. Eg if r5c3 was a marked cell then r5c1 would be a 3 (marked cell is 3rd position in its row); r1c3 would be a 5 (marked cell is 5th position in its column); and r4c1 would be a 6 (marked cell is the 6th position in normal reading order of its 3x3 box). *** BRAND NEW SUDOKU HUNT JUST OUT *** A new sudoku hunt, Knightmare On Sudoku Street, was released on 1 April. It features 19 new puzzles by the Sudoku Skunkworks! Join us on Patreon for as little as $2 a month to play. *** 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):