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

This Sudoku Puzzle has 33 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Naked Triple, Uniqueness Test 3, Locked Candidates Type 2 (Claiming), undefined, Uniqueness Test 1, Give Up techniques.

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

Solution Steps:

  1. Row 4 / Column 7 → 8 (Naked Single)
  2. Row 4 / Column 9 → 7 (Naked Single)
  3. Row 3 / Column 7 → 4 (Naked Single)
  4. Row 5 / Column 7 → 5 (Full House)
  5. Row 4 / Column 5 → 6 (Naked Single)
  6. Row 5 / Column 8 → 1 (Naked Single)
  7. Row 5 / Column 9 → 4 (Full House)
  8. Row 8 / Column 9 → 5 (Naked Single)
  9. Row 1 / Column 9 → 9 (Naked Single)
  10. Row 3 / Column 9 → 6 (Full House)
  11. Row 5 / Column 6 → 7 (Hidden Single)
  12. Locked Pair: 1,4 in r8c46 => r8c12<>1, r8c12,r9c5<>4
  13. Row 9 / Column 2 → 4 (Hidden Single)
  14. Row 9 / Column 3 → 5 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 1 in b5 => r6c2<>1
  16. Naked Triple: 6,8,9 in r235c3 => r1c3<>8
  17. Uniqueness Test 3: 1/4 in r6c46,r8c46 => r6c5<>8
  18. Row 6 / Column 5 → 4 (Naked Single)
  19. Locked Candidates Type 1 (Pointing): 8 in b5 => r13c4<>8
  20. Locked Candidates Type 2 (Claiming): 8 in r3 => r1c12,r2c123<>8
  21. Naked Triple: 1,2,4 in r124c1 => r3c1<>2
  22. W-Wing: 4/2 in r1c4,r2c1 connected by 2 in r3c24 => r1c1,r2c6<>4
  23. Row 2 / Column 6 → 9 (Naked Single)
  24. Row 2 / Column 3 → 6 (Naked Single)
  25. Row 3 / Column 4 → 2 (Naked Single)
  26. Row 6 / Column 6 → 1 (Naked Single)
  27. Row 8 / Column 6 → 4 (Full House)
  28. Row 1 / Column 4 → 4 (Naked Single)
  29. Row 8 / Column 4 → 1 (Naked Single)
  30. Row 2 / Column 1 → 4 (Hidden Single)
  31. Row 5 / Column 2 → 6 (Hidden Single)
  32. Uniqueness Test 1: 1/2 in r1c12,r4c12 => r1c2<>1, r1c2<>2
  33. Give Up: Don't know how to proceed!
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