The tree has ornaments (dots) of several colors. If a pentomino contains a green dot, it is a Germanimo: adjacent pairs of digits inside it differ by at least 5. If it contains a red dot, it is a Renbanimo: it contains 5 consecutive digits.
Black, white, and silver dots show a boundary between two pentominoes. Black means their totals are in a 1:2 ratio. White means their totals differ by one. Silver means their totals are equal.
Digits increase upward in a candle (i.e. a thermometer). Oh—and normal Sudoku rules apply!
Solution code: Row 1 and then column 1
on 6. January 2024, 07:32 by cristophermoore
added that normal Sudoku rules apply :-)
on 24. December 2023, 16:32 by Blobz
Tricky, but very enjoyable. Nicely constructed puzzle!
on 22. December 2023, 16:25 by Snookerfan
Excellent! Thank you
on 19. December 2023, 03:36 by Nylimb
Very nice combination of rules! Thanks.