2021 WPF Sudoku and Puzzle GPs

Information and discussion on Puzzle Competitions
Puzzle_Maestro
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Puzzle_Maestro » Wed 21 Apr, 2021 3:34 pm

That would break the 4-way clue.

eratosthenes
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by eratosthenes » Wed 21 Apr, 2021 3:34 pm

Thank you!

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Tue 27 Apr, 2021 10:43 am

Preliminary results for puzzle GP out although I don’t think much is going to change with errors and bonus this time round... I’m pretty chuffed to make the top 3 UK

2. Freddie Hand 798
8. James McGowan 674
23. Tom Collyer 571

Very strong UK results again... also making the top 50 are Sam and Neil, and a bit further back in the top 100 are Adam and Matthew

Puzzle_Maestro
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Puzzle_Maestro » Tue 27 Apr, 2021 12:02 pm

I purposely spent several extra seconds on each puzzle checking diligently, so I'm relieved that it paid off. Hopefully my error streak for this year has come to an end now...

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Sun 09 May, 2021 8:43 pm

It's worth mentioning that it's a sudoku GP weekend if you haven't already seen. If you finish up by tomorrow evening there's also a plan to host a video call for anyone who wants to chat about it: http://forum.ukpuzzles.org/viewtopic.php?f=3&p=16834

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Tue 11 May, 2021 1:15 pm

Some provisional results from the sudoku GP, which don’t look like they’ll change:

22. Sam Cappleman-Lynes 621.7
40. Tom Collyer 514
42. Freddie Hand 508

We also had Jeremy Kong in the top 100, and Matthew White just outside.

The top times were very speedy, perhaps reflective of a slightly smaller set of 13 puzzles - and Sam finally has his clean solve of everything, which is good to see. My solve of the killer was catastrophically stupid meaning I had to abort and leave it on the table, which is a pity as it was a nice puzzle with a very smooth flow. Entering the same answer code for both keys is something I’ll look to avoid in future! It only cost me 20 points and 4 places, so that’s a relatively light mistake compared to what I was fearing.

pinkagape
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by pinkagape » Thu 20 May, 2021 6:26 am

Any ideas for Hiroimono for this weekend's Puzzle GP? I'm struggling to see good techniques and there's six of this type!

Puzzle_Maestro
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Puzzle_Maestro » Thu 20 May, 2021 7:00 am

If you want practice in the genre, head over to puzz.link. There are a few there under the name 'goishi'.

Feadoor
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Feadoor » Thu 20 May, 2021 8:19 am

Another possibility is to skip them all since there are plenty of points elsewhere! :lol:

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Thu 20 May, 2021 9:55 am

Big pointer double choco! There’s some good practice material here :)

https://www.theguardian.com/science/202 ... -chocolate

I’m not sure how a 173 point maxi loop found it’s way into this contest, but that’s probably worth highlighting as well

Puzzle_Maestro
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Puzzle_Maestro » Thu 20 May, 2021 10:18 am

It's worth mentioning that high-pointers are frequently overvalued, eg the variant yinyang in R2 and the no-Swiss slitherlink in R4. So it may well be worth going for the double choco and the maxi loop first.

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Thu 20 May, 2021 3:26 pm

Yeah maybe… I’d roughly guess that at that valuation, it still implies the testers think this is going to be a 30 minute puzzle for a very good level of solver (top 50 at the WPC) - that’s almost unheard of for a competition puzzle.

I think that tells me two things: firstly it’s probably a very large grid size, and secondly there’s probably a clever global topological/connectivity argument (or equivalent novelty) you’re supposed to find. Maybe it’ll end up quicker points with that in mind?

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Wed 26 May, 2021 3:13 pm

Preliminary results for round 5 of the puzzle GP are out, which again I don't think are going to change (sadly I can't go back and slot in the trivially missing L from the statue park :( ). Here's the top 3

3. Freddie Hand 805
11. Neil Zussman 699
13. James McGowan 694

Sam was also just outside the top 20, I was just outside the top 50, and Adam also made the top 100.

