Shuzzles · ShudokuMonday, 31 August 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
28 clues · difficulty rating 430 · 56 logical stepsTechniques: Pointing Pair/Triple ×2, W-WingPinch points: 5 (moments with only one move available) · average choices per step 7.1
shuzzles.co.uk/shudoku/2026-08-31/diabolical/