Search found 198 matches

by david mcneill
Tue 14 Sep, 2021 11:00 pm
Forum: Puzzle Competitions
Topic: UKPA Yajilin Contest (10 Sep - 13 Sep)
Replies: 15
Views: 1983

Re: UKPA Yajilin Contest (10 Sep - 13 Sep)

I was well out of my depth here. Can't remember solving much logically during the test apart from the first Look-Air puzzle. The second Look-Air puzzle was also enjoyable, but that was afterwards. I was able to solve everything eventually using a combination of pen (for certainties) and pencil (for ...
by david mcneill
Mon 23 Aug, 2021 12:28 pm
Forum: Puzzle Competitions
Topic: UKPA Yajilin Contest (10 Sep - 13 Sep)
Replies: 15
Views: 1983

Re: UKPA Yajilin Contest (10 Sep - 13 Sep)

Sam, In the rules for Look-Air Yajilin, "the total number of distinct squares" is possibly open to misinterpretation. I briefly wondered if it meant "the number of distinct square sizes" e.g. the intended rule is that two single-celled black squares separated by a 4-cell black sq...
by david mcneill
Fri 20 Aug, 2021 7:46 pm
Forum: Puzzle Competitions
Topic: UK Puzzle League 2021-2022
Replies: 2
Views: 703

Re: UK Puzzle League 2021-2022

I thought I would be relegated and have to live off the parachute payment. However, happy to accept the higher revenues in Division A for at least one more season.
by david mcneill
Fri 20 Aug, 2021 7:42 pm
Forum: Announcements
Topic: UKPA Yajilin Contest (10 Sep - 13 Sep)
Replies: 1
Views: 1121

Re: UKPA Yajilin Contest (10 Sep - 13 Sep)

Looks good Sam. Well done on organising. Hope to try these out.
by david mcneill
Thu 17 Jun, 2021 7:17 am
Forum: Announcements
Topic: Results: 2021 UK Sudoku Championship
Replies: 3
Views: 2126

Re: Results: 2021 UK Sudoku Championship

Yes, a lovely set of puzzles by Sam, maintaining the exceptionally high standards of the UKSC. I enjoyed the puzzles even more after the event. The Odd/Even had a very nice solving path which I missed during the competition. The solving paths in both the Diagonal and the Killer were beautiful. But t...
by david mcneill
Fri 11 Jun, 2021 12:41 pm
Forum: Announcements
Topic: UKPA Monday evening Zoom drop-ins
Replies: 37
Views: 8658

Re: UKPA Monday evening Zoom drop-ins

At the risk of intertwining quite different threads (see Deuteronomy 22:11), it was the contents that fell short of the mark.
by david mcneill
Tue 08 Jun, 2021 9:30 am
Forum: General Puzzle Discussions
Topic: Classic sudoku speed
Replies: 8
Views: 3111

Re: Classic sudoku speed

I think one largely unspoken factor in classic Sudoku speed-solving is knowing when to start guessing and in having a good system of keeping track of tentative solving chains. Guessing isn't usually as beneficial in variants but is still an important last resort. I know on CtC there is ongoing bante...
by david mcneill
Tue 08 Jun, 2021 9:02 am
Forum: Announcements
Topic: UKPA Monday evening Zoom drop-ins
Replies: 37
Views: 8658

Re: UKPA Monday evening Zoom drop-ins

Sorry Tom.

I wasn't available to join you last night. Under instructions to augment my wardrobe.
by david mcneill
Wed 26 May, 2021 7:25 pm
Forum: Announcements
Topic: UKPA Monday evening Zoom drop-ins
Replies: 37
Views: 8658

Re: UKPA Monday evening Zoom drop-ins

I'm trying to join. Please let me know if there's any change of plan.
by david mcneill
Thu 20 May, 2021 1:22 pm
Forum: Puzzle Competitions
Topic: UKPA Masyu Contest 14 May - 19 May 2021
Replies: 16
Views: 5530

Re: UKPA Masyu Contest 14 May - 19 May 2021

My first attempt to set a Masyu contest. Delighted so many took part. Just over 100 competitors, of whom 42 got all the puzzles correct within the time. I was nervous beforehand about possible answer key errors and there were no fewer than 17 puzzlers who submitted answers for all 15 puzzles but mad...
by david mcneill
Sun 16 May, 2021 11:52 am
Forum: Puzzle Competitions
Topic: UKPA Masyu Contest 14 May - 19 May 2021
Replies: 16
Views: 5530

Re: UKPA Masyu Contest 14 May - 17 May 2021

Having become aware that some puzzlers have been having difficulty registering, I have extended the competition deadline by 48 hours. This means that solutions must be submitted no later than 11pm BST on Wednesday 19 May. The results of the competition will be published at 2pm on Thursday 20 May. I ...
by david mcneill
Tue 11 May, 2021 8:30 am
Forum: General Puzzle Discussions
Topic: Monday Evening UKPA puzzle drop-ins
Replies: 10
Views: 4011

Re: Monday Evening UKPA puzzle drop-ins

Sorry, I didn't catch this message. I wasn't free last night anyway. I'll try to join on another occasion. I'm a bit uncomfortable discussing the Sudoku and Puzzle GPs in my role as test solver. Definitely uncomfortable discussing my own Masyu contest. But there may be other stuff.
by david mcneill
Fri 07 May, 2021 10:10 am
Forum: Puzzle Competitions
Topic: UKPA Masyu Contest 14 May - 19 May 2021
Replies: 16
Views: 5530

Re: UKPA Masyu Contest 14 May - 17 May 2021

Sam,

Thanks for the question. The constraint in No Touch Masyu only applies to orthogonally adjacent cells. Unvisited cells are allowed to be diagonally adjacent. I had seen the name previously applied to puzzles with the same rule set. Hope there's no confusion.

