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

This Sudoku Puzzle has 15 steps and it is solved using Naked Triple, Uniqueness Test 1, Naked Single, Full House, Give Up techniques.

Naked Single Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Naked Triple: 3,4,6 in r368c6 => r2c6<>4
  2. Uniqueness Test 1: 1/4 in r3c12,r5c12 => r3c1<>1, r3c1<>4
  3. Row 3 / Column 1 → 6 (Naked Single)
  4. Row 1 / Column 1 → 2 (Naked Single)
  5. Row 1 / Column 4 → 6 (Full House)
  6. Row 3 / Column 6 → 4 (Naked Single)
  7. Row 3 / Column 2 → 1 (Full House)
  8. Row 2 / Column 1 → 4 (Full House)
  9. Row 5 / Column 2 → 4 (Full House)
  10. Row 5 / Column 1 → 1 (Full House)
  11. Row 8 / Column 4 → 3 (Naked Single)
  12. Row 8 / Column 6 → 6 (Full House)
  13. Row 6 / Column 6 → 3 (Naked Single)
  14. Row 6 / Column 4 → 4 (Full House)
  15. Give Up: Don't know how to proceed!
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