How it's different
Classic Sudoku 6x6 shrinks the board down further than 8x8: just 6 columns, 6 rows, and the numbers 1 through 6. Like 8x8, the smaller grid means the boxes aren't square - each one here is 2 rows by 3 columns, since 6 doesn't split evenly into a 3x3 shape. A quicker board to scan, with the same core logic as every other genre on zagzook.
How to play
Use your keyboard or the number buttons to fill in the blanks - just 6 to choose from here. The same input modes work exactly as they do everywhere else on zagzook:
Cell First mode: click the cell you want to fill in first, then select the number you want to enter.
Number First mode: select the number you want to enter first, then click the cell you want to fill it into.
Memo mode: pencil in a memo of candidate numbers in a blank cell, instead of committing to one right away.
- Made a mistake? Undo steps back through your moves.
- Stuck? The hint button reveals one correct cell for you.
- Pick your difficulty from the tabs above - each one is a genuinely different puzzle.
- Solve the board completely and it submits automatically.
Rules
Fill in the blanks with numbers from 1 to 6. Each row, column, or 2x3 block must contain the numbers 1 through 6 exactly once.
Strategy tips
- Scan rows before columns. Since each box is wider than tall (3 columns, 2 rows), a completed row often rules out more candidates at once than a completed column.
- Watch both rows of a box together. With only 2 rows per box, a number in one row usually forces its placement fast in the other.
- Lean on notes early. With just 6 numbers to track, pencil-marking is quick to scan - use it freely.
- Start with the fullest rows, columns, and boxes, same fundamental principle as any Sudoku size.
FAQ
Why does this grid use numbers 1-6 instead of 1-9?
Because the board itself is only 6 cells wide and tall - each row, column, and box needs exactly 6 distinct values.
Why are the boxes rectangular instead of square?
6 doesn't divide evenly into a 3x3 shape, so the natural box layout here is 2 rows by 3 columns - a mathematical necessity of the grid size.
Is there only one solution to each puzzle?
Yes, same guarantee as every genre on zagzook.
Can I play the same difficulty more than once in a day?
You can, just for fun - but only your first correct solve of the day counts toward today's leaderboard, and that difficulty locks afterward.
Does switching between numbers, letters, icons, and colors change the puzzle?
No - purely visual, the underlying logic never changes.