Solution for Evil Sudoku #1192458173641

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

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 7 → 4 (Naked Single)
  2. Row 5 / Column 2 → 5 (Naked Single)
  3. Row 5 / Column 3 → 7 (Naked Single)
  4. Row 5 / Column 8 → 3 (Full House)
  5. Row 3 / Column 9 → 3 (Hidden Single)
  6. Row 6 / Column 6 → 3 (Hidden Single)
  7. Row 9 / Column 1 → 3 (Hidden Single)
  8. Row 9 / Column 2 → 9 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 4 in b3 => r2c13<>4
  10. Locked Candidates Type 1 (Pointing): 9 in b4 => r6c4<>9
  11. Locked Candidates Type 1 (Pointing): 2 in b7 => r8c49<>2
  12. Locked Candidates Type 2 (Claiming): 6 in r9 => r7c89,r8c79<>6
  13. Naked Triple: 6,7,8 in r368c4 => r27c4<>6, r24c4<>7, r2c4<>8
  14. Hidden Pair: 2,5 in r1c5,r2c4 => r1c5<>1, r1c5<>8
  15. 2-String Kite: 6 in r3c4,r7c1 (connected by r7c6,r8c4) => r3c1<>6
  16. Locked Candidates Type 2 (Claiming): 6 in r3 => r2c6<>6
  17. XY-Wing: 1/7/6 in r4c7,r69c8 => r9c7<>6
  18. Row 9 / Column 7 → 8 (Naked Single)
  19. XY-Chain: 6 6- r2c3 -2- r2c4 -5- r1c5 -2- r9c5 -7- r9c8 -6 => r2c8<>6
  20. AIC: 6 6- r2c3 -2- r2c4 =2= r7c4 =9= r7c6 =6= r7c1 -6 => r12c1,r8c3<>6
  21. Locked Pair: 2,4 in r8c23 => r78c1,r8c9<>4
  22. Continuous Nice Loop: 1/6/7/8 4= r2c9 =8= r2c6 -8- r8c6 =8= r8c4 -8- r6c4 -7- r6c8 =7= r9c8 =6= r9c9 =2= r7c9 =4= r2c9 =8 => r27c9<>1, r2c9<>6, r6c5,r9c9<>7, r3c46<>8
  23. Skyscraper: 7 in r6c4,r9c5 (connected by r69c8) => r4c5,r8c4<>7
  24. X-Wing: 7 r48 c69 => r23c6<>7
  25. Row 2 / Column 1 → 7 (Hidden Single)
  26. Sue de Coq: r78c6 - {16789} (r23c6 - {168}, r7c4,r9c5 - {279}) => r7c5<>2
  27. Row 7 / Column 5 → 1 (Naked Single)
  28. XY-Chain: 5 5- r1c5 -2- r9c5 -7- r9c8 -6- r9c9 -2- r7c9 -4- r7c8 -5 => r1c8<>5
  29. Row 1 / Column 5 → 5 (Hidden Single)
  30. Row 2 / Column 4 → 2 (Naked Single)
  31. Row 4 / Column 5 → 4 (Naked Single)
  32. Row 2 / Column 3 → 6 (Naked Single)
  33. Row 7 / Column 4 → 9 (Naked Single)
  34. Row 4 / Column 2 → 1 (Naked Single)
  35. Row 6 / Column 5 → 8 (Naked Single)
  36. Row 4 / Column 4 → 5 (Naked Single)
  37. Row 7 / Column 6 → 6 (Naked Single)
  38. Row 4 / Column 7 → 6 (Naked Single)
  39. Row 3 / Column 5 → 7 (Naked Single)
  40. Row 9 / Column 5 → 2 (Full House)
  41. Row 6 / Column 4 → 7 (Naked Single)
  42. Row 4 / Column 6 → 9 (Full House)
  43. Row 4 / Column 9 → 7 (Full House)
  44. Row 6 / Column 8 → 1 (Full House)
  45. Row 3 / Column 6 → 1 (Naked Single)
  46. Row 7 / Column 1 → 5 (Naked Single)
  47. Row 8 / Column 4 → 8 (Naked Single)
  48. Row 3 / Column 4 → 6 (Full House)
  49. Row 2 / Column 6 → 8 (Full House)
  50. Row 8 / Column 6 → 7 (Full House)
  51. Row 9 / Column 9 → 6 (Naked Single)
  52. Row 9 / Column 8 → 7 (Full House)
  53. Row 8 / Column 9 → 1 (Naked Single)
  54. Row 1 / Column 8 → 6 (Naked Single)
  55. Row 3 / Column 1 → 4 (Naked Single)
  56. Row 3 / Column 2 → 8 (Full House)
  57. Row 7 / Column 8 → 4 (Naked Single)
  58. Row 2 / Column 8 → 5 (Full House)
  59. Row 7 / Column 9 → 2 (Full House)
  60. Row 8 / Column 7 → 5 (Full House)
  61. Row 2 / Column 7 → 1 (Full House)
  62. Row 2 / Column 9 → 4 (Full House)
  63. Row 1 / Column 9 → 8 (Full House)
  64. Row 8 / Column 1 → 6 (Naked Single)
  65. Row 6 / Column 1 → 9 (Naked Single)
  66. Row 1 / Column 1 → 1 (Full House)
  67. Row 6 / Column 3 → 4 (Full House)
  68. Row 1 / Column 2 → 2 (Naked Single)
  69. Row 1 / Column 3 → 9 (Full House)
  70. Row 8 / Column 3 → 2 (Full House)
  71. Row 8 / Column 2 → 4 (Full House)
Show More...