Numerical Alchemist

Numerical Alchemist is a number-placement logic puzzle played on a 9x9 Sudoku grid. You fill the grid using standard Sudoku rules for rows, columns and 3x3 blocks, along with eight original constraints. Each puzzle is designed to be solved through deduction from the information on the board, without assumptions or guesswork.

Numerical constraints

The constraints include adjacent sums, greater-than and less-than relationships, parity matching, multiples and divisors, and local area structures. Each can be used on its own, while overlapping constraints create further lines of reasoning. The aim is to find the point where the rules intersect and determine the solution.

Story mode

You play as an alchemist reading truths hidden in numbers, clearing stages across multiple chapters. The puzzles grow more complex as you progress, and you earn titles and achievement records. Story mode arranges stages by difficulty in a quiet, minimalist setting where each move matters.

Puzzle tools

Pencil marks, undo and redo, input aids and error checking support your solving. The controls and readability are designed to help you focus on complex boards.

Create and share puzzles

You can create custom puzzles by placing the original constraints, then publish them for other players to solve. You can also tackle difficult puzzles made by the community.