Mathrax for iOS

Mathrax is a logic puzzle. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle's side. No number may appear twice in any row or column. Circles with additional conditions may appear on intersections of lines inside the grid.- A number and a sign of mathematical operation (addition, subtraction, multiplication, division) - a number is a result of an operation execution with numbers in diagonally adjacent cells.- A letter "E" ("even") - all numbers in four cells are even.- A letter "O" ("odd") - all numbers in four cells are odd.**** Mathrax features ****- 6 different sizes of board- 5 difficulty levels- more than 500 levels- Highlight wrong number automatically- Autosave the process of unfinished levels- Record best completion time for each level- Game Center Achievements- Try to complete as many levels as possible