LinkedIn Mini Sudoku #344

LinkedIn Mini Sudoku #344 is the LinkedIn Mini Sudoku daily for July 21, 2026. Mini Sudoku is LinkedIn's compact sudoku variant: fill a 6×6 grid so every row, column, and irregular region contains the digits 1 through 6 exactly once. This page includes the live board, a solved-board view, and a step-by-step Solution walkthrough. Difficulty: Easy. Estimated solve time: 3–5 min. Read the explainer sections below for strategy, or jump straight into play.

This 6×6 Mini Sudoku starts with 12 given digits and fills 24 remaining cells. Layout: 6 regions, 6 cells each.

R1C6=3, R2C6=2, R3C2=3, R4C5=1, R2C4=1, R5C1=2, R6C2=1, R6C3=3, R5C3=4, R5C4=6, R5C2=5, R4C2=6, R4C6=4, R3C6=6, R3C5=5, R2C5=6, R1C5=4, R1C4=5, R1C3=6, R2C3=5, R3C1=4, R4C1=5, R6C1=6, R6C4=4

1. Cell 1Sample 1Hidden single (row)

   R1C6 = 3

   Reasoning

   3 cannot go anywhere else in row 1 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R1C6 in region 2. A digit can only appear in one empty cell within its row.

2. Cell 2Sample 2Hidden single (row)

   R2C6 = 2

   Reasoning

   2 cannot go anywhere else in row 2 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R2C6 in region 2. A digit can only appear in one empty cell within its row.

3. Cell 3Sample 3Hidden single (row)

   R3C2 = 3

   Reasoning

   3 cannot go anywhere else in row 3 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R3C2 in region 3. A digit can only appear in one empty cell within its row.

4. Cell 4Sample 4Hidden single (row)

   R4C5 = 1

   Reasoning

   1 cannot go anywhere else in row 4 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R4C5 in region 4. A digit can only appear in one empty cell within its row.

5. Cell 5Sample 5Hidden single (row)

   R2C4 = 1

   Reasoning

   1 cannot go anywhere else in row 2 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R2C4 in region 2. A digit can only appear in one empty cell within its row.

6. Cell 6Sample 6Hidden single (row)

   R5C1 = 2

   Reasoning

   2 cannot go anywhere else in row 5 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R5C1 in region 5. A digit can only appear in one empty cell within its row.

7. Cell 7Sample 7Hidden single (row)

   R6C2 = 1

   Reasoning

   1 cannot go anywhere else in row 6 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R6C2 in region 5. A digit can only appear in one empty cell within its row.

8. Cell 8Sample 8Hidden single (row)

   R6C3 = 3

   Reasoning

   3 cannot go anywhere else in row 6 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (row) at R6C3 in region 5. A digit can only appear in one empty cell within its row.

9. Cell 9Sample 9Hidden single (column)

   R5C3 = 4

   Reasoning

   4 cannot go anywhere else in column 3 — every other empty cell is blocked by a row, column, or region clash.

   Solving note

   Hidden single (column) at R5C3 in region 5. A digit is forced to a single column position.

10. Cell 10Sample 10Naked single

    R5C4 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 5 and column 4 and region 6; 2 is already in row 5 and column 4 and region 6; 3 is already in row 5 and column 4 and region 6; 4 is already in row 5; 5 is already in region 6.

    Solving note

    Naked single at R5C4 in region 6. Only one digit fits this cell after row, column, and region eliminations.

11. Cell 11Sample 11Naked single

    R5C2 = 5

    Reasoning

    Only 5 fits here — 1 is already in row 5 and column 2 and region 5; 2 is already in row 5 and column 2 and region 5; 3 is already in row 5 and column 2 and region 5; 4 is already in row 5 and column 2 and region 5; 6 is already in row 5.

    Solving note

    Naked single at R5C2 in region 5. Only one digit fits this cell after row, column, and region eliminations.

12. Cell 12Sample 12Naked single

    R4C2 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 4 and column 2 and region 3; 2 is already in row 4 and column 2 and region 3; 3 is already in row 4 and column 2 and region 3; 4 is already in column 2; 5 is already in column 2.

    Solving note

    Naked single at R4C2 in region 3. Only one digit fits this cell after row, column, and region eliminations.

