Daily Sudoku Streak

What Daily Sudoku Streak is

Daily Sudoku Streak is a 9x9 sudoku built around a shared calendar: one puzzle is posted each day for every player, with endless Easy, Medium and Hard grids available alongside it. The catalog files it as logic and sudoku, Medium difficulty, age 16+, with sessions around ten minutes on desktop and mobile. Pencil marks, an eraser and an optional hint are the whole toolkit, and the levels award up to three stars.

The daily grid is the part that changes the habit. A normal sudoku collection asks you to pick a puzzle; here the day picks one for you, the same unique board for everyone who opens the page, so progress is measured by showing up as much as by solving. The streak counter sits on top of that rhythm, and the endless levels are there for the days when one grid is not enough.

How to play, step by step

Tap a cell, then tap a number on the keypad to place it. That two-tap loop is the entire input method, and it works the same with a mouse or a thumb. Toggle pencil mode before entering candidates so the small notes sit inside the cell instead of replacing its value; switch back for a real digit. The eraser clears a mistake, and the optional hint unsticks a grid when a chain has gone cold.

Start by scanning the three rows, columns and boxes that cross the cell you are considering. If a digit can only legally sit in one place in a box, that is a placement you can make immediately; if two cells share the same pair of candidates, those notes are doing their job as bookkeeping. Enter certain digits first and leave the pencil work for the cells where the choice is genuinely open.

The daily and the endless modes share the same rules, so the habit transfers. Play the daily grid first while your attention is freshest, then use the level list for practice at the difficulty you actually enjoy. The three-star rating on levels is a reason to replay a board rather than race to the next one: a clean solve with fewer wrong turns reads better than a fast one that leaned on hints.

Technique: notes, pairs and the hint button

Pencil marks are not decoration; they are the game's memory. When a cell has two or three candidates, writing them down prevents the common failure of re-deriving the same possibility three times. The useful next step is to look for a candidate that appears exactly twice in a row, column or box: those pairs constrain each other, and resolving one often unlocks the other.

Singles come in two flavours. A naked single is a cell with one legal candidate left; a hidden single is a digit with only one legal home in a unit. Scan for both before reaching for anything more elaborate, because most daily-grid stalls are one missed single rather than a missing advanced technique. The hint button is best treated as a diagnostic: take it when the board is stuck, then ask which unit you failed to scan, so the next grid teaches you something.

Resist guessing. A sudoku is a deduction game, and a wrong digit poisons every note around it; the eraser is there for honest mistakes, not for a search strategy. If two candidates look equally plausible, leave them in pencil and move to a different unit. The board usually resolves the ambiguity from the other side, and a slow, certain solve protects the streak better than a fast, lucky one.

Difficulty, sessions and devices

Medium is the catalog's rating, but the difficulty selector puts Easy and Hard within reach on the same page, so the honest way to use the game is to set the level to the grid you can finish without guessing. Ten minutes is a fair estimate for a daily solve, and the two-tap input suits a phone in one hand.

It runs free in the browser on desktop and mobile, with no download and no account, and the game page's Facts table carries the current controls and accessibility notes for the third-party build. If the daily habit sticks, the site's sudoku and logic hubs collect the other grid puzzles one click away.

Frequently asked questions