A sudoku or puzzle-solving competition looks simple to run — hand out a sheet, start a timer, collect it — until two entrants finish at the same minute with the same number of grids solved, and nobody wrote down what breaks the tie. Puzzle items are different from both stage items and craft items: there is a single objectively correct answer, so the usual talk of “originality” or “showmanship” does not apply. What you actually need is a clean scoring and timing rule, a tie-break order fixed in advance, and an answer key nobody can dispute. This page gives you a ready scoring scheme, a printable scoresheet, a deduction table and the rules to settle before entries open.
What makes puzzle-solving different from a quiz
A quiz is oral or buzzer-based, runs in rounds, and usually involves a team. A puzzle-solving competition is individual, written, and silent — every entrant works the same sheet of sudoku, kakuro, word-search, logic or number-puzzle grids at their own table, against the clock, with no panel judging quality or presentation. There is nothing subjective to score: a grid is either fully and correctly solved or it is not. That makes the event easy to referee fairly, but only if the points-per-grid, the time limit and the tie-break order are fixed and published before the first sheet is handed out — not improvised while two finalists are tied on the results table.
This is also why puzzle-solving suits a wide age range in one event: a junior sheet of four easy 6×6 or 9×9 grids and a senior sheet of six grids including a harder variant (killer sudoku, diagonal sudoku, kakuro) can run side by side in the same hall under the same rules, just with different sheets and different age-wise time limits.
Sudoku & puzzle-solving competition scoring (sample scheme)
Score on two numbers, not one: grids correctly completed, and time taken. Publish the scheme below, adapted to your own grid count and time limit.
| Element | How it’s scored | Points |
|---|---|---|
| Each fully correct grid | Every cell filled and valid — rows, columns and boxes/regions all satisfied | 10 pts per grid |
| Partially filled / one error | No partial credit for an incomplete or incorrect grid — all-or-nothing per grid, decided before entries open and stated on the sheet | 0 |
| Bonus for hardest grid attempted | Optional: a named “challenge grid” worth extra if your sheet grades difficulty | +5 |
| Speed (tie-break only, not a score component) | Total time to submit, recorded at hand-in — used only to separate equal point totals | — |
Keep points per grid equal unless you have clearly graded the sheet by difficulty and said so in the rules — a sheet that silently mixes an easy 4×4 and a hard killer-sudoku grid at the same 10 points rewards whoever got the easy luck of starting there, not whoever is the stronger solver.
Printable scoresheet for the invigilator
One sheet per entrant, filled in at hand-in and checked against the answer key afterwards — never scored from memory on the spot.
| Field | Entry ___ | Entry ___ | Entry ___ |
|---|---|---|---|
| Grid 1 correct? (Y/N) | |||
| Grid 2 correct? (Y/N) | |||
| Grid 3 correct? (Y/N) | |||
| Grid 4 correct? (Y/N) | |||
| Bonus grid attempted / correct? | |||
| Total points | |||
| Time of submission (hh:mm:ss) | |||
| Deductions (see table below) |
Use entry numbers, not names, on the sheet itself — the same chest-number discipline that keeps judging fair in every other item. For a blank version you can adapt to any scored item, see the judge’s score sheet template.
Deductions, disqualification and the tie-break order
Publish both tables with the entry form. A tie-break decided after the fact is the single biggest source of disputes in a puzzle item.
| Situation | Suggested consequence |
|---|---|
| Erasing/overwriting that makes a final answer unreadable | That grid marked incorrect |
| Calculator, phone, or any aid used at the table | Disqualification |
| Talking to or looking at a neighbour’s sheet | Warning, then disqualification on a second instance |
| Submitting after time is called | Grids completed after the call not counted |
| No name/entry number on the sheet | Held aside until claimed; not scored blind |
Fix the tie-break order in the rules, in this sequence or your own: (1) higher total points, (2) earlier submission time among those tied, (3) fewer grids attempted but all correct over more grids attempted with an error (rewards accuracy over guessing), (4) a sudden-death extra grid for the tied entrants only. Whatever order you choose, write it down before the event — not when two sheets land on the table with identical scores.
Rules to settle before entries open
- Time limit. 20–30 minutes for junior age groups with easier grids, 30–45 minutes for senior sheets with harder variants.
- Grid count and type. How many grids, which variants (classic sudoku, diagonal, killer, kakuro, word-search, logic grid), and whether all entrants in an age group get the identical sheet.
- Writing instrument. Pen only (no pencil-and-erase rewriting mid-solve) is common for fairness, or state if pencil is allowed.
- Aids. No calculators, no phones, no reference sheets — state it explicitly even though it seems obvious.
- Answer key sign-off. Have the answer key checked and signed by a second person before the event starts, so a disputed grid is resolved by comparison, not by argument.
- Tie-break order. Decided and published, as above.
- Individual or team. Almost always individual; if you run a team relay variant (each member solves one grid in sequence), say so and score it separately.
Where puzzle-solving fits in a wider festival
Puzzle-solving sits in the same “intelligence/GK” family as quiz and memory tests, but it is scored, timed and silent rather than oral and round-based — so it runs well as a parallel off-stage item while stage events continue elsewhere, the same way clay modelling or collage does. A typical mix in one event:
| Item | Individual / Team | Suits | Typical time |
|---|---|---|---|
| Sudoku / number puzzles | Individual | UP, HS, HSS | 20–30 min |
| Logic & word puzzles | Individual | UP, HS, HSS | 30 min |
| Chess / board-game tournament | Individual | HS, HSS, open | varies (Swiss rounds) |
| Quiz | Team | UP, HS, HSS | 60–90 min |
| Memory test | Individual | UP, HS | 20–30 min |
For the oral/round-based cousin of this item, see the quiz competition judging & scoring rules and quiz round formats guides.
See it before you set it up
Open a eTalenter live demo and log in as a demo coordinator or judge — no sign-up needed — to see a scored, timed item like this set up end to end: age groups, a competition item with a fixed time limit and maximum score, a public registration form, chest numbers, and results moving straight from entry marks to tabulation and certificates. eTalenter handles the same age-group setup, scheduling and scoring panel for a sudoku block that it does for a stage item — set your grids and time limit once, and reuse it every year. See the arts & school fest management software overview or the judging and tabulation guide for how the scoring side works.
FAQ
How do you score a sudoku or puzzle-solving competition?
Give equal points per fully correct grid (a common scheme is 10 points each, all-or-nothing — no partial credit for an incomplete grid), record submission time separately, and use time only to break ties between equal point totals. There is no subjective judging involved; the answer key decides correctness.
How do you break a tie in a puzzle-solving competition?
Fix the order before the event: higher points first, then earlier submission time, then (optionally) accuracy over grids attempted, then a sudden-death extra grid if still tied. Publish the order with the rules so it is never decided after two sheets come in level.
How long should a sudoku competition round last?
20–30 minutes for junior age groups on easier grids, 30–45 minutes for senior sheets with harder variants such as killer or diagonal sudoku. State the limit and the grid count in advance, and call time clearly so late entries are excluded without dispute.
Talk to us on WhatsApp or write to support@etalenter.com for help setting up your own competition’s scoring.
