For even more fun, don't hesitate to send an invitation to your friends to challenge them on this game.

Import your address book

You can import email addresses from your Yahoo, Hotmail, MSN, Live.com or Gmail address book.
Massive Sudoku will not store your email login or your password.
Gmail Hotmail Yahoo

Paste their email addresses

Enter your friends email here.
Separate them by comas, semi-colons, spaces or even line breaks.

Your email (required)