Shuzzles · ShudokuSunday, 27 September 2026
DiabolicalSwordfish, XYZ- and W-Wings, unique rectangles. Still pure logic — but only just.
26 clues · difficulty rating 430 · 57 logical stepsTechniques: Naked Pair, Unique Rectangle, BUG+1Pinch points: 5 (moments with only one move available) · average choices per step 4.4
shuzzles.co.uk/shudoku/2026-09-27/diabolical/