Shuzzles · ShudokuFriday, 18 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
28 clues · difficulty rating 460 · 61 logical stepsTechniques: Pointing Pair/Triple ×2, Box/Line Reduction ×2, Naked Pair, Simple Colouring, Y-Wing, W-WingPinch points: 9 (moments with only one move available) · average choices per step 5.5
shuzzles.co.uk/shudoku/2026-09-18/diabolical/