JExocet Compendium

Advanced methods and approaches for solving Sudoku puzzles

JExocet Compendium

Postby David P Bird » Thu Mar 19, 2015 10:16 am

This a redrafting of the discoveries made by a number of contributors on the JExocet pattern made in the last two years. Most, but not all the findings have been gathered from the JE various threads, where by the nature of a discussion forum they are scattered and interspersed with side discussions of varying quality.

The work is presented as a series of 14 attached unprotected Open Office *.odt files. When opened, switch to web mode to turn off any pagination and adjust the zoom level if needed. The files aren't protected so once downloaded can be annotated and edited as required. We have all suffered the loss of reference pages on the web for various reasons and this approach should overcome that. If it is well received it could be extended to other subjects too.

Please consider how the subject has been handled more of a personal view rather than an official bible. Most of the original terms and treatments have been retained but those that didn't work so well (including many of my own) have been revised in an attempt to overcome their shortcomings. It is up to players to decide if these changes are improvements and are worth adopting or not, a path which should eventually lead to some form of consensus.

As I age, I'm aware that I can't maintain my concentration a subject for as long as in the past, and also that I've become more error-prone. That explains in part the time it's taken me, and also means I can't guarantee to respond quickly to any posts addressed to me. I apologise for any errors and omissions that have escaped proof reading.

Jason Lion informs me that document attachments to posts can be updated but the procedure is complicated and untested. This is why each document is contained in a different post. I intend to compile a list of any necessary factual corrections contributors spot and and implement them all together when they seem to be complete.

David PB
Attachments
01 JExocet Compendium.odt
(23.09 KiB) Downloaded 276 times
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2. Junior Exocet Definition

Postby David P Bird » Thu Mar 19, 2015 10:17 am

2. Junior Exocet Definition

02 Junior Exocet Definition v2b.odt
(28.81 KiB) Downloaded 11 times

[Edits]
Mar? 2016 Version 2: Typos corrected, incompatible base pairs section revised following comments received, minor rewording elsewhere.
Wed Apr 13 2016 Version 2a elimination rule 7 revised, locked member sub-type section revised.
Sat Mar 18 2017 Version 2b further typos corrected and minor re-wording.
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Last edited by David P Bird on Sat Mar 18, 2017 10:22 pm, edited 4 times in total.
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3. JE and SK Loop Combination

Postby David P Bird » Thu Mar 19, 2015 10:25 am

3. JE and SK Loop Combination

03 JE and SKLoop Combination v3.odt
(27.04 KiB) Downloaded 10 times

The original version of this file was based on a false conjecture that the relationships described were common to all combined SK Loop /JE2 combination puzzles. This firstly led to a seriously flawed solution to the Easter Monster and secondly to inadequate definitions of the derived inferences.

This new file is a complete re-write to overcome these faults. The Easter Monster puzzle is a special case where the SK Loop has two almost JE2 patterns with a common base digit that are both true but without extensive branching this cannot be proved. This is now briefly covered in a separate section 7.

Thanks are due to Gordon Fick for proof reading the original and raising some awkward questions and to Leren for extracting a selection of source puzzles for checking my theories.

David PB

[Edits]
Thu Mar 19 2015 v1 Original
Fri Apr 15 2016 v2 Typos corrected, some wording changes, material re-ordered
Sat Mar 18 2017 v3 Major re-write to correct errors, specimen puzzle changed.
.
Last edited by David P Bird on Sun Mar 19, 2017 7:41 pm, edited 3 times in total.
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4. Incompatible Base Pair Examples

Postby David P Bird » Thu Mar 19, 2015 10:26 am

4. Incompatible Base Pair Examples

04 Incompatible Base Pair Examples v2.odt
Version 2
(24.25 KiB) Downloaded 77 times

[Edit] Updated the copy of the revised description in the JE Definition file.
Last edited by David P Bird on Tue Apr 12, 2016 10:18 am, edited 1 time in total.
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5. JE2 Examples

