The clues outside the grid relate to the binary representation of the numbers inside the grid (1 = 0001, 2 = 0010, 3 = 0011, etc.) and show the sum of ones of those binary numbers within the clue.
Thus the sandwich clues above the columns and to the left of the row indicate the sum of (binary) ones inbetween the numbers 1 and 9 and the little killer clues indicate the sum of ones along the diagonal´which the arrow points at.
Solution code: row 1 and column 7 without separators
on 22. April 2020, 13:36 by Dandelo
Ich fand es auch schön. Der Name irritiert mich etwas, binary (oder dual) statt digital hätte ich naheliegender gefunden, aber die Idee ist gut.
on 22. April 2020, 13:22 by Xenyos
Wow, I am amazed by all your positive feedback on my first puzzle! I didn't expect that. I have some more sudokus "under construction" and I am well encouraged to finish them, now.
on 22. April 2020, 12:59 by skywalker
Nice one and not too hard. Waiting for your next contribution!!
on 22. April 2020, 08:44 by Statistica
Witzige Idee. Und nicht schwierig.
on 20. April 2020, 18:35 by Xenyos
Thanks, Nylimb
on 20. April 2020, 17:44 by Nylimb
Nice variant.
on 20. April 2020, 17:33 by Xenyos
thanks, I am happy that you liked it
on 20. April 2020, 17:22 by marcmees
very nice sandwich variation. thx
on 20. April 2020, 16:24 by Xenyos
Danke für das Feedback, ist mein erstes Sudoku ^^
on 20. April 2020, 16:15 by ch1983
Hat Spaß gemacht, vielen Dank.