Edit:
Moso reminded me where I saw it before
http://sudokuvariante.forumactif.com/Tournoi-du-forum-h10.htm
The outside clues indicate the first even and/or odd digit found in the row/column
Edit:
Moso reminded me where I saw it before
http://sudokuvariante.forumactif.com/Tournoi-du-forum-h10.htm
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