![Found this lesser known W-wing pattern when I was doing this puzzle. The blue 1/4 cells form a potential W-wing. If there is no 1 and 4 in the orange cells, you Found this lesser known W-wing pattern when I was doing this puzzle. The blue 1/4 cells form a potential W-wing. If there is no 1 and 4 in the orange cells, you](https://external-preview.redd.it/ZD2ULxW-VxNv6dnO3Y58X3edE5mMzpxapsPfTS3X_aE.png?auto=webp&s=2a71096f46e37d5e81223e626496c8ef64ef2b62)
Found this lesser known W-wing pattern when I was doing this puzzle. The blue 1/4 cells form a potential W-wing. If there is no 1 and 4 in the orange cells, you
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1000 Sudoku Puzzles w/ Solutions Volume 2: Level: Very Easy / Easy / Medium / Hard / Difficult / Insane: Maton, Jay, Coll, Stephen, Johnson, Angela: 9798735836889: Amazon.com: Books
![Spotted my first ALS-W-Wing. Placing 6 in either green squares locks the 7s in both ALSes to r89c2 or r6c4. Since one of these 3 cells has to contain 7, r6c2 (which Spotted my first ALS-W-Wing. Placing 6 in either green squares locks the 7s in both ALSes to r89c2 or r6c4. Since one of these 3 cells has to contain 7, r6c2 (which](https://external-preview.redd.it/TCVAPhNUILQe4tGtlSl019rYTIdBv4_usQc5fJVYf4E.png?auto=webp&s=ded3c6d0d5fe042c86e617e00dccc4da266520ac)