This puzzle was developed by Elliott Line.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid. Some cells contain numbers.
The goal is to put a different integer in each cells (from 1 to N, where N is the count of empty cells in the grid), to satisfy the clues.
The solved grid must satisfy the following conditions:
Each even number must be in the same rank as its one-less odd.
Each odd number must be in the same diagonal as its one-less even.
The number clues show the sum of the orthogonally neighboring non-clue cells.