Sudoku Keychain (SUDOKU-KC-1)

AI-CHAIN Sudoku puzzle is suitable for players of all abilities and features include 3 levels of difficulty; Easy, hard and harder. Advance hint system to assist you by showing a step or complete in the solution of an unique Sudoku puzzle. Smart helper can help you sort out permissible number. Includes a puzzle creator which literally generates an endless supply of new and true Sudoku puzzles, all solvable by logic alone and a puzzle solver, so you can input any literal 9x9 Sudoku from a newspaper or book and AI-CHAIN Sudoku can show you the solution or give you hints to help you play along.

Features:
- Endless generate and supply literal 9x9 Sudoku puzzles.
- Minimum size 43x73x15mm.
- Keep a Sudoku into your pocket.
- Keychain hook or hanging hook.
- Built-in three levels, easy, hard and harder. Suit for any level people.
- User levels: Create your own Sudoku or input from newspaper or book.
- Integrated Sudoku solver. Can solve million true unique Sudoku.
- Advance hint system: Provides a step solution, error location or solve completely.
- Save and load up to 2 games.
- Count up or Count down in minute.
- Count up or Count error input.
- Clock and Alarm.
- includes 1xCR2032 battery
- free download PC sudoku