Shuzzles · ShudokuWednesday, 30 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
28 clues · difficulty rating 681 · 68 logical stepsTechniques: Box/Line Reduction ×3, Pointing Pair/Triple ×2, Naked Pair ×2, Hidden Pair ×2, Simple Colouring, Y-Wing, W-Wing ×2, XYZ-Wing, Unique RectanglePinch points: 15 (moments with only one move available) · average choices per step 4.2
shuzzles.co.uk/shudoku/2026-09-30/diabolical/