Search found 923 matches

by detuned
Sun 30 Dec, 2018 3:26 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: READ ME FIRST: What is a Sudoku Committee
Replies: 28
Views: 2599

Re: READ ME FIRST: What is a Sudoku Committee

A provocative thesis: If we always change the classic Sudoku rules only minimally, after 1000 steps we come to the conclusion that Masyu is a Sudoku, because we can't overcome ourselves at any step to say "no". I'd like to explore this thesis a little more. Athletics is a loose collection of differ...
by detuned
Sun 30 Dec, 2018 3:16 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Subset Sudoku
Replies: 2
Views: 720

Re: Subset Sudoku

Thank you for the example - I've added the same poll to this as all the other examples in the forum.

The main controversial aspect to this variant as far as I can see is the use of repeated symbols.
by detuned
Sun 30 Dec, 2018 2:39 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Irregular Sudoku [New Example]
Replies: 1
Views: 823

Irregular Sudoku [New Example]

example-irregular.png In theory Irregular Sudoku can be defined so that the marked regions entirely overlap the rows or columns of the grid. This is not quite the case for this example, however a lot (not all) of the solving logic required for this puzzle effectively ignores the 3rd regional constr...
by detuned
Sun 30 Dec, 2018 1:03 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: READ ME FIRST: What is a Sudoku Committee
Replies: 28
Views: 2599

Re: READ ME FIRST: What is a Sudoku Committee

Hi Mephisto, thanks for your thoughtful post, there is plenty to unpack here. Firstly: I suggest that we should discuss basic principles in a first step and concrete puzzles in a second step. Does the use of "we" imply that you would like to contribute more meaningfully to the committee's work? My o...
by detuned
Sat 29 Dec, 2018 9:24 am
Forum: WPF Sudoku Technical Discussion forum
Topic: READ ME FIRST: What is a Sudoku Committee
Replies: 28
Views: 2599

Re: READ ME FIRST: What is a Sudoku Committee

A first tip would be to keep comments relevant to their example thread. The polls are something I noticed I could do with the forum. Like any good referenda, these are purely advisable and are there only to see if there are any particularly strong feelings one way or the other - they are absolutely ...
by detuned
Fri 28 Dec, 2018 10:33 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Very Hard Classic Sudoku [WSC 2010]
Replies: 10
Views: 1284

Very Hard Classic Sudoku [WSC 2010]

very hard classic [WSC 2010].png Source: 2010 WSC, Philadelphia. Whilst this is undeniably a Sudoku puzzle, its difficulty is the point of this discussion - it scores a diabolical grade of 494 at http://www.sudokuwiki.org/sudoku.htm. Note that very hard classic puzzles had also appeared at the WSC ...
by detuned
Fri 28 Dec, 2018 10:02 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Eightdirections Sudoku [WSC 2009]
Replies: 0
Views: 796

Eightdirections Sudoku [WSC 2009]

Eightdirections Sudoku [WSC 2009].png Source: 2009 WSC, Zilina This variant places far more emphasis on the placement of additional objects (i.e. the clued strings of numbers) into the grid, than it does the placement of numbers. The overlap of "grid packing" logic and "sudoku solving" logic may no...
by detuned
Fri 28 Dec, 2018 9:58 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Halloween Sudoku [WSC 2009]
Replies: 3
Views: 960

Halloween Sudoku [WSC 2009]

Halloween Sudoku [WSC 2009].png
Halloween Sudoku [WSC 2009].png (193.71 KiB) Viewed 960 times
Source: WSC 2009, Zilina.

The variant uses letters, rather than numbers, and additionally features repeated letters in rows, columns and 3x3 boxes.
by detuned
Fri 28 Dec, 2018 3:55 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Transparent Sudoku [WSC 2007]
Replies: 1
Views: 775

Re: Transparent Sudoku [WSC 2007]

On the other hand, the concept of this puzzle isn't a million miles away from Shape Sudoku

https://www.gmpuzzles.com/blog/2017/08/ ... yurekli-2/
by detuned
Fri 28 Dec, 2018 3:49 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Transparent Sudoku [WSC 2007]
Replies: 1
Views: 775

Transparent Sudoku [WSC 2007]

Screen Shot 2018-12-28 at 15.45.45.png
Screen Shot 2018-12-28 at 15.45.45.png (180.13 KiB) Viewed 775 times
Source: WSC 2007, Prague.

