What this puzzle trains
This puzzle helps you practice moving from structural eliminations back into quick rescans.
This Hard #249 starts with 28 clues, has a score of 562, and mainly asks you to use Naked Single / Hidden Single / Pointing / X-Wing / XY-Wing.
Puzzle #249 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 Naked Single / Hidden Single / Pointing / X-Wing / XY-Wing?
- 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.