This genre has a nice name. Creator's time: 1:38.0 Rules: Standard Landvermessung Rules \ Shade some cells such that no closed loops exist among the shaded cells (not even a 2x2). A clue indicates the number of cells in the shortest path of shaded cells that visits all of those touched by the clue. An infinity (∞) clue indicates that no such path exists. Difficulty : 5.5/14 Online interface (Penpa+)
This puzzle was inspired by the Geometry Dash level LIMEADE by AudieoVisual. And yes, the difficulty can do that. But I'll just round down for tag purposes. Creator's time: 13:58 Rules: Normal 9x9 Sudoku rules apply. Variant: Lemons \ Digits around the edge of a lime or lemon must sum to the total given in the two-digit number in the center of the lime or lemon (read left-to-right or top-to-bottom); digits may repeat on the same shape if allowed by other rules. LMD link: https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000UF9 Difficulty : 8.5/14 Online interface (SudokuPad)