### Newdoku

### How to play

### Rules

### How to print

### Solution

### Classic Sudoku

### X-Sudoku

Get the only solution to the newdoku puzzles by thinking logically without guessing.

In a 3x3 grid, use the number 1-3.

In a 4x4 grid, use the number 1-4, and so on.

In a 9x9 grid, use the number 1-9.。

Numbers in the cells of each cage must produce a certain "target" number when combined using a specified math operation (+,-,×, or ÷). A cage with one square is a "Freebie". Fill in the number you're given.