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

This Sudoku Puzzle has 52 steps and it is solved using Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, Hidden Single, undefined, Locked Candidates Type 2 (Claiming), Naked Pair, Naked Single, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Candidates Type 1 (Pointing): 4 in b7 => r8c56<>4
  2. Locked Candidates Type 1 (Pointing): 6 in b9 => r9c5<>6
  3. Naked Triple: 4,5,8 in r389c6 => r456c6<>5, r456c6<>8, r56c6<>4
  4. Locked Candidates Type 1 (Pointing): 8 in b5 => r89c5<>8
  5. Hidden Pair: 2,7 in r4c16 => r4c1<>8, r4c16<>9
  6. Row 4 / Column 9 → 9 (Hidden Single)
  7. 2-String Kite: 1 in r4c7,r9c5 (connected by r8c7,r9c9) => r4c5<>1
  8. 2-String Kite: 5 in r1c4,r6c3 (connected by r1c2,r2c3) => r6c4<>5
  9. 2-String Kite: 5 in r3c8,r4c4 (connected by r1c4,r3c6) => r4c8<>5
  10. Locked Candidates Type 2 (Claiming): 5 in r4 => r56c5<>5
  11. Naked Pair: 6,8 in r49c8 => r5c8<>6, r5c8<>8
  12. Locked Candidates Type 1 (Pointing): 8 in b6 => r4c5<>8
  13. 2-String Kite: 6 in r6c3,r7c4 (connected by r7c2,r8c3) => r6c4<>6
  14. W-Wing: 4/1 in r6c4,r9c5 connected by 1 in r69c9 => r56c5<>4
  15. Row 9 / Column 5 → 4 (Hidden Single)
  16. Row 9 / Column 6 → 8 (Naked Single)
  17. Row 8 / Column 6 → 5 (Naked Single)
  18. Row 9 / Column 8 → 6 (Naked Single)
  19. Row 9 / Column 9 → 1 (Full House)
  20. Row 8 / Column 7 → 8 (Full House)
  21. Row 4 / Column 7 → 1 (Full House)
  22. Row 3 / Column 6 → 4 (Naked Single)
  23. Row 1 / Column 4 → 5 (Full House)
  24. Row 3 / Column 8 → 5 (Full House)
  25. Row 2 / Column 9 → 4 (Full House)
  26. Row 2 / Column 3 → 5 (Full House)
  27. Row 4 / Column 8 → 8 (Naked Single)
  28. Row 5 / Column 8 → 4 (Full House)
  29. Row 1 / Column 2 → 2 (Naked Single)
  30. Row 1 / Column 1 → 4 (Full House)
  31. Row 4 / Column 4 → 6 (Naked Single)
  32. Row 6 / Column 3 → 6 (Naked Single)
  33. Row 8 / Column 3 → 4 (Full House)
  34. Row 8 / Column 1 → 9 (Naked Single)
  35. Row 4 / Column 5 → 5 (Naked Single)
  36. Row 5 / Column 5 → 8 (Naked Single)
  37. Row 7 / Column 4 → 1 (Naked Single)
  38. Row 6 / Column 4 → 4 (Full House)
  39. Row 7 / Column 2 → 6 (Full House)
  40. Row 8 / Column 5 → 6 (Full House)
  41. Row 6 / Column 5 → 1 (Full House)
  42. Row 8 / Column 2 → 1 (Full House)
  43. Row 6 / Column 9 → 5 (Naked Single)
  44. Row 5 / Column 9 → 6 (Full House)
  45. Row 5 / Column 1 → 7 (Naked Single)
  46. Row 6 / Column 2 → 9 (Naked Single)
  47. Row 5 / Column 2 → 5 (Full House)
  48. Row 5 / Column 6 → 9 (Full House)
  49. Row 4 / Column 1 → 2 (Naked Single)
  50. Row 4 / Column 6 → 7 (Full House)
  51. Row 6 / Column 6 → 2 (Full House)
  52. Row 6 / Column 1 → 8 (Full House)
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