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

This Sudoku Puzzle has 8 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Grouped Discontinuous Nice Loop, Give Up techniques.

Hidden Single Explanation
Locked Candidates Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 7 → 4 (Hidden Single)
  2. Row 5 / Column 4 → 2 (Hidden Single)
  3. Row 4 / Column 9 → 9 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 1 in b6 => r3c8<>1
  5. Locked Candidates Type 1 (Pointing): 3 in b6 => r137c8<>3
  6. Locked Candidates Type 1 (Pointing): 5 in b6 => r79c8<>5
  7. Grouped Discontinuous Nice Loop: 3 r7c9 -3- r7c123 =3= r8c3 =6= r8c9 =4= r7c9 => r7c9<>3
  8. Give Up: Don't know how to proceed!
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