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

This Sudoku Puzzle has 46 steps and it is solved using Locked Pair, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Hidden Single, Swordfish, Naked Single, Sue de Coq, undefined, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Locked Pair: 1,5 in r9c46 => r8c4,r9c3<>1, r8c45,r9c38<>5
  2. Locked Candidates Type 1 (Pointing): 9 in b9 => r3c8<>9
  3. Locked Candidates Type 2 (Claiming): 5 in c5 => r4c46,r5c46<>5
  4. Locked Candidates Type 2 (Claiming): 8 in c6 => r4c45,r5c45,r6c5<>8
  5. Row 6 / Column 9 → 8 (Hidden Single)
  6. Swordfish: 5 r567 c258 => r38c2,r4c5,r8c8<>5
  7. Row 8 / Column 2 → 1 (Naked Single)
  8. Row 1 / Column 3 → 1 (Hidden Single)
  9. Sue de Coq: r3c23 - {5789} (r3c89 - {679}, r12c1 - {568}) => r1c2<>8, r3c4<>6, r3c4<>7, r3c4<>9
  10. Locked Candidates Type 2 (Claiming): 6 in r3 => r2c9<>6
  11. XY-Chain: 5 5- r2c1 -6- r1c1 -8- r4c1 -5- r5c2 -8- r5c6 -7- r5c4 -4- r8c4 -8- r3c4 -5 => r2c46,r3c3<>5
  12. Row 2 / Column 6 → 7 (Naked Single)
  13. Row 3 / Column 3 → 9 (Naked Single)
  14. Row 2 / Column 9 → 9 (Naked Single)
  15. Row 5 / Column 6 → 8 (Naked Single)
  16. Row 1 / Column 2 → 7 (Naked Single)
  17. Row 9 / Column 3 → 2 (Naked Single)
  18. Row 8 / Column 3 → 5 (Full House)
  19. Row 7 / Column 2 → 9 (Full House)
  20. Row 7 / Column 8 → 5 (Full House)
  21. Row 2 / Column 4 → 6 (Naked Single)
  22. Row 2 / Column 1 → 5 (Full House)
  23. Row 4 / Column 6 → 1 (Naked Single)
  24. Row 9 / Column 6 → 5 (Full House)
  25. Row 5 / Column 2 → 5 (Naked Single)
  26. Row 3 / Column 2 → 8 (Full House)
  27. Row 4 / Column 1 → 8 (Full House)
  28. Row 1 / Column 1 → 6 (Full House)
  29. Row 9 / Column 8 → 9 (Naked Single)
  30. Row 9 / Column 4 → 1 (Full House)
  31. Row 8 / Column 9 → 7 (Naked Single)
  32. Row 8 / Column 8 → 2 (Full House)
  33. Row 6 / Column 8 → 6 (Naked Single)
  34. Row 3 / Column 8 → 7 (Full House)
  35. Row 3 / Column 9 → 6 (Full House)
  36. Row 3 / Column 4 → 5 (Full House)
  37. Row 4 / Column 9 → 5 (Full House)
  38. Row 6 / Column 5 → 5 (Full House)
  39. Row 4 / Column 4 → 9 (Naked Single)
  40. Row 4 / Column 5 → 6 (Full House)
  41. Row 5 / Column 5 → 4 (Naked Single)
  42. Row 5 / Column 4 → 7 (Full House)
  43. Row 1 / Column 4 → 8 (Naked Single)
  44. Row 1 / Column 5 → 9 (Full House)
  45. Row 8 / Column 5 → 8 (Full House)
  46. Row 8 / Column 4 → 4 (Full House)
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