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.
The digit(s) at the end of the the arrows marks the digit (s) that appears more than once on the arrow. In other words, all clues outside appear more than once on the arrow pointed at them. X means none, every digit is single on the arrow.
All possible clues on the arrows are given. So only the clues outside can be repeated on the arrows.
One is enough, unless you guys want another one.
This puzzle is made by Old Miles from China. I think this one is from March. Time to clear my stock Old Miles puzzles. I don't know if you want to brute force this one, because I think this one is just not that satisfying to use that trick. Since you guys already know fish, the trick named for all tricks concerning single type of digit, this one should be a walk in the park. I'm kind of hesitate to say this, because I'm not known for fish. But I kind of feel the basic. So Good luck.
Solution code: Row 3 and column 3 (12 digits)
on 5. August 2021, 13:19 by uvo_mod
Label "Klein" ergänzt.