Just release a new verision of AllSudoku.com where you can email a game in progress to a friend. It sends it as an HTML email showing the board as well as provides a link to go to AllSudoku.com and play the game.
| 6 | | | 2 | | 7 | | | 4 |
| | | 8 | | | | 2 | | |
| 2 | 7 | | | 1 | | | 5 | 9 |
| | | 7 | 6 | | 5 | 4 | | |
| | | | | 4 | | | | |
| | | 3 | 1 | | 8 | 9 | | |
| 4 | 5 | | | 3 | | | 9 | 6 |
| | | 6 | | | | 5 | | |
| 3 | | | 4 | | 6 | | | 1 |
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