The New Sudoku Players' Forum

[MalcolmSm1th]

I have got so far with this puzzle (see http://www.dragondrop.com/images/IndependentSuduko20051210a.jpg and I can't work out what on earth is next step.

I've fed this very grid into SudukoWorks and it comes up with the solution so this means that I do know that I am correct so far.

But the problem with this program it doesn't tell me how it gets from the half empty grid to the solution.

Can anyone help?

- Malc

[Crazy Girl]

Malcolm,

from what I can see, there are some basic moves you can do.

* 9 and B can be placed in Column 7,
* 3 can be placed in Box 14
* 9 in Box 2
* 7 in box 6

Each time you add in a number, see if it unlocks anything else.

Is this puzzle a competition in the Independent Newspaper

[rubylips]

Here's the solution. Frankly, these puzzles are tedious rather than difficult to complete (unless you have a computer solver, in which case they are tedious rather than difficult to enter). Fiendish puzzles with X-Wings and the like on a standard grid are much more interesting.

Code: Select all

 9 . . . | . D E . | 2 . A . | . . . B
 3 . B C | 2 7 . . | E 5 . . | . 6 . 9
 A . . 0 | . 1 6 . | C . 3 B | . . E .
 F 5 8 E | A B 3 C | 9 4 6 0 | . . 7 1
---------+---------+---------+--------
 B . . A | . . F . | D 8 5 4 | 1 0 2 7
 . 8 3 D | E 5 . . | B 2 1 . | . . . .
 5 . . 1 | B A 4 2 | 7 9 0 3 | 8 . . .
 4 . . . | 1 8 D . | F E C . | . . . .
---------+---------+---------+--------
 7 . . 4 | 6 2 . 1 | A 3 9 D | F . 5 .
 2 . . 3 | 5 F . D | 0 B 4 7 | 6 . . .
 . . . 8 | . E . B | 5 6 2 F | 3 7 . 4
 6 . 5 F | 9 4 7 3 | 1 C 8 E | . . . .
---------+---------+---------+--------
 E . C . | . . . A | 6 . . 5 | . 1 . .
 D . . . | . 9 . . | 8 . 7 C | E A B F
 1 3 7 B | D 6 2 F | 4 A E 9 | . . C .
 8 . . . | . . . E | 3 . B 2 | . . 4 6

