Shuzzles · ShudokuThursday, 17 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
26 clues · difficulty rating 480 · 66 logical stepsTechniques: Pointing Pair/Triple ×2, Naked Pair, Y-Wing ×4, Simple Colouring ×3, SwordfishPinch points: 10 (moments with only one move available) · average choices per step 5.8
shuzzles.co.uk/shudoku/2026-09-17/diabolical/