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WPF Puzzle GP 2020

Posted: Tue 14 Jan, 2020 6:18 pm
by Puzzle_Maestro
The first round of the 2020 Puzzle GP starts this weekend. The instructions booklet can be found here: https://gp.worldpuzzle.org/content/inst ... -booklet-2.

Overall, this seems to be a pretty good mix of puzzles. A bit disappointed however to see a 97-point hideout fences: I disliked the genre and did terribly on it at the WPC.

Happy puzzling!

Re: WPF Puzzle GP 2020

Posted: Tue 21 Jan, 2020 7:04 am
by Puzzle_Maestro
Preliminary results for round 1:

11. Neil Zussman 619
27. James McGowan 493
76. Tom Collyer 335

This felt like a really tough round to me (loads of difficult high point puzzles) and indeed, nobody was able to finish the round, not even Ken Endo, who sent in submissions for all puzzles but made two mistakes.

Good to see Neil putting his ‘start-from-the-back-where-the-points-are’ strategy to effective use!

Re: WPF Puzzle GP 2020

Posted: Tue 21 Jan, 2020 8:25 am
by detuned
There were lots of points for this round wich kind of meant puzzle selection was key. I'm a bit annoyed I missed the fillomino variant, and the tera XX as they were both relatively easy points compared to what I did do.

Bad luck with answer keys Freddie, I assume 10/14 isn't all wild speculation and/or mistakes on your part.

Re: WPF Puzzle GP 2020

Posted: Tue 21 Jan, 2020 1:02 pm
by Feadoor
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 overall.

Re: WPF Puzzle GP 2020

Posted: Wed 22 Jan, 2020 4:14 pm
by Puzzle_Maestro
Results have now been updated to include partial points for puzzle 2 - the word search (count). I was hoping to pip Tom to the post with that small addition, but it turns out Tom did the same thing!

Re: WPF Puzzle GP 2020

Posted: Thu 13 Feb, 2020 5:29 pm
by Puzzle_Maestro
The IB for round 2 (with points) can be found here: https://gp.worldpuzzle.org/sites/defaul ... IB_v01.pdf.

Perhaps surprisingly, there are no unfamiliar puzzles in this round: I have frequently encountered all of the puzzle types (except nonconsecutive futoshiki, but this is only a small twist on a well known type), so I suspect there will be a lot of finishers this round. The 25-point fill in the blanks is slightly intimidating though...

Re: WPF Puzzle GP 2020

Posted: Thu 13 Feb, 2020 10:36 pm
by detuned
Re the GP, there is a certain limit built into the balance of the rounds, as stated on the rules page: https://gp.worldpuzzle.org/content/rules
Each round will consist of a variety of puzzles, of different difficulties.
~30% of the round will consist of puzzles that have very simple rulesets that any solver can understand and approach, without requirement of a WPC background. The puzzles must still observe culture and language neutrality as is the case in a WPC.
~40% of the round will consist of some selections from the 70 or so most commonly encountered “WPC-style” puzzle types. These puzzle types are usually called “classics” or “evergreens” at the World Puzzle Championship. The puzzles are usually on a grid and require the solver to write information in the grid subject to given information and logical constraints. The rules for the puzzle types will be familiar to most WPC veteran competitors.

~30% will consist of puzzles that a competitor might encounter at a modern World Puzzle Championship (“WPC-style”). The puzzles are usually on a grid and require the solver to write information in the grid subject to given information and logical constraints. They can often consist of new types or new variations, and may be harder than the puzzles comprising the remainder of the round.

Re: WPF Puzzle GP 2020

Posted: Fri 14 Feb, 2020 7:39 am
by Puzzle_Maestro
I am aware of that, but the latter 30% seems to be almost nonexistent!

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 7:54 am
by pinkagape
I’m not very impressed with the fill in the blanks. How is that a puzzle? I had a quick look while it was printing out but assumed some level of thought, not just processing, would be involved. I’m not sure how that warrants a space in the mix.

Otherwise I did like the range of puzzles available, but it’s not like they were short of puzzles for this round.

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 9:07 am
by Puzzle_Maestro
Preliminary results for round 2:

13. Neil Zussman 605
29. James McGowan 508
34. Freddie Hand 495

Slightly disappointed not to have done the first puzzle: like Adam, I assumed the pattern would be slightly hidden (being a 25-point puzzle) so skipped it, but it turned out to just be a cubic sequence (x^3+4x^2+3x+1 for anyone interested). Also, got stuck for several minutes on the scrabble puzzle (since I couldn't find 'ar' in the set of given words), and only realised afterwards that it was in the first word 'car'. Doh!

Congratulations to Neil on another excellent result. Finishing only 7 places behind Ken Endo is something to be proud of, even if Ken was only 6th!

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 9:18 am
by Feadoor
Puzzle_Maestro wrote:
Tue 18 Feb, 2020 9:07 am
it turned out to just be a cubic sequence (x^3+4x^2+3x+1 for anyone interested)
Or, if that looks ugly to you (it does to me) - how about (x + 1)^3 + x^2

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 3:32 pm
by detuned
Quite annoyed to miscount 7 as 6 for the 59point nurikabe - that would have moved me up to 40th. I think it’s going to be pretty competitive behind Neil and James this year!

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 3:34 pm
by detuned
Also note that for whatever values you put for the sequence, there will be a 6th order polynomial you can construct that fits the sequence. It’s a terrible puzzle for the GP.

Re: WPF Puzzle GP 2020

Posted: Tue 18 Feb, 2020 9:42 pm
by Nilz
I'm not a fan of number sequence puzzles in general, but this one was nowhere near as bad as the one from last year's Mind Sports Olympiad that was posted in another thread at the time. The difference between successful numbers is 22, 42, 68... The difference between *those* numbers is 20, 26, 32... which increases by 6 each time. It's not what I'd really call a 'logic' puzzle, but I've seen far worse sequences.
Puzzle_Maestro wrote:
Tue 18 Feb, 2020 9:07 am
Congratulations to Neil on another excellent result. Finishing only 7 places behind Ken Endo is something to be proud of, even if Ken was only 6th!
I was *only* behind EIGHT Japanese solvers (including Ken)...

Re: WPF Puzzle GP 2020

Posted: Wed 19 Feb, 2020 12:33 am
by detuned
Nilz wrote:
Tue 18 Feb, 2020 9:42 pm
It's not what I'd really call a 'logic' puzzle, but I've seen far worse sequences.
I'd call it maths homework :lol: