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

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
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!
Show More...