Logic Masters Deutschland e.V.

On 22/1/2026 I watched the SudokuCon Battle of the Setters between dumediat and sfushidahardy. Totally enjoyed it and afterwards I took their dragon shape and created this puzzle. Over the next few months I could not find any completion of their dragon shape puzzle. So 227 days later I think its time to give recognition to their incredible dragon shape from my perspective.

Normal Sudoku Rules apply.
For accessibility, lines have been marked with an abbreviation to distinguish them as an alternative to the line's colour.
Dragon:
Box borders divide the blue Region Sum [RS] lines, where digits on any of the lines in each box, have the same sum.
Adjacent digits along an orange Dutch Whisper [DW] line must differ by at least 4.
Adjacent digits along a red Parity [PR] line, one digit is odd and the other digit is even.
Cells connected by a pink Renban [R1] or a purple Renban [R2] line, form a set of consecutive digits, in any order, without repeats. Both Renban lines are separate even though they share the R4C4 digit.
Fortresses:
Numbers in a Maximum grey cell with arrows pointing outwards are greater than all orthogonally adjacent non-maximum cells.
Tunnels:
Killer cages, indicated by dotted lines, cannot have repeated digits and the digits in the cage sum to the total if shown in the top-left corner.
Other:
Digits in cells joined by an X sum to 10. Digits in cells joined by an V sum to 5.
Digits in cells joined by a white dot are consecutive.
Not all Xs, Vs or dots are necessarily given.

Solve with SudokuPad

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Hope you enjoy it. Feel free to give feedback.

Thanks

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