13. Cell 13Sample 13Naked single

    R4C6 = 4

    Reasoning

    Only 4 fits here — 1 is already in row 4 and column 6 and region 4; 2 is already in row 4 and column 6 and region 4; 3 is already in row 4 and column 6 and region 4; 5 is already in column 6; 6 is already in row 4.

    Solving note

    Naked single at R4C6 in region 4. Only one digit fits this cell after row, column, and region eliminations.

14. Cell 14Sample 14Naked single

    R3C6 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 3 and column 6 and region 4; 2 is already in row 3 and column 6 and region 4; 3 is already in row 3 and column 6 and region 4; 4 is already in column 6 and region 4; 5 is already in column 6.

    Solving note

    Naked single at R3C6 in region 4. Only one digit fits this cell after row, column, and region eliminations.

15. Cell 15Sample 15Naked single

    R3C5 = 5

    Reasoning

    Only 5 fits here — 1 is already in row 3 and column 5 and region 4; 2 is already in row 3 and column 5 and region 4; 3 is already in row 3 and column 5 and region 4; 4 is already in region 4; 6 is already in row 3 and region 4.

    Solving note

    Naked single at R3C5 in region 4. Only one digit fits this cell after row, column, and region eliminations.

16. Cell 16Sample 16Naked single

    R2C5 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 2 and column 5 and region 2; 2 is already in row 2 and column 5 and region 2; 3 is already in row 2 and column 5 and region 2; 4 is already in row 2; 5 is already in column 5.

    Solving note

    Naked single at R2C5 in region 2. Only one digit fits this cell after row, column, and region eliminations.

17. Cell 17Sample 17Naked single

    R1C5 = 4

    Reasoning

    Only 4 fits here — 1 is already in row 1 and column 5 and region 2; 2 is already in row 1 and column 5 and region 2; 3 is already in row 1 and column 5 and region 2; 5 is already in column 5; 6 is already in column 5 and region 2.

    Solving note

    Naked single at R1C5 in region 2. Only one digit fits this cell after row, column, and region eliminations.

18. Cell 18Sample 18Naked single

    R1C4 = 5

    Reasoning

    Only 5 fits here — 1 is already in row 1 and column 4 and region 2; 2 is already in row 1 and column 4 and region 2; 3 is already in row 1 and column 4 and region 2; 4 is already in row 1 and region 2; 6 is already in column 4 and region 2.

    Solving note

    Naked single at R1C4 in region 2. Only one digit fits this cell after row, column, and region eliminations.

19. Cell 19Sample 19Naked single

    R1C3 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 1 and column 3 and region 1; 2 is already in row 1 and column 3 and region 1; 3 is already in row 1 and column 3 and region 1; 4 is already in row 1 and column 3 and region 1; 5 is already in row 1.

    Solving note

    Naked single at R1C3 in region 1. Only one digit fits this cell after row, column, and region eliminations.

20. Cell 20Sample 20Naked single

    R2C3 = 5

    Reasoning

    Only 5 fits here — 1 is already in row 2 and column 3 and region 1; 2 is already in row 2 and column 3 and region 1; 3 is already in row 2 and column 3 and region 1; 4 is already in row 2 and column 3 and region 1; 6 is already in row 2 and column 3 and region 1.

    Solving note

    Naked single at R2C3 in region 1. Only one digit fits this cell after row, column, and region eliminations.

21. Cell 21Sample 21Naked single

    R3C1 = 4

    Reasoning

    Only 4 fits here — 1 is already in row 3 and column 1 and region 3; 2 is already in row 3 and column 1 and region 3; 3 is already in row 3 and column 1 and region 3; 5 is already in row 3; 6 is already in row 3 and region 3.

    Solving note

    Naked single at R3C1 in region 3. Only one digit fits this cell after row, column, and region eliminations.

22. Cell 22Sample 22Naked single

    R4C1 = 5

    Reasoning

    Only 5 fits here — 1 is already in row 4 and column 1 and region 3; 2 is already in row 4 and column 1 and region 3; 3 is already in row 4 and column 1 and region 3; 4 is already in row 4 and column 1 and region 3; 6 is already in row 4 and region 3.