1. The cell r6c7 is the only candidate for the value 9 in Column 7.
2. The value 6 is the only candidate for the cell r5c8.
3. The cell r14c5 is the only candidate for the value 3 in Row 14.
4. The value 0 is the only candidate for the cell r13c6.
5. The value C is the only candidate for the cell r5c5.
6. The value 0 is the only candidate for the cell r11c5.
7. The value C is the only candidate for the cell r11c1.
8. The value A is the only candidate for the cell r11c7.
9. The value 0 is the only candidate for the cell r6c1.
10. The value 7 is the only candidate for the cell r16c5.
11. The value 7 is the only candidate for the cell r6c8.
12. The value 0 is the only candidate for the cell r8c8.
13. The value C is the only candidate for the cell r16c6.
14. The value 3 is the only candidate for the cell r5c6.
15. The cell r2c7 is the only candidate for the value 0 in Column 7.
16. The cell r7c2 is the only candidate for the value C in Column 2.
17. The cell r7c3 is the only candidate for the value F in Box 5.
18. The cell r7c15 is the only candidate for the value 6 in Row 7.
19. The cell r6c12 is the only candidate for the value 6 in Row 6.
20. The value A is the only candidate for the cell r8c12.
21. The cell r13c13 is the only candidate for the value 7 in Row 13.
22. The cell r13c16 is the only candidate for the value 2 in Box 16.
23. The value 9 is the only candidate for the cell r13c4.
24. The value 5 is the only candidate for the cell r16c4.
25. The value 1 is the only candidate for the cell r16c7.
26. The value 5 is the only candidate for the cell r14c7.
27. The value 4 is the only candidate for the cell r14c8.
28. The value 8 is the only candidate for the cell r2c8.
29. The value 5 is the only candidate for the cell r1c8.
30. The value 1 is the only candidate for the cell r2c12.
31. The value 8 is the only candidate for the cell r1c12.
32. The value 8 is the only candidate for the cell r13c5.
33. The value 9 is the only candidate for the cell r3c8.
34. The value B is the only candidate for the cell r13c7.
35. The cell r10c15 is the only candidate for the value 8 in Column 15.
36. The value C is the only candidate for the cell r10c7.
37. The value 8 is the only candidate for the cell r9c7.
38. The cell r13c2 is the only candidate for the value 4 in Row 13.
39. The value D is the only candidate for the cell r2c2.
40. The value F is the only candidate for the cell r2c11.
41. The value 7 is the only candidate for the cell r1c10.
42. The value D is the only candidate for the cell r3c10.
43. The value 6 is the only candidate for the cell r1c4.
44. The value 1 is the only candidate for the cell r1c2.
45. The value 9 is the only candidate for the cell r11c2.
46. The value 4 is the only candidate for the cell r1c3.
47. The value 2 is the only candidate for the cell r3c3.
48. The value F is the only candidate for the cell r1c5.
49. The value A is the only candidate for the cell r2c15.
50. The value 4 is the only candidate for the cell r2c13.
51. The value 5 is the only candidate for the cell r3c13.
52. The value 0 is the only candidate for the cell r15c13.
53. The value E is the only candidate for the cell r5c2.
54. The value A is the only candidate for the cell r10c2.
55. The value E is the only candidate for the cell r10c16.
56. The value C is the only candidate for the cell r1c13.
57. The value 3 is the only candidate for the cell r1c14.
58. The value 8 is the only candidate for the cell r3c16.
59. The value A is the only candidate for the cell r6c13.
60. The value C is the only candidate for the cell r6c16.
61. The value 0 is the only candidate for the cell r9c16.
62. The value D is the only candidate for the cell r12c15.
63. The value B is the only candidate for the cell r9c2.
64. The value 9 is the only candidate for the cell r10c14.
65. The value D is the only candidate for the cell r16c14.
66. The value 2 is the only candidate for the cell r4c14.
67. The value 0 is the only candidate for the cell r12c2.
68. The value B is the only candidate for the cell r12c14.
69. The value 5 is the only candidate for the cell r8c14.
70. The value 2 is the only candidate for the cell r14c4.
71. The value 6 is the only candidate for the cell r14c2.
72. The value 0 is the only candidate for the cell r14c3.
73. The value 7 is the only candidate for the cell r3c2.
74. The value F is the only candidate for the cell r3c14.
75. The value 9 is the only candidate for the cell r5c3.
76. The value 3 is the only candidate for the cell r8c16.
77. The value 9 is the only candidate for the cell r8c15.
78. The value 1 is the only candidate for the cell r10c3.
79. The value F is the only candidate for the cell r13c10.
80. The value 0 is the only candidate for the cell r1c15.
81. The value 4 is the only candidate for the cell r3c5.
82. The value D is the only candidate for the cell r4c13.
83. The value 4 is the only candidate for the cell r6c14.
84. The value F is the only candidate for the cell r6c15.
85. The value E is the only candidate for the cell r7c14.
86. The value D is the only candidate for the cell r7c16.
87. The value 2 is the only candidate for the cell r8c2.
88. The value 6 is the only candidate for the cell r8c3.
89. The value 7 is the only candidate for the cell r8c4.
90. The value B is the only candidate for the cell r8c13.
91. The value E is the only candidate for the cell r9c3.
92. The value C is the only candidate for the cell r9c14.
93. The value D is the only candidate for the cell r11c3.
94. The value 1 is the only candidate for the cell r11c15.
95. The value 2 is the only candidate for the cell r12c13.
96. The value A is the only candidate for the cell r12c16.
97. The value D is the only candidate for the cell r13c11.
98. The value 3 is the only candidate for the cell r13c15.
99. The value 1 is the only candidate for the cell r14c10.
100. The value 8 is the only candidate for the cell r15c14.
101. The value 5 is the only candidate for the cell r15c16.
102. The value F is the only candidate for the cell r16c2.
103. The value A is the only candidate for the cell r16c3.
104. The value 0 is the only candidate for the cell r16c10.
105. The value 9 is the only candidate for the cell r16c13.

 9 1 4 6 | F D E 5 | 2 7 A 8 | C 3 0 B
 3 D B C | 2 7 0 8 | E 5 F 1 | 4 6 A 9
 A 7 2 0 | 4 1 6 9 | C D 3 B | 5 F E 8
 F 5 8 E | A B 3 C | 9 4 6 0 | D 2 7 1
---------+---------+---------+--------
 B E 9 A | C 3 F 6 | D 8 5 4 | 1 0 2 7
 0 8 3 D | E 5 9 7 | B 2 1 6 | A 4 F C
 5 C F 1 | B A 4 2 | 7 9 0 3 | 8 E 6 D
 4 2 6 7 | 1 8 D 0 | F E C A | B 5 9 3
---------+---------+---------+--------
 7 B E 4 | 6 2 8 1 | A 3 9 D | F C 5 0
 2 A 1 3 | 5 F C D | 0 B 4 7 | 6 9 8 E
 C 9 D 8 | 0 E A B | 5 6 2 F | 3 7 1 4
 6 0 5 F | 9 4 7 3 | 1 C 8 E | 2 B D A
---------+---------+---------+--------
 E 4 C 9 | 8 0 B A | 6 F D 5 | 7 1 3 2
 D 6 0 2 | 3 9 5 4 | 8 1 7 C | E A B F
 1 3 7 B | D 6 2 F | 4 A E 9 | 0 8 C 5
 8 F A 5 | 7 C 1 E | 3 0 B 2 | 9 D 4 6


[Lardarse]

Do you mean to day that this puzzle, that looks very complicated, can be reduced to just 11 hidden singles and 94 naked singles ???

Not sure if I'd want an X-wing on a 16, but pairs (both types) would be nice...