Hi,
For each case, there is a solution: participate in TFOSCAWSC (The First Online Sudoku Competition After WSC).
The tournament is open from Saturday 8th May at 00:00 to Sunday 9th May at 24:00 (GMT+2h).
The duration is 2 hours, you can start when you want.
I'm the author, grids were tested by Ours brun, Rakesh Rai, and Doukkali.
It'll take place at a french forum: http://sudokuvariante.forumactif.com/
A topic is dedicated for that tournament: http://sudokuvariante.forumactif.com/tournois-internes-f4/tournoi-du-for...
The booklet is already posted, you can see and download it here: https://docs.google.com/fileview?id=0B5Ap3wAprN3oZmVhY2QwYTAtZWZkNS00ODk...
Hope you'll participate and enjoy it !
Fred