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.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
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)
Show More...