Stars and Arrows
The origin of this puzzle is not known.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid containing some arrows. There are number clues to the top and left.
The goal is to place stars in empty cells to satisfy the clues.
The solved grid must satisfy the following conditions:
Each arrow points to exactly one star.
Each star has exactly one arrow pointing to it.
The numbers on the top and left indicate how many stars are in that rank.