Kyudoku (Puzzleship)
Rate itCircle nine cells holding 1 to 9 once each, with no row or column above 9.
on puzzleship.com
Kyudoku asks you to choose nine cells from a grid of digits. Between them they must use each digit from 1 to 9 exactly once, and no row or column may add up to more than 9.
About Kyudoku (Puzzleship)
The two rules pull against each other: you need the large digits to complete the set, but large digits are what break a row or column total. Clicking a cell cycles it between ruled out, selected and clear, and bold cells are given selections.
Working from the top down helps. The 9 must stand alone in its row and column, an 8 can share only with a 1, and by the time you reach the small digits much of the grid has decided itself. A digit that appears only once in the grid must be chosen. Puzzleship also sells printable Kyudoku booklets.
Puzzleship publishes six grids of Kyudoku a day, graded from very easy to ultra hard. Each day's grids are numbered and dated, the same for every player, and a new set goes up at 13:00 UTC, although the page says midnight in your own time; earlier days stay playable in the archive. The site is free with ads, and a premium plan removes them.
How to play Kyudoku (Puzzleship)
- Open Kyudoku and pick one of the day's six grids.
- Look for digits that appear only once; those cells must be chosen.
- Click a cell once to rule it out, twice to select it, a third time to clear.
- Select nine cells with each digit 1 to 9 exactly once.
- Keep every row and column total at 9 or below.
Screenshots
Tips
- Place the 9 first; it rules out its whole row and column.
- Work down from 8 and 7, which leave little room beside them.
- Choose unique digits immediately.
- Write running totals beside rows that are close to 9.
Questions
How many Kyudoku puzzles are there each day?
Six, graded from very easy to ultra hard.
When do new Kyudoku puzzles appear?
At 13:00 UTC. The page says 00:00 in your own time, but each day's set is scheduled for 13:00 UTC and the previous day's grids stay up until then.
Can I play earlier days?
Yes. Puzzleship keeps past puzzles in an archive.
Is it free?
Yes, with ads. A Puzzleship premium plan removes them.
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