    Solving note

    Naked single at R4C1 in region 3. Only one digit fits this cell after row, column, and region eliminations.

23. Cell 23Sample 23Naked single

    R6C1 = 6

    Reasoning

    Only 6 fits here — 1 is already in row 6 and column 1 and region 5; 2 is already in row 6 and column 1 and region 5; 3 is already in row 6 and column 1 and region 5; 4 is already in column 1 and region 5; 5 is already in row 6 and column 1 and region 5.

    Solving note

    Naked single at R6C1 in region 5. Only one digit fits this cell after row, column, and region eliminations.

24. Cell 24Sample 24Naked single

    R6C4 = 4

    Reasoning

    Only 4 fits here — 1 is already in row 6 and column 4 and region 6; 2 is already in row 6 and column 4 and region 6; 3 is already in row 6 and column 4 and region 6; 5 is already in row 6 and column 4 and region 6; 6 is already in row 6 and column 4 and region 6.

    Solving note

    Naked single at R6C4 in region 6. Only one digit fits this cell after row, column, and region eliminations.

Optimal deduction chain length 24. Technique distribution: 15× Naked single, 8× Hidden single (row), 1× Hidden single (column). Pattern: hidden-single chain.

Every row, column, and region contains digits 1–6 with no repeats.

Phase 1: 12 given digits on a 6×6 board with 6 irregular regions — fill every row, column, and region with 1–6 exactly once. Step 1: R1C6 = 3 (hidden single (row)). 3 cannot go anywhere else in row 1 — every other empty cell is blocked by a row, column, or region clash. Step 2: R2C6 = 2 (hidden single (row)). 2 cannot go anywhere else in row 2 — every other empty cell is blocked by a row, column, or region clash. Step 3: R3C2 = 3 (hidden single (row)). 3 cannot go anywhere else in row 3 — every other empty cell is blocked by a row, column, or region clash. Step 4: R4C5 = 1 (hidden single (row)). 1 cannot go anywhere else in row 4 — every other empty cell is blocked by a row, column, or region clash. Step 5: R2C4 = 1 (hidden single (row)). 1 cannot go anywhere else in row 2 — every other empty cell is blocked by a row, column, or region clash. Step 6: R5C1 = 2 (hidden single (row)). 2 cannot go anywhere else in row 5 — every other empty cell is blocked by a row, column, or region clash. Step 7: R6C2 = 1 (hidden single (row)). 1 cannot go anywhere else in row 6 — every other empty cell is blocked by a row, column, or region clash. Step 8: R6C3 = 3 (hidden single (row)). 3 cannot go anywhere else in row 6 — every other empty cell is blocked by a row, column, or region clash. Step 9: R5C3 = 4 (hidden single (column)). 4 cannot go anywhere else in column 3 — every other empty cell is blocked by a row, column, or region clash. Step 10: R5C4 = 6 (naked single). Only 6 fits here — 1 is already in row 5 and column 4 and region 6; 2 is already in row 5 and column 4 and region 6; 3 is already in row 5 and column 4 and region 6; 4 is already in row 5; 5 is already in region 6. Step 11: R5C2 = 5 (naked single). Only 5 fits here — 1 is already in row 5 and column 2 and region 5; 2 is already in row 5 and column 2 and region 5; 3 is already in row 5 and column 2 and region 5; 4 is already in row 5 and column 2 and region 5; 6 is already in row 5. Step 12: R4C2 = 6 (naked single). Only 6 fits here — 1 is already in row 4 and column 2 and region 3; 2 is already in row 4 and column 2 and region 3; 3 is already in row 4 and column 2 and region 3; 4 is already in column 2; 5 is already in column 2. Step 13: R4C6 = 4 (naked single). Only 4 fits here — 1 is already in row 4 and column 6 and region 4; 2 is already in row 4 and column 6 and region 4; 3 is already in row 4 and column 6 and region 4; 5 is already in column 6; 6 is already in row 4. Step 14: R3C6 = 6 (naked single). Only 6 fits here — 1 is already in row 3 and column 6 and region 4; 2 is already in row 3 and column 6 and region 4; 3 is already in row 3 and column 6 and region 4; 4 is already