8
6
2
6
2
7
2
9
6
5
6
6
4
9
8
1
2
6
4
5
9
6
4
6
6
3
7

This Sudoku Puzzle has 17 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Pair, Empty Rectangle, Finned Swordfish, Sue de Coq, Give Up techniques.

Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 4 → 2 (Hidden Single)
  2. Row 4 / Column 6 → 4 (Hidden Single)
  3. Row 8 / Column 6 → 6 (Hidden Single)
  4. Row 2 / Column 9 → 6 (Hidden Single)
  5. Row 1 / Column 4 → 6 (Hidden Single)
  6. Row 5 / Column 8 → 6 (Hidden Single)
  7. Row 6 / Column 2 → 6 (Hidden Single)
  8. Locked Candidates Type 1 (Pointing): 9 in b1 => r1c56<>9
  9. Locked Candidates Type 1 (Pointing): 7 in b3 => r456c9<>7
  10. Locked Candidates Type 1 (Pointing): 7 in b5 => r79c4<>7
  11. Locked Candidates Type 1 (Pointing): 4 in b9 => r9c12<>4
  12. Locked Candidates Type 1 (Pointing): 9 in b9 => r9c56<>9
  13. Hidden Pair: 4,9 in r9c79 => r9c79<>1, r9c79<>8, r9c9<>2, r9c9<>5
  14. Empty Rectangle: 2 in b6 (r8c19) => r4c1<>2
  15. Finned Swordfish: 5 r258 c159 fr5c2 => r46c1<>5
  16. Sue de Coq: r5c12 - {23457} (r5c9 - {25}, r4c13,r56c3,r6c1 - {134789}) => r4c2<>1, r4c2<>3, r4c2<>7
  17. Give Up: Don't know how to proceed!
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