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

This Sudoku Puzzle has 29 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Empty Rectangle, Discontinuous Nice Loop, Naked Triple, Hidden Pair, Uniqueness Test 1, Uniqueness Test 4, Uniqueness Test 6, Naked Pair, undefined, Give Up techniques.

Naked Single Explanation
Hidden Single Explanation
Hidden Pair Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 8 / Column 1 → 2 (Naked Single)
  2. Row 8 / Column 9 → 4 (Naked Single)
  3. Row 8 / Column 3 → 8 (Naked Single)
  4. Row 1 / Column 4 → 8 (Hidden Single)
  5. Row 3 / Column 2 → 8 (Hidden Single)
  6. Row 5 / Column 4 → 4 (Hidden Single)
  7. Row 1 / Column 5 → 6 (Hidden Single)
  8. Row 3 / Column 8 → 6 (Hidden Single)
  9. Row 1 / Column 8 → 4 (Hidden Single)
  10. Locked Candidates Type 1 (Pointing): 3 in b2 => r2c7<>3
  11. Locked Candidates Type 1 (Pointing): 2 in b3 => r57c7<>2
  12. Locked Candidates Type 1 (Pointing): 9 in b3 => r56c7<>9
  13. Empty Rectangle: 1 in b5 (r3c47) => r6c7<>1
  14. Discontinuous Nice Loop: 2 r9c4 -2- r3c4 -1- r2c5 -3- r2c4 =3= r9c4 => r9c4<>2
  15. Locked Candidates Type 1 (Pointing): 2 in b8 => r2c6<>2
  16. Naked Triple: 1,3,4 in r79c5,r9c4 => r79c6<>1
  17. Hidden Pair: 1,4 in r7c25 => r7c5<>3
  18. Locked Candidates Type 1 (Pointing): 3 in b8 => r9c8<>3
  19. Uniqueness Test 1: 2/8 in r7c68,r9c68 => r7c8<>2, r7c8<>8
  20. Row 7 / Column 8 → 3 (Naked Single)
  21. Uniqueness Test 4: 1/2 in r2c47,r3c47 => r2c47<>1
  22. Uniqueness Test 6: 1/3 in r2c45,r9c45 => r2c4,r9c5<>3
  23. Row 2 / Column 5 → 3 (Hidden Single)
  24. Row 9 / Column 4 → 3 (Hidden Single)
  25. Uniqueness Test 1: 1/4 in r7c25,r9c25 => r9c2<>1, r9c2<>4
  26. Row 9 / Column 2 → 6 (Naked Single)
  27. Naked Pair: 1,4 in r29c3 => r456c3<>1
  28. Almost Locked Set XZ-Rule: A=r6c24678 {135789}, B=r1235c7 {12379}, X=3, Z=7 => r6c9<>7
  29. Give Up: Don't know how to proceed!
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