I'd like to congratulate you on this Masyu construction feat, where not only are the givens arranged with 180-degree rotational symmetry (as has been seen in some of my own submissions, as well), but every given is symmetrically opposite a given of the opposite color. I have seen multiple Masyu puzzles with this property in Nikoli's publications, but never made one; I shall have to try harder. *laughs*
Edit: I did it! Expect a new awesome Masyu in the vestibule soon!
Joined: 04/03/2008 05:04:39
Thanks, Bram and I actually got into a race for this (my first version of this puzzle unfortunately had duplicate solutions, the result of me erasing previous circles (and not all lines) on the same grid. I ended up beating him by a matter of hours; it was quite tricky to make!