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.

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