X-Sum - Cross Sum Puzzle

Sharpen your mind with X-Sum - Cross Sum Puzzle, a clean and satisfying number puzzle built around logic and deduction.

Fill each grid with the numbers 1 to n so that every row and column contains each number exactly once. The clues around the grid show the X-Sum: the sum of the first x numbers seen from that side, where the first number tells you how many numbers to count.

It starts simple, then quickly becomes a rewarding logic challenge with smart deductions and satisfying breakthroughs.

Features:
- Pure logic gameplay
- Easy to learn, tricky to master
- Clean and readable interface
- Multiple difficulty levels

Great for quick sessions or longer puzzle solving
Designed for thoughtful, relaxing play

If you enjoy number puzzles, brain teasers, and logic games, X-Sum - Cross Sum Puzzle delivers a fresh twist with a simple rule and deep gameplay.