Shuzzles · ShudokuMonday, 14 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
27 clues · difficulty rating 455 · 64 logical stepsTechniques: Pointing Pair/Triple ×4, Hidden Pair ×2, Naked Pair, Simple Colouring ×2, XYZ-WingPinch points: 9 (moments with only one move available) · average choices per step 5.7
shuzzles.co.uk/shudoku/2026-09-14/diabolical/