To solve this puzzle as a whole, not only must you solve a classic Sudoku puzzle, you also have to construct one.
by detuned
Fri 28 Dec, 2018 3:26 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Zigzag Sudoku [WSC 2007]
Replies: 2
Views: 839

Zigzag Sudoku [WSC 2007]

Screen Shot 2018-12-28 at 15.22.59.png Source: 2007 World Sudoku Championship, Prague The main thing to note with this puzzle is that it has two solutions, and that you have to find both of them. It is normally understood that a puzzle in competition should have exactly one intended solution, altho...
by detuned
Fri 28 Dec, 2018 3:20 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Duo Sudoku 8x8 [WSC 2009]
Replies: 0
Views: 816

Duo Sudoku 8x8 [WSC 2009]

Screen Shot 2018-12-28 at 15.15.06.png Source: 2009 World Sudoku Championship, Zilina If you wish to solve the puzzle, please ignore the left hand grid, which is simply an 8x8 Irregular Sudoku. The right hand grid is the puzzle in question. This puzzle was linked with another puzzle which I haven't...
by detuned
Fri 28 Dec, 2018 2:56 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: READ ME FIRST: What is a Sudoku Committee
Replies: 28
Views: 2599

READ ME FIRST: What is a Sudoku Committee

This forum has kindly been hosted by the UKPA for the purpose of the WPF's "What is a Sudoku?" committee. The committee was first set up in 2017, but failed to report. In 2018 I took on the lead for the committee and my intention is very much not to end in another failure. Whilst the question "What ...
by detuned
Fri 28 Dec, 2018 12:50 pm
Forum: WPF Sudoku Technical Discussion forum
Topic: Star Battle Sudoku [Grandmaster Puzzles]
Replies: 0
Views: 823

Star Battle Sudoku [Grandmaster Puzzles]

Screen Shot 2018-12-28 at 12.47.03.png Source: GMPuzzles https://www.gmpuzzles.com/blog/2018/12/star-battle-sudoku-by-thomas-snyder/ Is this a Sudoku? It strikes me that this puzzle occupies a bit of a grey area. - you could more awkwardly state the rules using 8's and 9's instead of stars to get a...
by detuned
Sun 09 Dec, 2018 3:47 pm
Forum: Puzzle Links
Topic: Dan Peake's Puzzlevent
Replies: 1
Views: 977

Dan Peake's Puzzlevent

https://danielpeake.com/blog1/puzzlevent/ So this is a collection more of "puzzle hunt" style puzzles - where there aren't any explicit instructions and part of the challenge of solving is working out exactly what it is that you are supposed to be doing in the first place. So not strictly culture ne...
by detuned
Tue 16 Oct, 2018 10:53 pm
Forum: General Puzzle Discussions
Topic: The Supercalculators documentary
Replies: 0
Views: 1225

The Supercalculators documentary

A very interesting documentary on the radio today - the parallels between this and the world puzzle championships I thought were remarkable. It also features Ken Wilshere! Alex Bellos heads to Germany to meet the supercalculators taking part in this year's Mental Calculation World Cup. Prepare to be...
by detuned
Sun 07 Oct, 2018 11:21 am
Forum: Puzzle Competitions
Topic: LMI contest: Sudoku Deja Vu
Replies: 3
Views: 1429

Re: LMI contest: Sudoku Deja Vu

Enjoyed this - just the two of us from the UK having a go so far, but definitely worth a go!
by detuned
Sat 29 Sep, 2018 4:52 pm
Forum: Puzzle Competitions
Topic: The Times Sudoku Championship 2018
Replies: 2
Views: 2075

Re: The Times Sudoku Championship 2018

This year's title goes to Mark! Good to see both old faces and new there :)
by detuned
Sat 15 Sep, 2018 10:01 pm
Forum: Puzzle Competitions
Topic: LMI contest: Enthralling Sudoku
Replies: 0
Views: 1313

LMI contest: Enthralling Sudoku

12 fairly standard variants in 90 minutes. I've just solved it, and would recommend to beginners and experienced hands alike

http://logicmastersindia.com/2018/09S2/
by detuned
Sat 25 Aug, 2018 5:12 pm
Forum: Puzzle Competitions
Topic: Puzzles at the Mind Sports Olympiad in London on Sunday
Replies: 31
Views: 19302

Re: Puzzles at the Mind Sports Olympiad in London on Sunday

Ken Wilshere there on 6 golds in 51st!

What were the formats like this year? Looks as if they've substituted killer sudoku in for kenken in the sudoku event, and then moved kenken in with "other puzzles". What was the variety like?
by detuned
Fri 17 Aug, 2018 8:13 pm
Forum: Puzzle Competitions
Topic: This weekend: Killers!
Replies: 1
Views: 1070

Re: This weekend: Killers!

Good luck with the contest Rob! I look forward to having a go at the other author's puzzles
by detuned
Fri 17 Aug, 2018 8:08 pm
Forum: Puzzle Competitions
Topic: Puzzles at the Mind Sports Olympiad in London on Sunday
Replies: 31
Views: 19302

Re: Puzzles at the Mind Sports Olympiad in London on Sunday

yes I did.

Unfortunately I don't think I'm going to be able to make it on Thursday :(
by detuned
Thu 26 Jul, 2018 11:48 am
Forum: Puzzle Competitions
Topic: PuzzleUp
Replies: 3
Views: 1828

PuzzleUp

This is something that I've looked at with half an eye in previous years - I know that Alan and James have as well. I don't think it'd be appropriate to discuss the puzzles publicly in the forums but perhaps if there's enough interest we can set up a mailing list Dear PuzzleUp Contenders, This year'...