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

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.

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