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

This Sudoku Puzzle has 34 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Triple, Continuous Nice Loop, Naked Pair, Multi Colors 1, undefined, AIC, Naked Single, Full House, Skyscraper, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 5 → 5 (Hidden Single)
  2. Row 9 / Column 3 → 5 (Hidden Single)
  3. Row 8 / Column 9 → 5 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 4 in b6 => r5c46<>4
  5. Locked Candidates Type 1 (Pointing): 1 in b8 => r8c2<>1
  6. Locked Candidates Type 1 (Pointing): 7 in b9 => r5c8<>7
  7. Hidden Triple: 4,5,7 in r5c679 => r5c6<>1, r5c6<>9, r5c7<>8, r5c9<>6
  8. Continuous Nice Loop: 2/8 6= r2c8 =2= r2c1 -2- r4c1 -8- r4c7 -5- r4c6 =5= r5c6 =7= r5c9 -7- r4c9 -6- r3c9 =6= r2c8 =2 => r3c1<>2, r2c8,r4c25<>8
  9. Naked Pair: 6,7 in r4c59 => r4c2<>6, r4c6<>7
  10. Multi Colors 1: 8 (r1c8,r4c7) / (r3c7,r4c1), (r8c1) / (r8c2) => r1c2<>8
  11. XY-Chain: 1 1- r4c2 -2- r4c1 -8- r4c7 -5- r5c7 -4- r5c9 -7- r4c9 -6- r4c5 -7- r7c5 -3- r7c3 -1 => r5c3,r7c2<>1
  12. Row 7 / Column 3 → 1 (Hidden Single)
  13. Row 1 / Column 3 → 3 (Hidden Single)
  14. 2-String Kite: 8 in r1c8,r6c5 (connected by r1c4,r2c5) => r6c8<>8
  15. XY-Chain: 1 1- r4c2 -2- r4c1 -8- r4c7 -5- r5c7 -4- r5c9 -7- r4c9 -6- r6c8 -1 => r6c2<>1
  16. AIC: 6 6- r2c3 =6= r2c8 =2= r1c8 =8= r1c4 -8- r2c5 =8= r6c5 =6= r4c5 -6- r4c9 =6= r3c9 -6 => r2c8,r3c23<>6
  17. Row 2 / Column 8 → 2 (Naked Single)
  18. Row 1 / Column 8 → 8 (Naked Single)
  19. Row 3 / Column 7 → 4 (Naked Single)
  20. Row 1 / Column 9 → 9 (Naked Single)
  21. Row 3 / Column 9 → 6 (Full House)
  22. Row 5 / Column 7 → 5 (Naked Single)
  23. Row 4 / Column 7 → 8 (Full House)
  24. Row 4 / Column 9 → 7 (Naked Single)
  25. Row 5 / Column 9 → 4 (Full House)
  26. Row 5 / Column 6 → 7 (Naked Single)
  27. Row 4 / Column 1 → 2 (Naked Single)
  28. Row 4 / Column 5 → 6 (Naked Single)
  29. Row 4 / Column 2 → 1 (Naked Single)
  30. Row 4 / Column 6 → 5 (Full House)
  31. Row 2 / Column 3 → 6 (Hidden Single)
  32. Locked Candidates Type 1 (Pointing): 9 in b1 => r3c4<>9
  33. Skyscraper: 4 in r1c4,r9c5 (connected by r19c2) => r2c5,r8c4<>4
  34. Give Up: Don't know how to proceed!
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