Samurai SuDoku, Killer Sudoku and more

I’m pleased to announce something new on this site – user contributed posts and puzzles here, on the main site (instead of in the forum).

mikejapan will be the first contributor, since he’s been most creative in the forum (although he’s made a break, but now he’s back).
Mike will start with his latest post from the forum, so we’re moving that discussion here.

I’ll be glad to add more users as we go on. Hope you’ll enjoy this!