SudoKru
Multiplayer sudoku, free in your browser
Grab your Kru, race the grid
Sudoku with a crew: race the clock solo on four difficulties, take on the shared daily grid, solve one live board as a Kru of 2 to 4, or climb the ELO ladder in rated Battles of up to 4. Kru Academy teaches the techniques belt by belt, and Community Grids let you build, publish and race any grid.
Free in your browser, no account needed to join.
Free while we're in early access: the full game, no charge. See the founder deal
Ways to play
Modes
Solo
Easy, medium, hard or expert. Race the clock at your own pace, with pencil notes and aids you can switch on.
Daily grid
One shared puzzle a day, the same for everyone. Compare your time with the whole crew.
Kru co-op
2 to 4 players on one live grid. Call your lane, fill your boxes, watch every digit land as it happens.
Rated Battle
2 to 4 rivals race the same grid. Win, climb the ELO ladder, send challenges.
Free account needed
Kru Academy
Five belts from Rock Pool to Abyss: technique lessons, drills on real grids and a belt exam for each.
Community Grids
Build a grid in the Grid Studio, publish it, like the best ones and play any grid solo, as a Kru or in a Battle.
How to play
How SudoKru plays
- 1
Pick a mode: solo, the daily, a Kru or a Battle.
- 2
Share the room code with your crew: they join from any browser, no account needed.
- 3
Fill the grid: every digit shows up live on every screen, and Kru cheers each solved box.
The rules in short
Standard sudoku rules apply: fill the 9 by 9 grid so that every row, every column and every 3 by 3 box holds the digits 1 to 9 exactly once. In solo you play against the clock on four difficulties, with optional pencil notes and aids. The daily is one shared grid, identical for everyone that day. In a Kru, 2 to 4 players solve the same grid together in real time, and each move is visible to all. In a Battle, 2 to 4 rivals race separate copies of the same grid; the first correct finish wins, ratings move with ELO, and mistakes are capped. Kru Academy teaches solving techniques belt by belt, with lessons, drills and exams. Community Grids adds a Grid Studio to build, publish and play grids made by other players.
Signature features
What makes SudoKru different
Kru Academy
Learn sudoku from Kru himself: five belts, technique lessons, drills on real grids and belt exams.
Community Grids
The Grid Studio: build a grid, publish it, like and play grids from other players in any mode.
Notes and room aids
Pencil notes with a clear-notes tool in every mode, and room aids the Kru creator decides on.
SudoKru questions
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Host it at your event
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Free while we're new
Every game, every feature, free during early access. Early players get founder perks.