Search found 32 matches

by AndreyBogdanov
Fri 13 Feb, 2015 11:07 pm
Forum: Puzzle Links
Topic: Sudoku duel
Replies: 8
Views: 10592

Re: Sudoku duel

Thank you for playing and commenting. I'm planning to continue improvements and have a long list of desirable features. I agree about small chat and list of currently online players. Right now such list is not so interesting because there are too few players there. But if there number grows it will ...
by AndreyBogdanov
Tue 04 Mar, 2014 9:29 am
Forum: Puzzle Links
Topic: croco-puzzle
Replies: 696
Views: 429404

Re: croco-puzzle

today's answer code was a little misleading. I really like new format of crocopuzzle, but my carelessness with answer keys makes my crazy. I'm regularly forgoting to read answer key before start solving and usually put answer as I thought it should be. Only after "Fehlversuch" I lunch google transl...
by AndreyBogdanov
Tue 05 Jun, 2012 5:33 am
Forum: Puzzle Competitions
Topic: Russian Puzzle Championship (23 June 2012)
Replies: 1
Views: 3504

Re: Russian Puzzle Championship (23 June 2012)

Alan, thank for posting announcement here. [I presume "Write to Olga..." only applies to Russian participants] This is not only for Russians. If any non-Russian puzzler want to participate in onsite championship, then welcome. Of course championship hold in Russian language but English translation o...
by AndreyBogdanov
Mon 19 Mar, 2012 1:15 pm
Forum: General Puzzle Discussions
Topic: Only Connect
Replies: 9
Views: 9194

Re: Only Connect

I like it.
Only there is a mistape in the puzzle - two numbers 45. I think there should be 78 instead one of them.
by AndreyBogdanov
Wed 12 Oct, 2011 6:36 pm
Forum: Puzzle Competitions
Topic: 2011 24 Hour
Replies: 10
Views: 5501

Re: 2011 24 Hour

I couldn't find exact information about 24 HPC at the WPC-site but found it at the facebook.
by AndreyBogdanov
Tue 04 Oct, 2011 1:22 pm
Forum: Puzzle Competitions
Topic: Diogen IPST. 23-30 September 2011
Replies: 8
Views: 5229

Re: Diogen IPST. 23-30 September 2011

PuzzleScot wrote:There were a couple of problems in the optimisers.
Riad worries about this very much. He cannot decide what to do with puzzle 10. The first variant is to consider results as final and the second is to give maximum points for the solutions with only one king and 52 cells.
by AndreyBogdanov
Sat 09 Apr, 2011 7:29 am
Forum: Puzzle Competitions
Topic: Variations Contest
Replies: 12
Views: 6504

Re: Variations Contest

The next variation Contest - Scrabble Variation will be held at April 23. Conditions are the same - fixed start time and two hours for solving. Instructions will be posted later.
by AndreyBogdanov
Fri 01 Apr, 2011 4:24 pm
Forum: Puzzle Competitions
Topic: April IPST (1-9 April 2011)
Replies: 2
Views: 3010

Re: April IPST (1-9 April 2011)

Alan, thank you for posting an announecement . I forgot my password and couldn't post it at time.
And epseciall thanks for correcting my typos in it. I used old email as pattern and miss some old data there.
by AndreyBogdanov
Tue 08 Mar, 2011 1:17 pm
Forum: Puzzle Competitions
Topic: Beijing International Sudoku Tournament (19-22 May 2011)
Replies: 45
Views: 46941

Re: Beijing International Sudoku Tournament May 19-22

PuzzleScot wrote:Apologies
Don't worry. I don't know about safety, but I can't recommend Aeroflot for flying. Theirs service (especially in Sheremetievo) is not very good.
by AndreyBogdanov
Mon 07 Mar, 2011 5:30 pm
Forum: Puzzle Competitions
Topic: Beijing International Sudoku Tournament (19-22 May 2011)
Replies: 45
Views: 46941

Re: Beijing International Sudoku Tournament May 19-22

PuzzleScot wrote:you'd probably need good insurance, and parachute and something to sit on...
I see you have high opinion about Russian airlines :)
by AndreyBogdanov
Tue 01 Mar, 2011 6:59 pm
Forum: Puzzle Competitions
Topic: Variations Contest
Replies: 12
Views: 6504

Re: Variations Contest

Andrey, if you want to, you are more than welcome to host future variations contests on the UKPA website. Thank you for invitation. Of course flexible time is more modern, but this series is devoted to jubilee of diogen site and it should be hosted there. I hope these contests are not the last for ...
by AndreyBogdanov
Fri 25 Feb, 2011 6:05 am
Forum: Puzzle Competitions
Topic: Variations Contest
Replies: 12
Views: 6504

Re: Variations Contest

Encrypted puzzle file is uploaded now: http://diogen.h1.ru/pdf/yin-yang_puzzles.pdf
by AndreyBogdanov
Sat 12 Feb, 2011 9:57 am
Forum: Puzzle Competitions
Topic: Variations Contest
Replies: 12
Views: 6504

Re: Variations Contest

Now instructions for the second contest are available. Contest will be held at Saturday February 26 from 16:00 till 18:00. Participants could register here.
This wil be Yin-Yang Variations Contest. I hope puzzles will be not so tough as previous.
by AndreyBogdanov
Fri 07 Jan, 2011 9:07 am
Forum: Puzzle Competitions
Topic: Variations Contest
Replies: 12
Views: 6504

Variations Contest

Happy New Year to all! There are a lot of sudoku variation contests now. But I do not like sudoku very much and think other classic could be a good base for variations too. So I'm planning to provide a series of Variations Contests. Each contest of the series will be devoted to one well-known puzzle...
by AndreyBogdanov
Tue 30 Nov, 2010 6:42 pm
Forum: Puzzle (incl. Sudoku) Rules & Tips
Topic: What is sudoku?
Replies: 12
Views: 21039

Re: What is sudoku?

