Shuzzles · ShudokuTuesday, 22 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
28 clues · difficulty rating 450 · 60 logical stepsTechniques: Naked Pair ×3, Box/Line Reduction, Simple Colouring, Y-Wing, W-WingPinch points: 6 (moments with only one move available) · average choices per step 5.2
shuzzles.co.uk/shudoku/2026-09-22/diabolical/