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

This Sudoku Puzzle has 53 steps and it is solved using Naked Single, Hidden Single, Naked Pair, undefined, Hidden Triple, Locked Candidates Type 2 (Claiming), Naked Triple, Naked Quadruple, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 9 / Column 1 → 1 (Naked Single)
  2. Row 1 / Column 9 → 2 (Hidden Single)
  3. Naked Pair: 2,6 in r3c36 => r3c89<>6
  4. 2-String Kite: 9 in r4c2,r7c6 (connected by r4c4,r5c6) => r7c2<>9
  5. Hidden Triple: 2,4,9 in r78c1,r8c2 => r7c1<>6
  6. Locked Candidates Type 2 (Claiming): 6 in c1 => r4c23,r5c23,r6c2<>6
  7. Row 4 / Column 3 → 5 (Naked Single)
  8. Naked Triple: 1,6,7 in r4c89,r6c8 => r5c89<>6, r5c8<>7
  9. Naked Quadruple: 2,3,5,8 in r5c3789 => r5c12<>2, r5c2<>8
  10. 2-String Kite: 6 in r1c4,r4c9 (connected by r1c8,r2c9) => r4c4<>6
  11. Locked Candidates Type 2 (Claiming): 6 in r4 => r6c8<>6
  12. W-Wing: 6/2 in r3c6,r6c1 connected by 2 in r35c3 => r6c6<>6
  13. Row 6 / Column 6 → 7 (Naked Single)
  14. Row 4 / Column 4 → 9 (Naked Single)
  15. Row 6 / Column 8 → 1 (Naked Single)
  16. Row 9 / Column 6 → 3 (Naked Single)
  17. Row 8 / Column 4 → 4 (Naked Single)
  18. Row 3 / Column 8 → 5 (Naked Single)
  19. Row 4 / Column 9 → 6 (Naked Single)
  20. Row 9 / Column 3 → 8 (Naked Single)
  21. Row 5 / Column 4 → 6 (Naked Single)
  22. Row 1 / Column 4 → 7 (Full House)
  23. Row 5 / Column 6 → 4 (Full House)
  24. Row 7 / Column 5 → 5 (Naked Single)
  25. Row 7 / Column 6 → 9 (Naked Single)
  26. Row 9 / Column 5 → 7 (Full House)
  27. Row 9 / Column 2 → 5 (Full House)
  28. Row 1 / Column 5 → 4 (Full House)
  29. Row 1 / Column 8 → 6 (Full House)
  30. Row 3 / Column 7 → 8 (Naked Single)
  31. Row 5 / Column 8 → 3 (Naked Single)
  32. Row 2 / Column 9 → 3 (Naked Single)
  33. Row 4 / Column 8 → 7 (Naked Single)
  34. Row 2 / Column 8 → 4 (Full House)
  35. Row 3 / Column 9 → 1 (Full House)
  36. Row 5 / Column 9 → 8 (Full House)
  37. Row 4 / Column 2 → 1 (Full House)
  38. Row 5 / Column 3 → 2 (Naked Single)
  39. Row 5 / Column 1 → 9 (Naked Single)
  40. Row 7 / Column 2 → 6 (Naked Single)
  41. Row 7 / Column 1 → 4 (Naked Single)
  42. Row 7 / Column 3 → 3 (Full House)
  43. Row 3 / Column 3 → 6 (Full House)
  44. Row 2 / Column 2 → 2 (Full House)
  45. Row 3 / Column 6 → 2 (Full House)
  46. Row 2 / Column 6 → 6 (Full House)
  47. Row 6 / Column 7 → 2 (Naked Single)
  48. Row 5 / Column 7 → 5 (Full House)
  49. Row 5 / Column 2 → 7 (Full House)
  50. Row 6 / Column 1 → 6 (Naked Single)
  51. Row 6 / Column 2 → 8 (Full House)
  52. Row 8 / Column 1 → 2 (Full House)
  53. Row 8 / Column 2 → 9 (Full House)
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