1
5
9
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
3
5
2
7
1

This Sudoku Puzzle has 36 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Hidden Triple, Skyscraper, undefined, AIC, Naked Single, Empty Rectangle, Naked Pair, Continuous Nice Loop, Hidden Pair, Full House, Hidden Rectangle, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 9 → 9 (Hidden Single)
  2. Row 1 / Column 5 → 5 (Hidden Single)
  3. Row 9 / Column 3 → 5 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 4 in b3 => r3c124<>4
  5. Locked Candidates Type 1 (Pointing): 4 in b6 => r5c46<>4
  6. Locked Candidates Type 1 (Pointing): 1 in b8 => r8c2<>1
  7. Hidden Triple: 4,5,7 in r5c679 => r5c6<>1, r5c6<>9, r5c7<>8, r5c9<>6
  8. Skyscraper: 4 in r1c4,r9c5 (connected by r19c2) => r2c5,r8c4<>4
  9. W-Wing: 2/8 in r3c4,r4c1 connected by 8 in r34c7 => r3c1<>2
  10. AIC: 8 8- r1c8 -2- r2c8 =2= r2c1 -2- r4c1 -8- r4c7 =8= r3c7 =4= r3c9 =6= r3c2 -6- r2c3 -8 => r1c23,r2c8<>8
  11. Row 1 / Column 3 → 3 (Naked Single)
  12. Row 7 / Column 3 → 1 (Naked Single)
  13. Empty Rectangle: 8 in b2 (r25c3) => r5c4<>8
  14. Naked Pair: 1,9 in r58c4 => r6c4<>1, r6c4<>9
  15. Continuous Nice Loop: 6/7/8 2= r4c2 =1= r4c6 =5= r4c7 =8= r3c7 -8- r1c8 -2- r2c8 =2= r2c1 -2- r4c1 =2= r4c2 =1 => r4c2<>6, r4c6<>7, r4c2<>8
  16. Hidden Pair: 6,7 in r4c59 => r4c5<>8
  17. Locked Candidates Type 1 (Pointing): 8 in b5 => r6c28<>8
  18. XY-Chain: 1 1- r4c2 -2- r4c1 -8- r4c7 -5- r5c7 -4- r5c9 -7- r4c9 -6- r6c8 -1 => r6c2<>1
  19. AIC: 2 2- r1c2 -4- r1c4 =4= r6c4 =8= r6c5 =6= r4c5 -6- r4c9 =6= r3c9 -6- r2c8 -2 => r1c8,r2c1<>2
  20. Row 1 / Column 8 → 8 (Naked Single)
  21. Row 3 / Column 7 → 4 (Naked Single)
  22. Row 3 / Column 9 → 6 (Naked Single)
  23. Row 2 / Column 8 → 2 (Full House)
  24. Row 5 / Column 7 → 5 (Naked Single)
  25. Row 4 / Column 7 → 8 (Full House)
  26. Row 4 / Column 9 → 7 (Naked Single)
  27. Row 5 / Column 9 → 4 (Full House)
  28. Row 5 / Column 6 → 7 (Naked Single)
  29. Row 4 / Column 1 → 2 (Naked Single)
  30. Row 4 / Column 5 → 6 (Naked Single)
  31. Row 4 / Column 2 → 1 (Naked Single)
  32. Row 4 / Column 6 → 5 (Full House)
  33. Row 2 / Column 3 → 6 (Hidden Single)
  34. Row 5 / Column 3 → 8 (Full House)
  35. Hidden Rectangle: 7/8 in r3c12,r8c12 => r8c2<>7
  36. Give Up: Don't know how to proceed!
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