Again, I'm planning on setting a zoom chat to discuss for anyone who wants to join. I'll post details separately but it'd be great to chat through some of these puzzles

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Thu 03 Jun, 2021 3:00 pm

Round 6 of the sudoku GP this weekend. I've enjoyed the last few rounds but going through this IB I think this has the potential to be my least favourite round so far. I guess we'll see. I'm planning on having a debrief on Zoom again next Monday for anyone who is interested!

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Tue 08 Jun, 2021 9:20 pm

Preliminary results for sudoku GP round 6 are out:

32. Sam Cappleman-Lynes 508
41. Mark Goodliffe 457
57. Jeremy Kong 423

Also in the Top 100 were Tom Collyer, Adam Bissett and Calum Mailer

I did not enjoy that round at all - repeatedly broke the irregular, and was slow on the scattered after time (don't think i was getting it in time). Also after time, I think the little killer required some rather contrived colouring on the 8s in order to break in as far as I can tell, which isn't particularly fun under time pressure (maybe I've missed something?). The last puzzle I had about as much fun with as I expected to have.

Feadoor
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Feadoor » Wed 09 Jun, 2021 5:49 am

The Little Killer didn't need anything quite so contrived - at the sticking point (or at least, what was the main sticking point for me) you can simply ask where 9 goes in column 9.

pinkagape
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by pinkagape » Thu 17 Jun, 2021 3:43 pm

Any ideas how to get into the Meandering Wordsearch example for the Puzzle GP this weekend?

Mblount
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Mblount » Thu 17 Jun, 2021 10:11 pm

I might be missing something more obvious, but after (a lot of) head scratching I've realised the 9-cell cage must have ACEGI in the corner and centre cells and BDFH in the edge cells. I'm not sure what the etiquette is for spoilers here, so to be safe I've rot13 'd the detail of my solving method below.

If there's quicker ways to cut down options than relying on parity of letter placements (particularly in cages with odd numbers of cells), then I'd appreciate hearing about them :)

Gur OQOQ jbeq pna'g or va gur sbhe pryy pntr, fb zhfg or n jbeq frnepu, naq zhfg vagrefrpg gur 9 pryy pntr. Cynprzrag bs O naq Q va gur 9 obk pryy sbeprf gur jbeq gb or qvntbany, naq abar bs gur guerr-yrggre jbeqf ner pbzcngvoyr jvgu OQOQ rkgraqvat vagb rvgure bs gur gbc yrsg/evtug pbearef. Guvf yrnirf 4 cbffvoyr cynprzragf sbe OQOQ (gjb qvntbanyf, rnpu pbhagrq gjvpr sbe erirefny)

Gur arkg guvat V ernyvfrq vf gung NOPQ zhfg or va gur sbhe pryy pntr. Guvf vf orpnhfr vs vg'f abg, vg zhfg or n jbeq frnepu, naq orpnhfr bs gur pbafgenvagf ba gur 9 pryy pntr, (naq gur cbffvoyr cynprzragf bs N naq Q va gur 3 obk pryyf) vg zhfg tb iregvpnyyl. Fvapr jr'ir nffhzrq NOPQ vf n jbeq frnepu, gurer'f ab Q va gur 4-pryy pntr, fb vg zhfg eha iregvpnyyl guebhtu gur yrsg 3 pbyhzaf. Vg pna'g tb guebhtu gur yrsg pbyhza, nf guvf sbeprf gur Q va E4P1 naq fb pna'g or hfrq sbe OQOQ. Haqre bhe nffhzcgvba gung NOPQ vf n jbeq frnepu, OQOQ pna'g tb qbja naq gb gur evtug rvgure. NOPQ pna'g tb guebhtu gur 9 pryy pntr nf vg jbhyq sbepr nqwnprag cynprzrag bs gur N be Q.

Fb, NOPQ zhfg tb va gur sbhe pryy pntr, naq gur pbagragf bs gur fvk pryy naq 9 pryy pntrf ner xabja.

