What this puzzle trains
This puzzle helps you practice moving from structural eliminations back into quick rescans.
This Hard #276 starts with 31 clues, has a score of 452, and mainly asks you to use Hidden Single / Pointing / Naked Pair / XY-Wing / Naked Single.
Puzzle #276 appears early in this archive and is a good place to check your baseline accuracy.
Useful habits for this level
- Check X-Wing before deep chain search.
- Use XY-Wing for shared-visibility eliminations.
After-solve notes
Individual puzzle pages are practice stops reached from the archive or strategy guides. After solving, keep these three notes so the next puzzle has a clear learning target.
- At the first stall, did you check "Check X-Wing before deep chain search." before looking for Hidden Single / Pointing / Naked Pair / XY-Wing / Naked Single?
- If you used a hint, write one target cell, elimination, or condition in your own words.
- Choose whether to continue at this level or read the related technique guide before returning.