Logic Masters Deutschland e.V.

Standard sudoku rules applies. Fill the grid with numbers from 1 to 6 so each digit occurs exactly once in every row, column and 2x3 box.

Outside digit is the filling sandwiched between two visible skyscraper in the clue direction. Not all possible digit is given.

Some explanation might be needed. Think of the outside digit as the filling, the skyscraper as bread. A sandwich is a single filling between 2 bread. So a negative restraint should look like this 14 I 213546 I X (not in this one, however)

These puzzles are made by Old Miles from China. There’s going to be a burst of puzzles, mainly 6X6 arrows, supposed I would see the seventh puzzle.

As for this idea, I’m looking at sandwich variant. I need a way to break the fix bread curse. One of them is using different bread from both side, as showcase in this one and first 6 min and max. Another possibility is that using symbols, dots vs or min and max two digit sum instead of digits as bread. The other way is add thickness, which might comes later. It might become a series. But let the arrow fly first, then taste the sandwich.

comment 2022: i forgot. may be parity as thickness. how many ideas do i have?