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

This Sudoku Puzzle has 34 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Triple, Locked Candidates Type 1 (Pointing), Naked Pair, Naked Triple, Uniqueness Test 1, Avoidable Rectangle Type 1, Give Up techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 6 / Column 6 → 9 (Hidden Single)
  2. Row 8 / Column 6 → 5 (Naked Single)
  3. Row 8 / Column 4 → 9 (Naked Single)
  4. Row 8 / Column 3 → 8 (Naked Single)
  5. Row 8 / Column 8 → 1 (Full House)
  6. Row 2 / Column 9 → 8 (Hidden Single)
  7. Row 6 / Column 3 → 6 (Hidden Single)
  8. Row 7 / Column 3 → 9 (Hidden Single)
  9. Row 7 / Column 9 → 7 (Hidden Single)
  10. Row 7 / Column 1 → 5 (Naked Single)
  11. Row 7 / Column 8 → 8 (Full House)
  12. Row 9 / Column 1 → 7 (Full House)
  13. Locked Triple: 1,5,7 in r456c2 => r12c2,r5c3<>5, r1c2,r5c3<>7
  14. Locked Candidates Type 1 (Pointing): 5 in b2 => r2c37<>5
  15. Locked Candidates Type 1 (Pointing): 5 in b5 => r5c27<>5
  16. Naked Pair: 3,4 in r2c3,r3c1 => r13c3<>4, r3c3<>3
  17. Naked Pair: 1,5 in r6c29 => r6c8<>5
  18. Naked Triple: 3,4,5 in r2c345 => r2c6<>3, r2c67<>4
  19. Row 2 / Column 6 → 1 (Naked Single)
  20. Naked Triple: 3,4,5 in r5c345 => r5c7<>4
  21. Uniqueness Test 1: 2/9 in r1c27,r2c27 => r1c7<>2, r1c7<>9
  22. Row 1 / Column 2 → 9 (Hidden Single)
  23. Row 2 / Column 2 → 2 (Naked Single)
  24. Row 2 / Column 7 → 9 (Naked Single)
  25. Row 1 / Column 8 → 2 (Hidden Single)
  26. Row 9 / Column 8 → 5 (Naked Single)
  27. Row 9 / Column 7 → 2 (Full House)
  28. Locked Candidates Type 1 (Pointing): 4 in b3 => r4c7<>4
  29. Avoidable Rectangle Type 1: 2/5 in r1c78,r9c78 => r1c7<>5
  30. Row 1 / Column 7 → 4 (Naked Single)
  31. Row 1 / Column 6 → 7 (Naked Single)
  32. Row 1 / Column 3 → 5 (Full House)
  33. Row 3 / Column 3 → 7 (Naked Single)
  34. Give Up: Don't know how to proceed!
Show More...