Unless there are any objections, I will merge the 2 topics... My post was not a complaint. I think it's really interesting and important question. I think in future we could divide puzzlesport to some "events" - to have different championsips for different events and one "absolute championship" (as...
by AndreyBogdanov
Tue 30 Nov, 2010 5:06 pm
Forum: Puzzle Competitions
Topic: 11th 24-Hour Puzzle Championship (Budapest, 26-28 Nov)
Replies: 15
Views: 11532

Re: 11th 24-Hour Puzzle Championship (Budapest, 26-28 Nov)

What time does the 24 hours run from and until? It starts at Saturday 10:30AM and ends at Sunday 10:30AM. How does everyone cope with the tiredness? It's interesting point. I could describe my feeling. At begining I was acting as usual - solving puzzles, looking to result, worring about my (and opp...
by AndreyBogdanov
Tue 30 Nov, 2010 5:48 am
Forum: Puzzle (incl. Sudoku) Rules & Tips
Topic: What is sudoku?
Replies: 12
Views: 21039

What is sudoku?

The first reflection after looking at a phrase "Standard puzzles, and their variants have their own separate forum area." is - What is sudoku? Which puzzle (I hope we understand what is puzzle :) ) could be named sudoku? And which could not. What is general rule for sudoku? I'm sure about some "magi...
by AndreyBogdanov
Mon 11 Oct, 2010 1:45 pm
Forum: Puzzle Competitions
Topic: Bulgarian Puzzle Championships 2010
Replies: 13
Views: 7773

Re: Bulgarian Puzzle Championships 2010

5. Double Bomb Sudoku - Mark 2 Bombs in each row, col, and section so that bombs are not touching (diagonal touch ok). Complete the grid as a sudoku using numbers 1-6 What's the rule on the first one - is it just rows and columns, or do you have to put in the the boundaries (which would seem a lot ...
by AndreyBogdanov
Mon 27 Sep, 2010 9:42 am
Forum: Puzzle Competitions
Topic: IPST September 2010
Replies: 27
Views: 16539

Re: IPST September 2010

david mcneill wrote:However, where did you find these links?
At the page http://diogen.h1.ru/cgi-bin/contest/start.pl there are links to all finished contests. Now the page with results for all contest is shown. Clicking by the name of any participant you could see his answers.
by AndreyBogdanov
Fri 24 Sep, 2010 7:54 am
Forum: General Puzzle Discussions
Topic: Puzzles to Inspire Youngsters
Replies: 39
Views: 19062

Re: Puzzles to Inspire Youngsters

There was too late yesterday and I was lazy to write long post. Here is some comment. Archive contains four files. puzzles.pdf 1. Sudoku - standard sudoku 1-5 2. Battleships with small fleet (one 3-cells, two 2-cells and three 1-cell ships) 3. Arithmetics - write digits 1-9 (one time each) to satisf...
by AndreyBogdanov
Thu 23 Sep, 2010 7:54 pm
Forum: General Puzzle Discussions
Topic: Every Second Turn and Uniqueness
Replies: 10
Views: 9073

Re: Every Second Turn and Uniqueness

drsteve wrote:Sorry Elliot, but I think there's two solutions to it. I could be wrong though. Second opinion?
You are right, Steve. Both solutions are in the picture.
by AndreyBogdanov
Thu 23 Sep, 2010 6:50 pm
Forum: General Puzzle Discussions
Topic: Puzzles to Inspire Youngsters
Replies: 39
Views: 19062

Re: Puzzles to Inspire Youngsters

Here is a zip-file with four sets (I gave them for 45 minutes each).
These files contain grids only (and puzzle names in Russian). Look them - which are interesting.
I also could send instructions with examples and answers. Write me to bay73_at_mail.ru.
by AndreyBogdanov
Thu 23 Sep, 2010 6:11 pm
Forum: General Puzzle Discussions
Topic: Puzzles to Inspire Youngsters
Replies: 39
Views: 19062

Re: Puzzles to Inspire Youngsters

drsteve wrote:Time to think of some new varieties for next time - maybe I might have a go at the railway one, as that's accessible.
I provided some small competitions for children (of the same ages - 9-13) this summer - I could send you the files if you were interested.
by AndreyBogdanov
Thu 23 Sep, 2010 6:04 pm
Forum: General Puzzle Discussions
Topic: Numberlink and Uniqueness
Replies: 13
Views: 11936

Re: Numberlink and Uniqueness

What would be more interesting is turning this into a sufficient (rather than necessary condition) for #S=1. That is to say, if #S>1, then there exists an element of S such that some strand occupies a 2X2 box. Equivalently, (if S is non-empty and)if there are no elements of S such that a strand occ...