Daily Ranking Game
One official puzzle. Final results and the winning Su-Pu appear after the event closes.
Every solve tells a story
The latest finalized ranking result becomes a playable Su-Pu (数谱) — move by move. Study the winner, then try today’s competition yourself.
Replay the solve — not just the answer.
Latest finalized event · One featured replay · Exact result
Featured Su-Pu
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Today on Orbace
One official puzzle. Final results and the winning Su-Pu appear after the event closes.
A relaxed daily Sudoku when you want a quieter two-minute ritual.
Why Su-Pu
Every completed Orbace puzzle produces a Scorecard. Eligible personal solves can also be preserved as Su-Pu. Together, they show both the result and the reasoning behind it.
The Scorecard summarizes difficulty, time, mistakes, hints, steps, bonuses, and Puzzle Score. Its transparent breakdown shows where the result came from.
Su-Pu records the sequence of an eligible personal solve. Replay the moment the grid opened, examine a correction, or compare one logical route with another.
Move-by-move replay · Hard · Clean
Choose your experience
Personal play and official competition remain distinct. You decide when a puzzle should remain a quiet record and when your skill is ready for shared rules and public standing.
Play at your own pace, use learning tools, receive a Scorecard, and preserve eligible solves as Su-Pu.
Official competition runs on server-recorded attempts and results, scored under published event rules. Your personal Puzzle Score never affects official Ranking Points — the two stay entirely separate.
From one solve to lasting progress
The Scorecard rewards completion. Su-Pu preserves reasoning. Learning turns reflection into skill, and official competition gives that skill a clear test.
Begin with one quiet daily puzzle and receive a clear result.
Play today →Study real turning points through technique practice and articles.
Learn from solves →Practice by difficulty, strategy, or the kind of thinking you want.
Choose a pack →Replay how a solve unfolded and reflect on the reasoning before you compete.
Browse Su-Pu →Bring growing skill into official Daily Ranking Game, Weekly Cup, and Grand Tournament competition.
Enter official play →Orbace Global Ranking
Official standing comes from eligible, finalized competition results under Orbace's published rules — not from personal Puzzle Score. Live standings are provisional until each event closes and results are verified.
Learn from real solves
Technique practice packs and articles reconstruct interesting solves and explain the move that changed the grid.
Why ibtree's pencil digits trace a trial solution forward, not every possible candidate in every cell.
Orbace Technologies LLC
Orbace Sudoku is developed and published by Orbace Technologies LLC in Troy, Michigan. We build technology around a human principle: it should support the way people want to live without continually demanding more attention.