Sebz gurer V fgnegrq ybbxvat ng NUOS. Gur cynprzrag bs yrggref va gur 9 oybpx pryy zrnaf gung NUOS pna gnxr ng zbfg gjb yrggref sebz vg. Bar bs gurfr zhfg or U, naq (V guvax) NUOS vf sbeprq gb fgneg sebz gur gbc evtug naq tb qbja gb gur yrsg qhr gb n ynpx bs bcgvbaf sbe S.

Cynprzrag bs NUOS sbeprf cynprzrag bs QOQO, naq NOP va gur gbc evtug. PQV pna'g tb va gur yrsg unaq obk nal zber, fb zhfg or n jbeq frnepu, naq guvf sbeprf cynprzrag bs gur V. Sebz gurer V guvax rirelguvat snyyf vagb cynpr.

pinkagape
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by pinkagape » Sat 19 Jun, 2021 6:48 pm

Thanks - that's super helpful and gives good ideas for the main one, I hope.

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Tue 22 Jun, 2021 9:51 am

Hmm - an interesting round for sure!

The (relatively!) poor showing of Japanese solvers this round perhaps suggests that some of these puzzles might be pushing the idea of culture neutral a little far. For the word puzzles, I thought it was a poor decision to prioritise aesthetic themes over how nicely the puzzle was to solve - it didn't really work out very nicely. Much better to order word lists by length of word, ideally then alphabetically, and then to use a fixed width font - this is particularly important for puzzles like meandering words where you want to be able to quickly scan through the possibilities. The presentation as it appeared in the booklet seemed to me to be a real detriment to solving.

Also, perhaps this is just my eye for typeface, but there was something really quite strange going on with the kerning around the I's!

Anyhow, this contest was great news if you happen to be quick with word puzzles - and looks like this includes Sam and Freddie. By my reckoning I think this could well be the first time someone from the UK has claimed a GP win (not that we didn't think it was anything but a matter of time for Freddie!)

1. Freddie Hand 883.7
13. Sam Cappleman-Lynes 655
24. James McGowan 593

Also in the top 50 was Jeremy Kong, and just outside the top 50 were Tom Collyer and Neil Zussman. Matthew White and Adam Bissett also made the top 100, rounding out another strong UK performance.

Puzzle_Maestro
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Puzzle_Maestro » Tue 22 Jun, 2021 10:26 am

Agreed re. presentation of words. I ended up rewriting the list ordered by length on a separate piece of paper for the meandering wordsearch.

Somewhat ironic that this rather unnoteworthy theme was deemed worthy of preserving whereas the highly impressive 'magic square' theme of the Hiroimonos last round was destroyed, even if that was due to a miscommunication.

Feadoor
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by Feadoor » Tue 22 Jun, 2021 11:15 am

I did the same for Meandering Wordsearch and the 2 minutes I spent doing so was easily offset by how much easier the puzzle became to solve.

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Mon 05 Jul, 2021 6:07 pm

Round 7 of the sudoku GP has been happening this weekend, there’s still (just about!) time to have a go, but if you’ve already taken part and want to chat it through then feel free to join our zoom session at 8.30 tonight

http://forum.ukpuzzles.org/viewtopic.ph ... 893#p16893

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Thu 08 Jul, 2021 12:03 am

Results for round 7 are finally out, and they look like:

19. Tom Collyer 551
33. Sam Cappleman-Lynes 515
44. Freddie Hand 429

Also in the top 100 was Jack Lawrence; Jeremy Kong and Calum Mailer were just outside.

detuned
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Re: 2021 WPF Sudoku and Puzzle GPs

Post by detuned » Fri 23 Jul, 2021 10:35 pm

Official results for round 7 of the Puzzle GP are out:

3. Freddie Hand 743
10. Neil Zussman 710
14. James McGowan 672

As far as the top 3 goes, that's probably the single strongest showing I think the UK has had! Sam Cappleman-Lynes was top 50, Jeremy Kong just outside, and with Adam Bissett and Tom Collyer also both in the top 100.

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