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

This Sudoku Puzzle has 27 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Skyscraper, undefined, Discontinuous Nice Loop, Simple Colors Trap, Give Up techniques.

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

Solution Steps:

  1. Row 6 / Column 4 → 8 (Naked Single)
  2. Row 6 / Column 5 → 3 (Naked Single)
  3. Row 1 / Column 7 → 9 (Naked Single)
  4. Row 3 / Column 7 → 3 (Naked Single)
  5. Row 4 / Column 7 → 8 (Naked Single)
  6. Row 7 / Column 7 → 4 (Naked Single)
  7. Row 8 / Column 7 → 2 (Full House)
  8. Row 1 / Column 2 → 7 (Hidden Single)
  9. Row 4 / Column 3 → 1 (Hidden Single)
  10. Row 6 / Column 9 → 4 (Hidden Single)
  11. Row 3 / Column 9 → 1 (Hidden Single)
  12. Row 2 / Column 1 → 3 (Hidden Single)
  13. Row 4 / Column 8 → 3 (Hidden Single)
  14. Row 2 / Column 2 → 8 (Hidden Single)
  15. Locked Candidates Type 1 (Pointing): 4 in b1 => r3c45<>4
  16. Naked Pair: 5,6 in r2c68 => r2c4<>5, r2c45<>6
  17. Skyscraper: 5 in r1c3,r4c1 (connected by r14c9) => r3c1<>5
  18. W-Wing: 6/5 in r1c3,r4c1 connected by 5 in r14c9 => r3c1,r5c3<>6
  19. Row 3 / Column 1 → 4 (Naked Single)
  20. Locked Candidates Type 1 (Pointing): 6 in b4 => r78c1<>6
  21. Discontinuous Nice Loop: 6 r3c2 -6- r1c3 -5- r1c9 =5= r4c9 -5- r4c1 =5= r6c2 =2= r3c2 => r3c2<>6
  22. Locked Candidates Type 1 (Pointing): 6 in b1 => r789c3<>6
  23. Naked Pair: 2,5 in r36c2 => r78c2<>5
  24. Simple Colors Trap: 5 (r1c3,r2c8,r4c9,r6c2) / (r1c9,r2c6,r3c2,r4c1,r6c8) => r3c3<>5
  25. Discontinuous Nice Loop: 8 r8c6 -8- r9c6 =8= r9c3 =4= r8c3 =3= r8c6 => r8c6<>8
  26. Discontinuous Nice Loop: 6 r9c6 -6- r2c6 -5- r2c8 =5= r6c8 =2= r6c2 -2- r5c3 -8- r9c3 =8= r9c6 => r9c6<>6
  27. Give Up: Don't know how to proceed!
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