Omission Practice Puzzles

Omission, also called Locked Candidates, occurs when a digit's only possible cells in a box all lie in one row or column (or its only cells in a row or column all lie in one box). The digit can then be eliminated from the rest of that line or box.

Every puzzle below is verified to feature the Omission as its hardest required technique — of the 65,284 puzzles in our library, 41,758 require it and 3,857 need nothing harder. New to the pattern? Learn the Omission or see a worked example first.

Curated Omission puzzles

  1. Practice puzzle #1 — 24 givens · needs Naked Single, Omission
  2. Practice puzzle #2 — 23 givens · needs Naked Single, Omission
  3. Practice puzzle #3 — 24 givens · needs Naked Single, Omission
  4. Practice puzzle #4 — 25 givens · needs Naked Single, Omission
  5. Practice puzzle #5 — 25 givens · needs Naked Single, Omission
  6. Practice puzzle #6 — 24 givens · needs Naked Single, Omission
  7. Practice puzzle #7 — 23 givens · needs Naked Single, Omission
  8. Practice puzzle #8 — 24 givens · needs Naked Single, Omission
  9. Practice puzzle #9 — 25 givens · needs Naked Single, Omission
  10. Practice puzzle #10 — 25 givens · needs Naked Single, Omission
  11. Practice puzzle #11 — 26 givens · needs Naked Single, Omission
  12. Practice puzzle #12 — 24 givens · needs Naked Single, Omission
Get a fresh Omission puzzle →

Omission practice FAQ

How many Sudoku puzzles require the Omission technique?
Of the 65,284 puzzles in the Precision Sudoku library, 41,758 require the Omission to solve, and 3,857 can be completed with nothing harder than the Omission. Every puzzle is verified by a solver that records the exact techniques needed.
What is the best way to practice the Omission?
Play puzzles where the Omission is the hardest move required, so every sticking point is an opportunity to apply it. It is a bridge technique between basic singles and the harder pairs and triples; check it whenever a box pins a digit to one line.
Can I play a Sudoku puzzle that needs exactly the Omission?
Yes. The curated puzzles on this page all feature the Omission as their most advanced required technique, and the practice button serves a fresh puzzle from the same verified pool whenever you want another.