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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Locked Candidates Type 2 (Claiming), Locked Pair, Naked Pair, undefined, Naked Triple, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 4 → 2 (Hidden Single)
  2. Row 4 / Column 2 → 2 (Hidden Single)
  3. Row 1 / Column 4 → 1 (Hidden Single)
  4. Row 9 / Column 6 → 9 (Hidden Single)
  5. Row 5 / Column 8 → 6 (Hidden Single)
  6. Locked Candidates Type 2 (Claiming): 3 in c2 => r8c1,r9c3<>3
  7. Locked Candidates Type 2 (Claiming): 5 in c4 => r78c5<>5
  8. Locked Pair: 4,7 in r78c5 => r23c5,r8c4<>7
  9. Naked Pair: 5,8 in r8c1,r9c3 => r7c13<>5, r89c2<>8
  10. Row 7 / Column 7 → 5 (Hidden Single)
  11. X-Wing: 1 r59 c27 => r4c7<>1
  12. Naked Triple: 6,7,8 in r4c467 => r4c19<>8
  13. 2-String Kite: 9 in r3c1,r5c7 (connected by r5c3,r6c1) => r3c7<>9
  14. W-Wing: 7/6 in r3c4,r7c3 connected by 6 in r1c36 => r3c3<>7
  15. XY-Chain: 6 6- r2c1 -8- r8c1 -5- r8c4 -3- r8c2 -7- r7c3 -6 => r13c3,r7c1<>6
  16. Row 7 / Column 1 → 1 (Naked Single)
  17. Row 4 / Column 1 → 3 (Naked Single)
  18. Row 7 / Column 9 → 4 (Naked Single)
  19. Row 9 / Column 2 → 3 (Naked Single)
  20. Row 4 / Column 9 → 1 (Naked Single)
  21. Row 7 / Column 5 → 7 (Naked Single)
  22. Row 7 / Column 3 → 6 (Full House)
  23. Row 8 / Column 2 → 7 (Naked Single)
  24. Row 9 / Column 4 → 5 (Naked Single)
  25. Row 8 / Column 5 → 4 (Naked Single)
  26. Row 8 / Column 4 → 3 (Full House)
  27. Row 9 / Column 3 → 8 (Naked Single)
  28. Row 8 / Column 1 → 5 (Full House)
  29. Row 9 / Column 8 → 2 (Naked Single)
  30. Row 9 / Column 7 → 1 (Full House)
  31. Row 1 / Column 6 → 6 (Hidden Single)
  32. Row 3 / Column 4 → 7 (Naked Single)
  33. Row 4 / Column 4 → 6 (Full House)
  34. Row 5 / Column 2 → 1 (Hidden Single)
  35. Row 3 / Column 3 → 3 (Hidden Single)
  36. Row 6 / Column 9 → 3 (Hidden Single)
  37. Row 1 / Column 3 → 7 (Hidden Single)
  38. Row 2 / Column 5 → 2 (Hidden Single)
  39. Row 3 / Column 5 → 8 (Naked Single)
  40. Row 2 / Column 6 → 5 (Full House)
  41. Row 5 / Column 5 → 5 (Full House)
  42. Row 3 / Column 7 → 2 (Naked Single)
  43. Row 5 / Column 3 → 9 (Naked Single)
  44. Row 5 / Column 7 → 8 (Full House)
  45. Row 6 / Column 3 → 5 (Full House)
  46. Row 6 / Column 1 → 8 (Full House)
  47. Row 1 / Column 7 → 9 (Naked Single)
  48. Row 4 / Column 7 → 7 (Full House)
  49. Row 4 / Column 6 → 8 (Full House)
  50. Row 6 / Column 6 → 7 (Full House)
  51. Row 6 / Column 8 → 9 (Full House)
  52. Row 2 / Column 1 → 6 (Naked Single)
  53. Row 3 / Column 1 → 9 (Full House)
  54. Row 3 / Column 9 → 6 (Full House)
  55. Row 8 / Column 8 → 8 (Naked Single)
  56. Row 8 / Column 9 → 9 (Full House)
  57. Row 2 / Column 9 → 8 (Full House)
  58. Row 1 / Column 8 → 4 (Naked Single)
  59. Row 1 / Column 2 → 8 (Full House)
  60. Row 2 / Column 2 → 4 (Full House)
  61. Row 2 / Column 8 → 7 (Full House)
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