Sudoku variant 8: Wordoku Sudoku

Welcome to Wordoku! Replace digits 1–9 with 9 unique letters forming a word. Same rules — each row, column, and 3×3 box must contain all 9 letters. Solve the puzzle to reveal the hidden word!

🔤 Wordoku — Letters Instead of Numbers

💡 Each row, column, and 3×3 box contains all 9 letters. A new word every game!

🔤 Today's Word:

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# What Is Wordoku? Digits 1–9 replaced by 9 unique letters. If you can solve standard sudoku, you can solve Wordoku — letters are more memorable than numbers!

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🔄 Sudoku Variants — Complete Collection

✅ #1: Killer Sudoku ✅ #2: Diagonal Sudoku X ✅ #3: Samurai Sudoku ✅ #4: Addition Sudoku ✅ #5: Odd/Even Sudoku ✅ #6: Greater Than Sudoku ✅ #7: Jigsaw Sudoku ✅ #8: Wordoku

Sudoku Variant 7: Jigsaw Sudoku

Welcome to Jigsaw Sudoku! Standard rows and columns remain, but the 3×3 boxes are replaced by irregularly-shaped colored regions of 9 cells each. Every region must contain digits 1–9. These curvy shapes break your habitual scanning patterns!

🧩 Jigsaw Sudoku — Irregular Regions

💡 Colored regions replace 3×3 boxes. Each region = 9 cells with digits 1–9, no repeats.

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# What Is Jigsaw Sudoku? Irregular regions replace 3×3 boxes. The Law of Leftovers is a powerful Jigsaw technique: cells "left over" when a row crosses a region boundary must contain the same set as cells "left over" outside.

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Sudoku Viriant 6: Greater Than Sudoku

Welcome to Greater Than Sudoku! Inequality signs between cells indicate which is larger. Use chains like A>B>C to narrow candidates — if 3 cells are in descending order, the largest must be ≥3 and the smallest ≤7.

📏 Greater Than Sudoku — Follow the Arrows

💡 Inequality signs (> <) between cells show which digit is larger. No arithmetic — pure comparison!

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# What Is Greater Than Sudoku? Inequality signs between cells replace some given numbers. Transitive chains like A>B>C>D can force the largest cell to ≥4 and the smallest to ≤6!

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Sudoku Variant 5: Odd Even Sudoku

Welcome to Odd/Even Sudoku! Shaded cells = odd digits only (1,3,5,7,9). White cells = any digit. Parity eliminates 4 candidates per shaded cell instantly!

🔲 Odd/Even Sudoku — Shaded = Odd Only

💡 Gray cells = odd digits (1,3,5,7,9). White = any digit 1–9.

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# What Is Odd/Even Sudoku? Shaded cells accept only odd digits. A row with 5 odd-only cells + 2 given odds = 7 cells forced odd — the remaining 2 MUST be even!

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Sudoku Variant 4: Addition Sudoku

Welcome to Addition Sudoku! Small numbers at 2×2 intersections equal the sum of the four surrounding cells. Standard rules + sum constraints.

➕ Addition Sudoku — 2×2 Corner Sums

💡 Numbers at grid intersections = sum of 4 surrounding cells.

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# What Is Addition Sudoku? Sum markers at 2×2 intersections constrain four cells. A sum of 10 with 4 distinct digits forces {1,2,3,4} — use these to eliminate candidates!

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Sudoku Variant 3: Samurai Sudoku

Welcome to Samurai Sudoku — 5 overlapping 9×9 grids in an X formation! Each grid follows standard rules. Overlapping cells (shared 3×3 boxes) must satisfy ALL grids they belong to.

🔗 Samurai Sudoku — 5 Grids, 21×21

💡 5 interlocking 9×9 grids. Overlapping zones (dark) belong to 2 grids. Solve corners first!

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# What Is Samurai Sudoku?

5 standard grids overlap in an X formation. Each shares a 3×3 box with the center grid. Solve corner grids first — they're most independent — then use overlap cells to bridge into the center.

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Sudoku Variant 2: Diagonal Sudoku

Welcome to Diagonal Sudoku (Sudoku X)! In addition to rows, columns, and 3×3 boxes, both main diagonals must contain digits 1–9 with no repeats. Cells on diagonals are highlighted.

📐 Diagonal Sudoku — Both Diagonals 1–9

💡 Highlighted cells are on diagonals. Both main diagonals must contain all digits 1–9.

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# What Is Diagonal Sudoku?

Diagonal Sudoku (Sudoku X) adds one rule: both main diagonals must contain 1–9 with no repeats. Diagonal cells (highlighted pink) are constrained by row + column + box + diagonal — the center cell sits on BOTH diagonals!

🧠 Pro Tip: Start with the center cell (r5c5) — it's on both diagonals and is the most constrained cell on the board.

Tags: diagonal sudoku, sudoku X, sudoku variants, free sudoku, daily sudoku

Sudoku Variant 1: Killer Sudoku

Welcome to Killer Sudoku! Standard sudoku rules apply (each row, column, and 3×3 box contains digits 1–9). Plus each cage (dashed outline) has a target sum — digits inside must add up to that sum with NO repeats within the cage.

🔢 Killer Sudoku — Cages & Sums

💡 Cage sums shown in corners. Each row/col/box + each cage: digits 1–9, no repeats.

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# What Is Killer Sudoku?

Killer Sudoku combines standard sudoku rules with cage sum constraints. Each dashed cage has a target sum — all digits inside must add up to that sum with NO repeats within the cage. Some Killer puzzles give you zero starting numbers, only cage sums!

🧠 Key Strategy: Start with forced cages — sum of 3 in 2 cells = {1,2}, sum of 17 in 2 cells = {8,9}. These forced combinations unlock the entire grid.

# FAQ

Q: Can digits repeat within a cage?
A: No. Each cage has unique digits, same as rows/columns/boxes.

Q: What's the difference from regular sudoku?
A: Killer puzzles often have no given numbers — only cage sums. You deduce everything from the arithmetic.

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