Search found 113 matches
- Fri 07 Feb, 2020 11:34 pm
- Forum: Puzzle Competitions
- Topic: German Sudoku Qualifiers 2020
- Replies: 0
- Views: 3417
German Sudoku Qualifiers 2020
The DSM qualifiers are running this weekend and, as usual, they are open to international participation: https://logic-masters.de/DSM/2020/qualifikation.php If you do take part, do one better than me and make sure there is ink in your printer before starting the contest. I've just had to spend 2 hou...
- Tue 04 Feb, 2020 7:24 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
I sent you a PM, Adam.
- Tue 04 Feb, 2020 1:12 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
[Edit - how interesting, you used exactly the same pattern of givens I did for the windoku. Getting a windoku down to 16 certainly was not easy] It would seem so! If you look closely, I used the same "boxes" pattern for the diagonals too. But I thought it would look silly if there were four puzzles...
- Tue 04 Feb, 2020 11:22 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
And after guessing multiple layers deep through the first 5 puzzles, I ditched the 6th only to find out after the test that it was, indeed, the easiest (at least for me). The Japanese community in the twittersphere seem to more or less agree. I was surprised by the order that the Classics ended up ...
- Tue 04 Feb, 2020 9:28 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
I'm glad you enjoyed the round! I knew the Hidden Clone was a bit unusual, but ultimately I liked it too much not to submit it, and Nikola also felt reluctant not to include it. I at least made sure to construct it in such a way that it was still a decent Sudoku after the start, even if the start it...
- Tue 04 Feb, 2020 7:44 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
The preliminary results are available, with the UK top 3 as follows: 19. Tom Collyer - 509 50. Jeremy Kong - 384 73. Heather Mitchell - 336 A strong performance by Tom, slotting in just above the 8 people who solved everything but the Hidden Clone. The overall winner was Tiit Vunk, who at 63 minutes...
- Thu 30 Jan, 2020 3:21 pm
- Forum: Puzzle Competitions
- Topic: Puzzle Ramayan - 2020
- Replies: 13
- Views: 9151
Re: Puzzle Ramayan - 2020
A good UK showing, with 6 of us finishing the full set. Our top 3:
16. Neil Zussman - 126.1 (63:53)
39. Freddie Hand - 113 (77:01)
44. James McGowan - 106.8 (83:13)
16. Neil Zussman - 126.1 (63:53)
39. Freddie Hand - 113 (77:01)
44. James McGowan - 106.8 (83:13)
- Mon 27 Jan, 2020 3:18 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
My "for example" became "for the example" in Nikola's wording which I was worried would lead people to believe that something about the rules applied only to the example puzzle and not to the competition puzzle. A new version has been produced using the phrase "for instance" instead - just waiting o...
- Sun 26 Jan, 2020 10:33 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
Re: WPF Sudoku GP 2020
The instructions for my round are now live at https://gp.worldpuzzle.org/content/instruction-booklet Nikola has introduced a linguistic quirk into the instructions for Puzzle 13 which I mentioned to him a while ago but doesn't appear to have been fixed. I've asked for it to be updated, so there will...
- Tue 21 Jan, 2020 1:02 pm
- Forum: Puzzle Competitions
- Topic: WPF Puzzle GP 2020
- Replies: 67
- Views: 34211
Re: WPF Puzzle GP 2020
Similar story to Tom for me - I ignored some puzzles during the round which it turned out afterwards would have been easy points in the bank (looking at Fillomino and Nanro). My two mistakes were both me entering the row above the keyed row, but luckily on low-pointers so I only lost ~40 points over...
- Wed 15 Jan, 2020 8:05 pm
- Forum: Puzzle Competitions
- Topic: Sudoku Mahabharat 2020
- Replies: 7
- Views: 6851
Re: Sudoku Mahabharat 2020
The first round ended today. Top 3 from the UK all finished the test with plenty of time to spare: 29. Tom Collyer - 133.2 (56:47) 41. Sam Cappleman-Lynes - 125.5 (64:28) 42. Mark Goodliffe - 125.3 (64:43) Notable others include the now-disqualified Rajnesh Kumari who apparently solved all 18 puzzle...
- Fri 10 Jan, 2020 12:13 pm
- Forum: Puzzle Competitions
- Topic: Sudoku Mahabharat 2020
- Replies: 7
- Views: 6851
Sudoku Mahabharat 2020
The first contest has just started today and will be open until the 14th: http://logicmastersindia.com/SM/202001/. I for one am interested to try these brutal 6x6 classics that are worth 2 points instead of the usual 1 

- Wed 01 Jan, 2020 9:44 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP 2020
- Replies: 37
- Views: 22581
WPF Sudoku GP 2020
The 2020 edition of the Sudoku GP kicks off this weekend with a round from Croatia. The instructions are available at https://gp.worldpuzzle.org/content/instruction-booklet
Have fun everyone!
