DualSum Sudoku is not just another puzzle — it’s a new frontier of logic gaming.
It fuses the elegance of Sudoku, the arithmetic crunch of Kakuro, and the positional depth of Nonograms into one beautifully demanding challenge.

It looks like Sudoku.
It feels like Sudoku.
But the truth is — every number you place is bound by hidden sums that transform the board into a multi-layered web of logic and arithmetic.

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🧩 HOW IT WORKS
• You play on a standard 9×9 Sudoku grid.
• All classic Sudoku rules apply: digits 1–9 must appear once in every row, column, and 3×3 box.

The twist:
• Rows and columns are split into hidden segments.
• Each segment has a sum clue, like in Kakuro.
• Clues are displayed beside rows and above columns — reminiscent of Nonograms.
• You don’t know where the segment starts or ends — only its total sum and the maximum number of segments per line.

That means:
🔒 Hidden partitions — you must deduce each segment’s boundaries.
📏 Flexible lengths — segments can vary, but must stay contiguous.
🔗 Double binding — every cell belongs to both a horizontal and a vertical sum.

Every move must satisfy three logics at once: Sudoku, arithmetic, and geometry.

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🔍 LOGIC REQUIRED
Solving requires techniques drawn from three puzzle worlds:

➕ Arithmetic Deduction (Kakuro style)
• Test combinations that satisfy each clue sum.
• Use length constraints to eliminate impossible sets.
• Discover forced totals (e.g., “24 in 3 cells = 7, 8, 9”).

📐 Spatial Reasoning (Nonogram style)
• Infer segment borders through overlaps and logic, not guesswork.
• Visualize invisible partitions and fill them with certainty.

🔢 Classic Sudoku Logic
• Apply familiar techniques — elimination, singles, scanning.
• But remember: every placement echoes across two intersecting sums.

🎯 Cross-Constraint Thinking
• Each number solves two equations at once — one horizontal, one vertical.
• A single misstep reverberates through the entire puzzle.

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✨ WHY IT’S DIFFERENT
• No cages. No pencil-mark gimmicks. Just pure deduction.
• Every clue is alive — hidden sums silently govern the board.
• Each solution feels like unveiling a puzzle within a puzzle.
• Once you see the pattern, every “aha!” moment is unforgettable.

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👤 WHO WILL LOVE IT
If you enjoy:
🧠 Sudoku — but crave something richer.
➕ Kakuro — but want logic beyond arithmetic.
📐 Nonograms — but prefer numeric elegance.

…then DualSum Sudoku will become your next obsession.

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🚀 WHY PLAY
✔ Sharpen your mind with deep logical reasoning.
✔ Experience puzzles that feel fresh yet familiar.
✔ Challenge yourself with layered, elegant design.
✔ Enjoy a calm, ad-free, offline experience built for purists and innovators alike.

👉 DualSum Sudoku isn’t just about solving puzzles.
It’s about thinking in multiple dimensions — where every move matters twice.

Are you ready to see Sudoku from a whole new angle?