Sudoku Solver (Odin + Raylib)

A learning project built with Odin and Raylib 6.

Goals

• Interactive 9×9 Sudoku grid with keyboard + mouse navigation
• Ability to enter and clear numbers
• A working backtracking solver
• "Unsolve" support so you can create and share puzzles
• Clean, readable code as a learning exercise in Odin

Current Status

• Grid rendering with light/dark theme
• Cell selection (mouse + arrows + hjkl + Tab block jumping)
• Basic number input (still needs a persistent board)
• Project structured with small packages (vecs, etc.)

Building

odin run src

Controls (so far)

Input	Action
Mouse click	Select cell
Arrow keys / hjkl	Move selection
Tab / Shift+Tab	Jump to next/previous 3×3 block
1-9	Enter number (temporary)
Backspace / Delete	Clear cell (temporary)
Space	Toggle light/dark theme

Roadmap

1. Persistent board state ([9][9]int)
2. Proper number drawing
3. Solve button + backtracking solver
4. Unsolve / restore original puzzle
5. Optional undo stack
6. Polish + keyboard shortcuts

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Learning project – code is intentionally kept simple and readable.