Every Puzzle Page Killer Sudoku answer published during 2021 — 105 solved grids in total. Each date below opens the completed board for that day.
This is one year of the full Killer Sudoku archive, which runs from 2018-01-06 to 2026-08-29. You can also browse all 20 Puzzle Page games.
2021 Killer Sudoku Answers
How Puzzle Page Killer Sudoku Works
Sudoku with cages. Each dashed cage sums to a printed total, and digits never repeat inside a cage.
Tips for Puzzle Page Killer Sudoku
- 1
Learn the fixed combinations: a two-cell cage summing to 3 is always 1+2; 17 is always 8+9.
- 2
Use the rule that each row, column and box sums to 45 — a cage crossing a boundary reveals the leftover.
- 3
Small cages with extreme totals are the best starting points.
- 4
Cage totals constrain candidates before normal Sudoku logic even begins, so work them first.
- 5
Learn the fixed cages: a two-cell cage summing to 3 is 1+2, to 17 is 8+9, and a three-cell cage summing to 6 is 1+2+3. These need no working out.
- 6
Every row, column and box totals 45. If a cage overhangs a box by one cell, that cell equals the cage total minus 45 — a free placement.
Puzzle Page Killer Sudoku Facts
| Puzzle type | Killer Sudoku |
|---|---|
| Year | 2021 |
| Puzzles this year | 105 |
| Full archive | 1,882 puzzles |
Puzzle Page Killer Sudoku Questions
Do digits repeat inside a cage?
Is Killer harder than standard Sudoku?
How many Killer Sudoku answers are in this archive?
What are the dashed outlines?
Why does Killer Sudoku start with no numbers?
Can a digit repeat inside a cage?
3 Tips for Puzzle Page
The board is the whole puzzle
Every answer is built from what the level actually shows you and nothing else. Counting that first rules out most of what comes to mind, which is quicker than trying words and being rejected.
Place the longest answer first
Long answers use up the awkward letters and leave a set that spells the short ones out for you. Starting long is consistently faster than sweeping for three-letter words.
Neighbouring levels are the best hint
Difficulty climbs gradually rather than in jumps, so the levels either side of a hard one reuse its patterns. They are more useful than any hint the game sells you.
How to Solve a Puzzle Page Level
The order that clears a board fastest.
Read what you are given
Letters, tiles or clues — count them before you start. That constraint is the strongest filter you have.
Anchor with the answers you are sure of
Each confirmed answer narrows the ones it touches, so the easy entries are worth the first minute.
Work outwards
Follow the chain from what you have placed rather than jumping around the board.
Verified Answers, Not Guesses
How we verify these answers
Every answer on this page is read from the game's own puzzle data rather than retyped from another site, and is checked against what the board actually provides — so nothing listed can use a letter the level does not give you. The counts shown are computed from the stored data, not typed in by hand.
Reviewed by Priya Raghunathan, Word Games Editor at Puzzle Solved. The full checking routine is in the methodology, and the standards every page is held to are in the editorial policy.
Last checked — Aug 25, 2026