Shuzzles · ShudokuMonday, 5 October 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
26 clues · difficulty rating 430 · 55 logical stepsTechniques: BUG+1Pinch points: 2 (moments with only one move available) · average choices per step 5.4
shuzzles.co.uk/shudoku/2026-10-05/diabolical/