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

This Sudoku Puzzle has 15 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Discontinuous Nice Loop, Naked Single, Give Up techniques.

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

Solution Steps:

  1. Row 2 / Column 7 → 1 (Hidden Single)
  2. Row 7 / Column 7 → 8 (Hidden Single)
  3. Row 7 / Column 9 → 1 (Hidden Single)
  4. Row 7 / Column 2 → 3 (Hidden Single)
  5. Row 8 / Column 8 → 3 (Hidden Single)
  6. Row 4 / Column 7 → 6 (Hidden Single)
  7. Row 3 / Column 9 → 6 (Hidden Single)
  8. Locked Candidates Type 1 (Pointing): 2 in b3 => r46c8<>2
  9. Locked Candidates Type 1 (Pointing): 5 in b3 => r6c8<>5
  10. Locked Candidates Type 2 (Claiming): 4 in r5 => r46c3,r6c2<>4
  11. Discontinuous Nice Loop: 6 r6c5 -6- r7c5 -4- r9c6 =4= r6c6 =1= r6c5 => r6c5<>6
  12. Locked Candidates Type 1 (Pointing): 6 in b5 => r7c4<>6
  13. Row 7 / Column 4 → 5 (Naked Single)
  14. Discontinuous Nice Loop: 6 r5c2 -6- r2c2 =6= r2c3 -6- r7c3 -4- r5c3 =4= r5c2 => r5c2<>6
  15. Give Up: Don't know how to proceed!
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