Logic Masters Deutschland e.V.

This is my response to Scojo's setting prompt for the week, as redeemed by LMDemasi, which was to make an "approachable doppelgänger". My first draft ended up being a little too difficult, but rather than adding clues to make that easier and take away some of its interesting steps, I just did what any sane setter would do and made a whole new puzzle over some lunch.



DOPPELGÄNGER:
• Fill each cell of the main grid such that every row, column and box contains a 0 and five different digits from 1-6;
• No two rows, no two columns and no two boxes may be missing the same digit;
• For each 0 in the grid, the digits missing in its row, column and box must be three different digits;
• Fill the external cells with the missing digit from the corresponding row, column or box.

ANTIKNIGHT:
• Cells separated by a Knight's move (in Chess) cannot contain the same digit.