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

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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