Postby David P Bird » Thu Mar 19, 2015 10:31 am

5. JE2 Examples

05 JE2 Examples v2a.odt
(23.32 KiB) Downloaded 9 times

[Edits]
Thu Apr 07 2016 V2 Typos corrected, examples 2 & 3 improved
Sat Mar 18 2017 V2a Further typos corrected
.
Last edited by David P Bird on Sat Mar 18, 2017 10:35 pm, edited 2 times in total.
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6. JE+ Examples

Postby David P Bird » Thu Mar 19, 2015 10:32 am

6. JE+ Examples

06 JE+ Examples v2a.odt
(23.24 KiB) Downloaded 14 times

[Edits]
Thu Apr 21 2016 v2 Typos corrected, some re-wording and minor additions, further notes added to examples 2 & 3.
Sat Mar 18 2015 v2a Further typos corrected
.
Last edited by David P Bird on Sat Mar 18, 2017 10:38 pm, edited 5 times in total.
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7. JE3 Examples

Postby David P Bird » Thu Mar 19, 2015 10:34 am

7. JE3 Examples

07 JE3 Examples v2a.odt
(22.56 KiB) Downloaded 11 times

[Edits]
Fri Apr 08 2016 V2 First Example Extended
Sat Mar 18 2017 V2a Typos Corrected
.
Last edited by David P Bird on Sat Mar 18, 2017 10:41 pm, edited 2 times in total.
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8. JE4 Examples

Postby David P Bird » Thu Mar 19, 2015 10:35 am

8. JE4 Examples

08 JE4 Examples v2.odt
Version 2
(21.01 KiB) Downloaded 69 times

[Edit] Corrections: typos & faulty logic in Example 4, Examples solutions extended for #3 & #4
Last edited by David P Bird on Tue Apr 12, 2016 9:38 am, edited 1 time in total.
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9. Almost JE Examples

Postby David P Bird » Thu Mar 19, 2015 10:36 am

9. Almost JE Examples

09 Almost JE Examples v2a.odt
(24.66 KiB) Downloaded 7 times

[Edits]
Fri Apr 15 2016 v2 Minor wording changes, extra example 3b added
Sat Mar 18 2017 v2a Further re-wording
.
Last edited by David P Bird on Sat Mar 18, 2017 10:44 pm, edited 4 times in total.
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10. JE2 / SK Loop Examples

Postby David P Bird » Thu Mar 19, 2015 10:37 am

10. JE2 / SK Loop Examples

10 JE and SK Loop Combination Examples v3.odt
(24.01 KiB) Downloaded 9 times


[Edits]
Fri Apr 15 2016 v2 Typos corrected, examples duplicated from description file removed.
Sat Mar 18 2017 v3 Re-written to correspond with version 3 of the main file (No 3).
.
Last edited by David P Bird on Sat Mar 18, 2017 10:52 pm, edited 2 times in total.
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11. JE+ Extension Example

Postby David P Bird » Thu Mar 19, 2015 10:39 am

11. JE+ Extension Example
Attachments
11 JE+ Extension Example.odt
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12. JE1 (Single Target) Example

Postby David P Bird » Thu Mar 19, 2015 10:40 am

12. JE1 (Single Target) Example
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12 JE1 (Single Target) Example.odt
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13. JE (Locked Member) Examples

Postby David P Bird » Thu Mar 19, 2015 10:41 am

13. JE (Locked Member) Examples

13 JE (Locked Member) Examples v2.odt
Version 2
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[Edit] Description revised, final example extended.
.
Last edited by David P Bird on Wed Apr 13, 2016 6:07 pm, edited 1 time in total.
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14. Senior Exocet Example

Postby David P Bird » Thu Mar 19, 2015 10:42 am

14. Senior Exocet Example
Attachments
14 Senior Exocets.odt
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Re: JExocet Compendium

Postby SteveG48 » Thu Mar 19, 2015 6:11 pm

David, I hope some day to understand all this. In the meanwhile- Thank you!
Steve
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