Solution for Evil Sudoku #3373148625941

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

This Sudoku Puzzle has 71 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Pair, undefined, AIC, Locked Pair, Continuous Nice Loop, Skyscraper, Sue de Coq techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 3 → 1 (Naked Single)
  2. Row 5 / Column 7 → 2 (Naked Single)
  3. Row 5 / Column 8 → 4 (Naked Single)
  4. Row 5 / Column 2 → 5 (Full House)
  5. Row 3 / Column 1 → 5 (Hidden Single)
  6. Row 6 / Column 4 → 5 (Hidden Single)
  7. Row 9 / Column 9 → 5 (Hidden Single)
  8. Row 9 / Column 8 → 7 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 1 in b1 => r2c79<>1
  10. Locked Candidates Type 1 (Pointing): 7 in b6 => r6c6<>7
  11. Locked Candidates Type 1 (Pointing): 3 in b9 => r8c16<>3
  12. Locked Candidates Type 2 (Claiming): 9 in r9 => r7c12,r8c13<>9
  13. Naked Triple: 2,8,9 in r368c6 => r24c6<>2, r2c6<>8, r27c6<>9
  14. Hidden Pair: 3,4 in r1c5,r2c6 => r1c5<>6, r1c5<>8
  15. 2-String Kite: 9 in r3c6,r7c9 (connected by r7c4,r8c6) => r3c9<>9
  16. Locked Candidates Type 2 (Claiming): 9 in r3 => r2c4<>9
  17. XY-Wing: 2/6/9 in r4c3,r69c2 => r9c3<>9
  18. Row 9 / Column 3 → 8 (Naked Single)
  19. XY-Chain: 9 9- r2c7 -3- r2c6 -4- r1c5 -3- r9c5 -2- r9c2 -9 => r2c2<>9
  20. AIC: 9 9- r2c7 -3- r2c6 =3= r7c6 =7= r7c4 =9= r7c9 -9 => r12c9,r8c7<>9
  21. Locked Pair: 1,3 in r8c78 => r78c9,r8c1<>1
  22. Continuous Nice Loop: 2/6/8/9 1= r2c1 =8= r2c4 -8- r8c4 =8= r8c6 -8- r6c6 -2- r6c2 =2= r9c2 =9= r9c1 =3= r7c1 =1= r2c1 =8 => r6c5,r9c1<>2, r27c1<>6, r3c46<>8, r2c1<>9
  23. Skyscraper: 2 in r6c6,r9c5 (connected by r69c2) => r4c5,r8c6<>2
  24. X-Wing: 2 r48 c14 => r23c4<>2
  25. Row 2 / Column 9 → 2 (Hidden Single)
  26. Sue de Coq: r78c4 - {26789} (r23c4 - {689}, r7c6,r9c5 - {237}) => r7c5<>3
  27. Row 7 / Column 5 → 6 (Naked Single)
  28. XY-Chain: 4 4- r1c5 -3- r9c5 -2- r9c2 -9- r9c1 -3- r7c1 -1- r7c2 -4 => r1c2<>4
  29. Row 1 / Column 5 → 4 (Hidden Single)
  30. Row 2 / Column 6 → 3 (Naked Single)
  31. Row 4 / Column 5 → 1 (Naked Single)
  32. Row 2 / Column 7 → 9 (Naked Single)
  33. Row 7 / Column 6 → 7 (Naked Single)
  34. Row 4 / Column 8 → 6 (Naked Single)
  35. Row 6 / Column 5 → 8 (Naked Single)
  36. Row 4 / Column 6 → 4 (Naked Single)
  37. Row 7 / Column 4 → 9 (Naked Single)
  38. Row 4 / Column 3 → 9 (Naked Single)
  39. Row 3 / Column 5 → 2 (Naked Single)
  40. Row 9 / Column 5 → 3 (Full House)
  41. Row 6 / Column 6 → 2 (Naked Single)
  42. Row 4 / Column 4 → 7 (Full House)
  43. Row 4 / Column 1 → 2 (Full House)
  44. Row 6 / Column 2 → 6 (Full House)
  45. Row 3 / Column 4 → 6 (Naked Single)
  46. Row 7 / Column 9 → 4 (Naked Single)
  47. Row 8 / Column 6 → 8 (Naked Single)
  48. Row 3 / Column 6 → 9 (Full House)
  49. Row 2 / Column 4 → 8 (Full House)
  50. Row 8 / Column 4 → 2 (Full House)
  51. Row 9 / Column 1 → 9 (Naked Single)
  52. Row 9 / Column 2 → 2 (Full House)
  53. Row 8 / Column 1 → 6 (Naked Single)
  54. Row 1 / Column 2 → 9 (Naked Single)
  55. Row 3 / Column 9 → 1 (Naked Single)
  56. Row 3 / Column 8 → 8 (Full House)
  57. Row 7 / Column 2 → 1 (Naked Single)
  58. Row 2 / Column 2 → 4 (Full House)
  59. Row 7 / Column 1 → 3 (Full House)
  60. Row 8 / Column 3 → 4 (Full House)
  61. Row 2 / Column 3 → 6 (Full House)
  62. Row 2 / Column 1 → 1 (Full House)
  63. Row 1 / Column 1 → 8 (Full House)
  64. Row 8 / Column 9 → 9 (Naked Single)
  65. Row 6 / Column 9 → 7 (Naked Single)
  66. Row 1 / Column 9 → 6 (Full House)
  67. Row 6 / Column 7 → 1 (Full House)
  68. Row 1 / Column 8 → 3 (Naked Single)
  69. Row 1 / Column 7 → 7 (Full House)
  70. Row 8 / Column 7 → 3 (Full House)
  71. Row 8 / Column 8 → 1 (Full House)
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