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| therose
| | Joined: 21 Mar 2006 | | Posts: 1 | | : | |
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 Posted: Wed Mar 22, 2006 11:08 am Post subject: Small bug in Simple Sudoku program or ....? |
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Please consider the following partly filled in puzzle:
(cutting and pasting from the Simple Sudoku program)
| Code: |
*-----------*
|.6.|.17|.8.|
|...|829|6.4|
|..8|..6|..2|
|---+---+---|
|...|..2|...|
|.7.|...|.63|
|.1.|.8.|7..|
|---+---+---|
|4..|..3|...|
|.9.|..1|...|
|..7|2.8|4..|
*-----------*
*-----------*
|.6.|417|.8.|
|...|829|6.4|
|.48|..6|..2|
|---+---+---|
|.8.|..2|.4.|
|.7.|1..|863|
|.1.|.8.|72.|
|---+---+---|
|42.|..3|..8|
|89.|.41|2.7|
|..7|2.8|4..|
*-----------*
*--------------------------------------------------------------------*
| 2359 6 2359 | 4 1 7 | 359 8 59 |
| 1357 35 135 | 8 2 9 | 6 1357 4 |
| 13579 4 8 | 35 35 6 | 1359 13579 2 |
|----------------------+----------------------+----------------------|
| 3569 8 3569 | 35679 35679 2 | 159 4 159 |
| 259 7 2459 | 1 59 45 | 8 6 3 |
| 3569 1 34569 | 3569 8 45 | 7 2 59 |
|----------------------+----------------------+----------------------|
| 4 2 156 | 5679 5679 3 | 159 159 8 |
| 8 9 356 | 56 4 1 | 2 35 7 |
| 1356 35 7 | 2 569 8 | 4 1359 1569 |
*--------------------------------------------------------------------*
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if you look at the the middle block (block 5) there are naked pair's (i.e. the 45's) in R5C6 and R6C6 and hence the other 5's in this block should be excluded (the 4's are not present). However if I look at the possible
candidates in this block the 5's are included (you can't however fill them in because the program reponds with an invalid move). My question is, is this a bug, or should I turn on off some other option, or ???
Thanks for looking at this. |
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| Ruud
Site Admin
 | | Joined: 17 Sep 2005 | | Posts: 708 | | : | | Location: Netherlands |
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| Posted: Wed Mar 22, 2006 12:45 pm Post subject: |
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It is not a bug.
Simple Sudoku, like most Sudoku programs, will only eliminate candidates automatically that are already placed in row, column or box. The 4's are present in columns 4 and 5, that is why they are eliminated.
You should eliminate the 5's yourself. It is part of the game that we call Sudoku.
Ruud.
_________________
Meet me at sudocue.net |
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