Shuzzles · ShudokuSunday, 13 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
26 clues · difficulty rating 430 · 58 logical stepsTechniques: Naked Pair, Pointing Pair/Triple, Unique RectanglePinch points: 6 (moments with only one move available) · average choices per step 7.2
shuzzles.co.uk/shudoku/2026-09-13/diabolical/