Have fun everyone!
- Thu 12 Sep, 2019 8:32 am
- Forum: WPF Sudoku Technical Discussion forum
- Topic: What is a Sudoku? Report general consultation
- Replies: 10
- Views: 11659
Re: What is a Sudoku? Report general consultation
Tom, this is fantastic work - thank you. The pragmatic approach you propose makes a lot of sense to me, and I hope the WPF will take a similar view of it. On an initial reading, some points jumped out to me as perhaps needing an edit or some extra clarification. 1) "Cells must have a finite number o...
- Wed 24 Jul, 2019 1:41 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
Re: WPF Sudoku GP
Seeing a finned swordfish in a competitive scenario is highly impressive. Some would say "pointless", or "a waste of time". I know that a lot of solvers don't think that such logic has a place in speedsolving. But I've made the argument before that there are specific types of (finned) fish that are...
- Wed 24 Jul, 2019 6:16 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
Re: WPF Sudoku GP
Here you go James: viewtopic.php?f=5&t=1697
- Tue 23 Jul, 2019 1:00 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
Re: WPF Sudoku GP
I agree with you that the symmetric products sums is an awful variant, but its inclusion in this round was great for me. I must have looked in the right places very quickly because even though it was a 70+ pointer, I got it done in under 5 minutes. I also found a sneaky deduction on the Odd-Even whi...
- Tue 23 Jul, 2019 10:29 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
Re: WPF Sudoku GP
Preliminary results for Round 8: 13. Sam Cappleman-Lynes 721.7 44. Tom Collyer 525 60. Jeremy Kong 435 Leaving the top 3 UK in the final standings as: 29. Sam Cappleman-Lynes 3193.7 50. Tom Collyer 2805 66. Jeremy Kong 2504 ----------------------------------------------------------------------------...
- Mon 15 Jul, 2019 3:21 pm
- Forum: Puzzle (incl. Sudoku) Rules & Tips
- Topic: Arrows
- Replies: 6
- Views: 9548
Re: Arrows
Thanks Freddie and James, In a sense, I suppose that means the dismaying answer (on the whole) is that I'm not missing any amazing tricks - the techniques are roughly the ones I'm already using, I'm just not very good at them. Except that 5x5 trick which is nice to have in the back pocket! James, th...
- Sat 13 Jul, 2019 5:09 pm
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
- Fri 12 Jul, 2019 2:50 pm
- Forum: Puzzle Competitions
- Topic: The Times Sudoku Championship 2019 (or not)
- Replies: 3
- Views: 5978
Re: The Times Sudoku Championship 2019 (or not)
Full text of my email is as follows; Good afternoon, I am writing with regard to The Times Sudoku Championship, which you have attended in previous years. Following a review of this event, I regret to say that we have decided to discontinue the Sudoku Championship and, consequently, the event will n...
- Fri 12 Jul, 2019 8:42 am
- Forum: Puzzle (incl. Sudoku) Rules & Tips
- Topic: Arrows
- Replies: 6
- Views: 9548
Arrows
This section of the forum isn't too active, but hopefully I'll get some replies! So, some questions about Arrows puzzles: 1. How do you solve them? 2. How do you solve them quickly? 3. Any useful notation? I've attached an image of my solved copies of the two Arrows from this year's GP. The first I ...
- Thu 11 Jul, 2019 6:49 pm
- Forum: Puzzle Competitions
- Topic: The Times Sudoku Championship 2019 (or not)
- Replies: 3
- Views: 5978
The Times Sudoku Championship 2019 (or not)
I've just received an email saying that the Times Sudoku Championship has been discontinued, and as such will not run this year.
Shame.
Shame.
- Thu 11 Jul, 2019 6:34 am
- Forum: Puzzle Competitions
- Topic: WPF Sudoku GP
- Replies: 28
- Views: 29638
Re: WPF Sudoku GP
A second-worst round of 449 means I'd need to attain a new high score of 528 on Round 8 to break 3000 points. It's possible - I've had 3 scores of over 500 points already.
- Wed 10 Jul, 2019 6:29 pm
- Forum: Puzzle Competitions
- Topic: UK Sudoku Championship 2019 / WSC Qualification
- Replies: 11
- Views: 14660
Re: UK Sudoku Championship 2019 / WSC Qualification
Or alternatively spot that the 2s in box 4 eliminate it from the rest of C5 which gets you through the rest of the puzzle without ever needing to spot the trick in rows 3 and 4.
I guess I had about of a blind spot with this puzzle!
I guess I had about of a blind spot with this puzzle!