Learn without guessing
Rules, scanning, candidates, and a dependable first solving method.
Original ideas for clearer play
Orbace Journal
A record of how Sudoku is solved, taught, and shaped. The Journal turns interesting games into substantial original lessons — giving players something useful to read before the next puzzle.
Latest articles
From the Journal.
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Explore the journal
Understand why it works
Formal patterns explained through real positions and useful eliminations.
What makes a grid satisfying?
Logical flow, validation, turning points, and thoughtful difficulty.
How the Journal is made
From a real solve to a useful lesson.
Select
Choose and verify a noteworthy solve.
Reconstruct
Rebuild the Su-Pu and draft the lesson.
Review
Check the logic against the playable position.
Publish
Release, link practice, and correct openly.