in column 6 and region 4; 5 is already in column 6. Step 15: R3C5 = 5 (naked single). Only 5 fits here — 1 is already in row 3 and column 5 and region 4; 2 is already in row 3 and column 5 and region 4; 3 is already in row 3 and column 5 and region 4; 4 is already in region 4; 6 is already in row 3 and region 4. Step 16: R2C5 = 6 (naked single). Only 6 fits here — 1 is already in row 2 and column 5 and region 2; 2 is already in row 2 and column 5 and region 2; 3 is already in row 2 and column 5 and region 2; 4 is already in row 2; 5 is already in column 5. Step 17: R1C5 = 4 (naked single). Only 4 fits here — 1 is already in row 1 and column 5 and region 2; 2 is already in row 1 and column 5 and region 2; 3 is already in row 1 and column 5 and region 2; 5 is already in column 5; 6 is already in column 5 and region 2. Step 18: R1C4 = 5 (naked single). Only 5 fits here — 1 is already in row 1 and column 4 and region 2; 2 is already in row 1 and column 4 and region 2; 3 is already in row 1 and column 4 and region 2; 4 is already in row 1 and region 2; 6 is already in column 4 and region 2. Step 19: R1C3 = 6 (naked single). Only 6 fits here — 1 is already in row 1 and column 3 and region 1; 2 is already in row 1 and column 3 and region 1; 3 is already in row 1 and column 3 and region 1; 4 is already in row 1 and column 3 and region 1; 5 is already in row 1. Step 20: R2C3 = 5 (naked single). Only 5 fits here — 1 is already in row 2 and column 3 and region 1; 2 is already in row 2 and column 3 and region 1; 3 is already in row 2 and column 3 and region 1; 4 is already in row 2 and column 3 and region 1; 6 is already in row 2 and column 3 and region 1. Step 21: R3C1 = 4 (naked single). Only 4 fits here — 1 is already in row 3 and column 1 and region 3; 2 is already in row 3 and column 1 and region 3; 3 is already in row 3 and column 1 and region 3; 5 is already in row 3; 6 is already in row 3 and region 3. Step 22: R4C1 = 5 (naked single). Only 5 fits here — 1 is already in row 4 and column 1 and region 3; 2 is already in row 4 and column 1 and region 3; 3 is already in row 4 and column 1 and region 3; 4 is already in row 4 and column 1 and region 3; 6 is already in row 4 and region 3. Step 23: R6C1 = 6 (naked single). Only 6 fits here — 1 is already in row 6 and column 1 and region 5; 2 is already in row 6 and column 1 and region 5; 3 is already in row 6 and column 1 and region 5; 4 is already in column 1 and region 5; 5 is already in row 6 and column 1 and region 5. Step 24: R6C4 = 4 (naked single). Only 4 fits here — 1 is already in row 6 and column 4 and region 6; 2 is already in row 6 and column 4 and region 6; 3 is already in row 6 and column 4 and region 6; 5 is already in row 6 and column 4 and region 6; 6 is already in row 6 and column 4 and region 6. Complete: Every row, column, and region contains digits 1–6 with no repeats.

Digits keep appearing as the only option left in a row, column, or region — follow those hidden singles in sequence.

Techniques: 15× Naked single, 8× Hidden single (row), 1× Hidden single (column)

This Mini Sudoku board is 6×6 with 6 regions, 6 cells each and 12 given digits. Unlike classic 9×9 sudoku, the shaded regions here are irregular shapes that overlap rows and columns, so each placement affects multiple groups at once. Every row, column, and region must contain 1 through 6 with no repeats — the hint engine uses naked singles and hidden singles to walk through 24 remaining cells. Digits keep appearing as the only option left in a row, column, or region — follow those hidden singles in sequence. Solve order (hint-driven): R1C6=3, R2C6=2, R3C2=3, R4C5=1, R2C4=1, R5C1=2, R6C2=1, R6C3=3, R5C3=4, R5C4=6, R5C2=5, R4C2=6, R4C6=4, R3C6=6, R3C5=5, R2C5=6, R1C5=4, R1C4=5, R1C3=6, R2C3=5, R3C1=4, R4C1=5, R6C1=6, R6C4=4. Use the Solution tab for a cell-by-cell walkthrough with live grid updates, or the Solved board tab for the complete grid at a glance.