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| hobiwan
| | Joined: 11 Feb 2008 | | Posts: 83 | | : | |
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 Posted: Tue Feb 12, 2008 6:51 pm Post subject: |
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| Frank wrote: | | 1.. My browser FireFox 2.0.0.12 has a strange behaviour when it is activated under Linux/Ubuntu 7.10: columns are not vertically aligned, as shown below, while no problems arise under Windows-Xp. |
I don't have your configuration available, but from your picture it seems as if there was a problem with the font (digits are slightly wider than the rest). You should try another font. |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Wed Feb 13, 2008 6:58 am Post subject: |
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Thanks hobiwan
I've just ended to try the following combinations:
serif 16
sanserif 16
FreeMono 16
BitStream Vera Sans 16 and 20
and refreshing the page. No alignment appeared. Unfortunately, Ubuntu fonts don't include equally spaced characters, like Courier or Courier New. Thanks again. |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Wed Feb 13, 2008 9:43 am Post subject: |
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Trial $ Error grid in only two shots !!
Is it nice?
See the solution here:
http://img29.picoodle.com/img/img29/4/2/13/f_1615215m_49ea2f0.jpg
| Code: |
#
# Source: Puzzle Designer of `The Su Doku Assistant`(v1.9)
# seed 1615, 21 starting cells, 5 grade of difficulty
# symmetric grid
# (max.grade of diff.=6, often not for human minds!)
#
8 . .|. . .|. . 3
. 6 .|. 5 .|. 4 .
. . .|2 . 9|. . .
-----+-----+-----
. . 1|. . .|9 . .
. 2 .|. 4 .|. 6 .
. . 5|. . .|7 . .
-----+-----+-----
. . .|5 . 1|. . .
. 4 .|. 6 .|. 2 .
3 . .|. . .|. . 8
#
# ----- 1st Tree -----
# 3B3 (alias 3E3)
# |
# +-- 2G1 (alias 2B1) (mark ^)
# which reaches the target
#
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Sun Feb 17, 2008 9:04 pm Post subject: |
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A long discussion has been carried out here:
http://www.sudoku.org.uk/SudokuThread.asp?fid=4&sid=10069&p1=1&p2=10
It concerns the so-called extreme #71 grid
Here is my solution, reached in 4 nodes:
http://img37.picoodle.com/img/img37/4/2/17/f_extreme71m_974957e.jpg
| Code: |
2 . .|1 . 9|4 . .
. 8 .|. . 3|. . .
. . 7|. 8 .|. . .
-----+-----+-----
9 2 .|5 . .|. . .
6 . .|. . .|. . 1
. . .|. . 4|. 2 5
-----+-----+-----
. . .|. 2 .|8 . .
. . .|9 . .|. 7 .
. . 8|4 . 1|. . 3
#
# ----- 1st Tree -----
# 5G6 (alias 5C6) [contradiction]
# 5C6 definitive (circled)
#
# ----- 2nd Tree -----
# 7G6 (alias 7D6)
# |
# +-- 3H5 (alias 3E5) (mark ^) [contradiction]
# +-- 3E5 (mark o)
# |
# +-- 3C7 (alias 3D7) (mark ~) [contradiction]
# +-- 3D7 (squared mark)
# |
# +-- 3F3 (alias 3A3) (mark //) [contradiction]
# +-- 3A3 which solves the puzzle
#
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| gsf
| | Joined: 18 Aug 2005 | | Posts: 408 | | : | | Location: NJ USA |
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| Posted: Sun Feb 17, 2008 9:34 pm Post subject: |
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| Code: |
# ----- 1st Tree -----
# 5G6 (alias 5C6) [contradiction]
# 5C6 definitive (circled)
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where is the description of how you decided on { 5G6 5C6 } as the first move? |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Mon Feb 18, 2008 7:47 am Post subject: |
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| gsf wrote: | [code]
where is the description of how you decided on { 5G6 5C6 } as the first move? |
Simply in column 6, after logic moves:
C6 -> 56
D6 -> 67
G6 -> 567
At the failure of 5G6, 5C6 becomes valid and it has been circled in order to be distinguished from logical numbers (top-left angles).
Bye, Frank |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Wed Feb 20, 2008 3:58 pm Post subject: |
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Grid #12 from Glenn Fowler's huge database (sudoku section): FNBTXYW-1-constrained puzzle sample (100000)
URL: http://www.research.att.com/~gsf/
| Code: |
#
# 81-digit line #12
#
1......89..67....3....2....2......983..81..6.....4..17..8....3.6.15...4.94.6.....
#
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My solution is shown below and takes only one shot: 1C4 (alias 1G4), being in the same column 4: C4->19; F4->29; G4->129
http://img37.picoodle.com/img/img37/4/2/20/f_glenn12m_84e2090.jpg |
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| north55
| | Joined: 02 Dec 2006 | | Posts: 43 | | : | |
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| Posted: Fri Feb 22, 2008 4:04 am Post subject: |
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| Frank, if my roof leaks, if my car won't start, if my back hurts so much I cannot stand up.... I would never get a "guessor". If you would, well, goodbye. |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Fri Feb 22, 2008 5:25 am Post subject: |
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| north55 wrote: | | Frank, if my roof leaks, if my car won't start, if my back hurts so much I cannot stand up.... I would never get a "guessor". If you would, well, goodbye. |
Good luck |
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| Frank
| | Joined: 24 Jan 2008 | | Posts: 29 | | : | | Location: Italy |
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| Posted: Sat Feb 23, 2008 6:46 am Post subject: |
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| Code: |
+--------------------------------------------------+
| L A S T G R I D |
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| (one month of sudoku divertissment is enough!) |
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+--------------------------------------------------+
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The proposed puzzle is typical for understanding the main difference beetween brute force method and guess, as applied by me!
In fact, the choice of the initial value has the same importance of what happens in numerical analysis on dealing with Newton-Raphson iteration, in order to find the convergence to one root.
Probably, this grid is evaluated (through computer programs) as diabolic, nightmare, insane. Really, the appropriate choice of the initial guess goes to the target in only one shot, as shown here:
http://img26.picoodle.com/img/img26/4/2/22/f_2333215fm_88b6160.jpg
| Code: |
# Source: Puzzle Designer of `The Su Doku Assistant`(v2.08)
# seed 2333, 21 starting cells, 5 grade of difficulty
# symmetric grid (max.grade of diff.=6)
. . .|7 6 4|. . .
. 2 .|. 9 .|. 4 .
. . .|. . .|. . .
-----+-----+-----
. . 8|. . .|7 . .
. 4 7|. 2 .|6 5 .
. . 1|. . .|8 . .
-----+-----+-----
. . .|. . .|. . .
. 3 .|. 5 .|. 2 .
. . .|6 7 1|. . .
# 8G5 (alias 8C5) solves the puzzle
#
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For private contacts, please see my email address in one of my previous posts.
Best wishes, Frank |
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