Please use logical thinking instead of guessing! Each puzzle only has one solution.

In pen mode, you can directly import the candidate number by using Shift + number (Alt + number).
In pencil mode, you can directly import numbers by using Shift + number (Alt + number).
Key C (or Del, BackSpace): to deselect the number of the lattice or the candidate number.
Key ESC: to deselect.
Key P: a toggle switch to change from pencil and pen mode.

What is Mini Sudoku

Mini Sudoku is also referred to Small Sudoku. It is another type of standard Sudoku. Mini Sudoku can be used as entry-level practices for children and elementary students. It is more convenient for kids to handle basic rules and strategies of Sudoku games.

Mini Sudoku puzzles on Sudoku.cool have three sizes of "4x4, 6x6 and 8x8" with five difficulty levels. By pressing "new game", you can choose game size and difficulty level.

If you think that all Mini Sudoku puzzles are very easy, then you are wrong. Most of mini Sudoku puzzles provided by Sudoku.cool are very challenging.

Rules of Mini Sudoku

The solving process of Mini Sudoku is to fill numbers from 1-N in NxN grids. Numbers cannot be repetitive in each row, each column, each group (2x2, 2x3 and 2x4 grids in rough-line boxes).