Shuzzles · ShudokuSaturday, 12 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
26 clues · difficulty rating 430 · 63 logical stepsTechniques: Box/Line Reduction ×4, Pointing Pair/Triple, Naked Pair, Hidden Pair, Unique RectanglePinch points: 6 (moments with only one move available) · average choices per step 6.1
shuzzles.co.uk/shudoku/2026-09-12/diabolical/