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

This Sudoku Puzzle has 45 steps and it is solved using Locked Candidates Type 2 (Claiming), Naked Triple, Skyscraper, Naked Single, Full House, Empty Rectangle, Naked Pair, Turbot Fish, undefined, Hidden Single techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 2 (Claiming): 6 in c7 => r456c9,r6c8<>6
  2. Naked Triple: 3,6,8 in r6c268 => r6c19<>3, r6c1<>6, r6c19<>8
  3. Skyscraper: 5 in r7c9,r9c4 (connected by r1c49) => r7c5,r9c8<>5
  4. Row 7 / Column 5 → 6 (Naked Single)
  5. Row 7 / Column 9 → 5 (Full House)
  6. Row 9 / Column 8 → 6 (Full House)
  7. Skyscraper: 6 in r2c1,r6c2 (connected by r26c6) => r1c2,r45c1<>6
  8. Empty Rectangle: 8 in b6 (r3c69) => r6c6<>8
  9. Naked Pair: 3,6 in r4c4,r6c6 => r4c56,r5c56<>3, r45c6<>6
  10. Turbot Fish: 8 r2c1 =8= r1c2 -8- r6c2 =8= r6c8 => r2c8<>8
  11. W-Wing: 3/6 in r3c3,r6c6 connected by 6 in r2c16 => r3c6<>3
  12. XYZ-Wing: 3/5/8 in r1c28,r2c8 => r1c9<>3
  13. XY-Wing: 3/8/6 in r1c29,r3c3 => r3c9<>6
  14. Row 1 / Column 9 → 6 (Hidden Single)
  15. Row 4 / Column 4 → 6 (Hidden Single)
  16. Row 4 / Column 7 → 4 (Naked Single)
  17. Row 5 / Column 7 → 6 (Full House)
  18. Row 6 / Column 6 → 3 (Naked Single)
  19. Row 4 / Column 6 → 8 (Naked Single)
  20. Row 6 / Column 8 → 8 (Naked Single)
  21. Row 3 / Column 6 → 6 (Naked Single)
  22. Row 4 / Column 5 → 1 (Naked Single)
  23. Row 6 / Column 2 → 6 (Naked Single)
  24. Row 2 / Column 6 → 5 (Naked Single)
  25. Row 5 / Column 6 → 4 (Full House)
  26. Row 5 / Column 5 → 5 (Full House)
  27. Row 3 / Column 3 → 3 (Naked Single)
  28. Row 3 / Column 9 → 8 (Full House)
  29. Row 8 / Column 3 → 6 (Full House)
  30. Row 8 / Column 1 → 3 (Full House)
  31. Row 1 / Column 4 → 3 (Naked Single)
  32. Row 2 / Column 5 → 8 (Full House)
  33. Row 9 / Column 5 → 3 (Full House)
  34. Row 9 / Column 4 → 5 (Full House)
  35. Row 2 / Column 8 → 3 (Naked Single)
  36. Row 1 / Column 8 → 5 (Full House)
  37. Row 1 / Column 2 → 8 (Full House)
  38. Row 2 / Column 1 → 6 (Full House)
  39. Row 5 / Column 2 → 3 (Full House)
  40. Row 4 / Column 1 → 9 (Naked Single)
  41. Row 4 / Column 9 → 3 (Full House)
  42. Row 5 / Column 9 → 1 (Naked Single)
  43. Row 5 / Column 1 → 8 (Full House)
  44. Row 6 / Column 1 → 1 (Full House)
  45. Row 6 / Column 9 → 9 (Full House)
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