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.

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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