David.
by david mcneill
Wed 05 May, 2021 7:22 am
Forum: Puzzle Competitions
Topic: UKPA Masyu Contest 14 May - 19 May 2021
Replies: 16
Views: 5530

UKPA Masyu Contest 14 May - 19 May 2021

This is the discussion thread for the upcoming UKPA Masyu Contest. UK and international competitors are welcome. Dates: Friday 14 May 2021 - Monday 17 May 2021 Duration: 90 minutes Puzzles: 15 puzzles, including 4 standard Masyu, 1 large Masyu and 2 each of 5 Masyu variants Instruction booklet: post...
by david mcneill
Sun 21 Mar, 2021 12:21 pm
Forum: Puzzle Competitions
Topic: Divisions A and B 2020-2021
Replies: 68
Views: 32396

Re: Divisions A and B 2020-2021

Probably won't (try to) solve the Saturday puzzle until tomorrow. I had a few nightmares already this week. The Ripple Loop turned out to be very hard and I didn't give myself a long enough window to solve it. Had to return to it over an hour later. The Magic Snail was another disaster as I didn't k...
by david mcneill
Wed 03 Mar, 2021 2:08 pm
Forum: Puzzle Competitions
Topic: UKPA Skyscrapers Contest 25 February - 2 March 2021
Replies: 14
Views: 8537

Re: UKPA Skyscrapers Contest 25 February - 2 March 2021

The results of the UKPA Skyscrapers contest are out. Congratulations to the 14 competitors who submitted correct solutions to all the puzzles. Ridiculously good solving from the Voigt brothers. Bragging rights to Roland on this occasion. Endo Ken completed the podium places but spare a thought for T...
by david mcneill
Thu 25 Feb, 2021 8:52 am
Forum: Puzzle Competitions
Topic: UKPA Skyscrapers Contest 25 February - 2 March 2021
Replies: 14
Views: 8537

Re: UKPA Skyscrapers Contest 25 February - 2 March 2021

Just a quick reminder that the UKPA Skyscrapers Contest is about to start. It's open right through to next Tuesday. Good luck to everybody planning to take part. Hoping for lots of happy finishers. Please don't discuss the actual puzzles until the contest is over.
by david mcneill
Wed 10 Feb, 2021 9:30 pm
Forum: Puzzle Competitions
Topic: Divisions A and B 2020-2021
Replies: 68
Views: 32396

Re: Divisions A and B 2020-2021

Well done Freddie and Neil. I hate loop puzzles and this was one of the most miserable experiences I have had in a long time. Like Adam and Matthew, I have no idea what is going on with a lot of the puzzles. Some I only solved by pure luck e.g. the funny Country Road one. The remaining puzzles are i...
by david mcneill
Wed 10 Feb, 2021 8:25 pm
Forum: Puzzle Competitions
Topic: UKPA Skyscrapers Contest 25 February - 2 March 2021
Replies: 14
Views: 8537

UKPA Skyscrapers Contest 25 February - 2 March 2021

This is the discussion thread for the upcoming UKPA Skyscrapers Contest. UK and international competitors are welcome. Because there is a Puzzle GP round on the same weekend, the competition window is slightly wider than usual. Dates: Thursday 25 February 2021 - Tuesday 2 March 2021 Duration: 2 hour...
by david mcneill
Wed 27 Jan, 2021 9:56 am
Forum: Puzzle Competitions
Topic: 2021 German Sudoku Qualifier (22.-25.01.21)
Replies: 7
Views: 5345

Re: 2021 German Sudoku Qualifier (22.-25.01.21)

I thought Mark and I had both done very well. But kudos to Sam and Tom for speedy test-solving. There were some great puzzles in the set. I particularly liked how the Average Arrow solved as I was dreading it beforehand. I struggled timewise with some of the standard variants - particularly Antiknig...
by david mcneill
Fri 11 Dec, 2020 12:14 pm
Forum: General Puzzle Discussions
Topic: Some puzzles for your solving pleasure
Replies: 27
Views: 30144

Re: Some puzzles for your solving pleasure

Sam, the one with the 123s on the diagonal.
by david mcneill
Wed 09 Dec, 2020 2:45 pm
Forum: General Puzzle Discussions
Topic: 8x8 Sudoku variant - Help required please
Replies: 5
Views: 5143

Re: 8x8 Sudoku variant - Help required please

This is certainly possible. It is not at all a difficult constraint to satisfy. I have found a solution in under 5 minutes.
by david mcneill
Tue 01 Dec, 2020 3:04 pm
Forum: General Puzzle Discussions
Topic: Some puzzles for your solving pleasure
Replies: 27
Views: 30144

Re: Some puzzles for your solving pleasure

I also enjoyed these. I forced myself to solve them logically. Very slow on one puzzle where the penny didn't drop for a while. Another puzzle was a work of pure evil - right up my street.
by david mcneill
Thu 02 Jul, 2020 7:27 am
Forum: Announcements
Topic: Results: 2020 UK Puzzle Championship
Replies: 7
Views: 13555

Re: Results: 2020 UK Puzzle Championship

Neil,

I set one of those at the airport. Just replace 6 by N where N is the size of the grid. It works quite well for N equals 7 or 8. I didn't go any further than that. I tried to set a puzzle called ALAN! but that wasn't working out too well.
by david mcneill
Thu 18 Jun, 2020 2:51 pm
Forum: Announcements
Topic: Results: 2020 UK Sudoku Championship
Replies: 2
Views: 7909

Re: Results: 2020 UK Sudoku Championship

Thanks to Tom and Sam for an outstanding set of Sudokus. Hard to fault any of them, but my favourite was the Diagonal. Had to solve it again afterwards to fully appreciate the lovely logic.