UKPA Open Sudoku and Puzzle Tournaments 2019
UKPA Open Sudoku and Puzzle Tournaments 2019
The instruction booklets and schedule for the UKPA Open Sudoku and Puzzle Tournaments 2019 have now been published.
If anyone else would like to take part then we still have some availability, please do not hesitate to contact me at liane@ukpuzzles.org . Further information can be found at: viewtopic.php?f=8&t=1907 .
If anyone has any queries regarding any of the puzzles, please post your queries on this thread and we’ll endeavour to answer them as quickly as possible. Please identify the round/puzzle in your query.
We are indebted to the fantastic puzzle authors from around the world who once again have created some wonderful puzzles for this competition – without them this would not be possible.
The authors are: Puzzler Media, Matúš Demiger, Jakub Ondroušek, Yosuke Iami, Richard Stolk, Ashish Kumar Rishi Puri, Nikola Živanović, Alex Robinson, Liane Robinson, Anthea McMillan, James McGowan, Murat Can Tonta, Bram de Laat, Čedomir Milanović, Tawan Sunathvanichkul and Prasanna Seshadri.
Similarly, thanks also goes to our test solvers: Esra Aydemir, Fatih Kamer Anda, Matúš Demiger, Zuzana Hromcová, Gyorgy Istvan, Yuhei Kusui, Bram de Laat, James McGowan, AJ Moore, Murat Can Tonta, Jakub Ondroušek and Nikola Živanović
If anyone completes a round early then six bonus points per full minute saved will be awarded if all puzzles are solved correctly. If there is one small mistake then half bonus will be awarded.
If anyone has any special dietary requirements that I’m not aware of please can you let me know.
If anyone is only registered to take part in the Sudoku Tournament they will be more than welcome to stay and take part in the first round of the Puzzle Tournament – please let me know so that I can ensure I will have enough puzzle booklets available.
If anyone else would like to take part then we still have some availability, please do not hesitate to contact me at liane@ukpuzzles.org . Further information can be found at: viewtopic.php?f=8&t=1907 .
If anyone has any queries regarding any of the puzzles, please post your queries on this thread and we’ll endeavour to answer them as quickly as possible. Please identify the round/puzzle in your query.
We are indebted to the fantastic puzzle authors from around the world who once again have created some wonderful puzzles for this competition – without them this would not be possible.
The authors are: Puzzler Media, Matúš Demiger, Jakub Ondroušek, Yosuke Iami, Richard Stolk, Ashish Kumar Rishi Puri, Nikola Živanović, Alex Robinson, Liane Robinson, Anthea McMillan, James McGowan, Murat Can Tonta, Bram de Laat, Čedomir Milanović, Tawan Sunathvanichkul and Prasanna Seshadri.
Similarly, thanks also goes to our test solvers: Esra Aydemir, Fatih Kamer Anda, Matúš Demiger, Zuzana Hromcová, Gyorgy Istvan, Yuhei Kusui, Bram de Laat, James McGowan, AJ Moore, Murat Can Tonta, Jakub Ondroušek and Nikola Živanović
If anyone completes a round early then six bonus points per full minute saved will be awarded if all puzzles are solved correctly. If there is one small mistake then half bonus will be awarded.
If anyone has any special dietary requirements that I’m not aware of please can you let me know.
If anyone is only registered to take part in the Sudoku Tournament they will be more than welcome to stay and take part in the first round of the Puzzle Tournament – please let me know so that I can ensure I will have enough puzzle booklets available.
 Attachments

 Instruction Booklet  Puzzle Round 3  UKPA Open 2019 V1.pdf
 (519.36 KiB) Downloaded 121 times

 Instruction Booklet  Puzzle Round 1  UKPA Open 2019.pdf
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 Instruction Booklet  Puzzle Round 2  UKPA Open 2019 V1.pdf
 (352.62 KiB) Downloaded 135 times

 Schedule2019.pdf
 (217.59 KiB) Downloaded 172 times

 Instruction Booklet  Puzzle Round 6  UKPA Open 2019.pdf
 (133.88 KiB) Downloaded 130 times

 Instruction Booklet  Puzzle Round 5  UKPA Open 2019.pdf
 (581.42 KiB) Downloaded 137 times

 Instruction Booklet  Puzzle Round 4  UKPA Open 2019.pdf
 (351.58 KiB) Downloaded 141 times

 Instruction Booklet  Sudoku Round 3 UKPA Open 2019.pdf
 (767.72 KiB) Downloaded 139 times

 Instruction Booklet  Sudoku Round 2 UKPA Open 2019.pdf
 (765.52 KiB) Downloaded 154 times

 Instruction Booklet  Sudoku Round 1 UKPA Open 2019.pdf
 (137.8 KiB) Downloaded 148 times

 Instruction Booklet  Sudoku Round 5 UKPA Open 2019.pdf
 (631.45 KiB) Downloaded 137 times

 Instruction Booklet  Sudoku Round 4 UKPA Open 2019.pdf
 (646.15 KiB) Downloaded 140 times
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi,
overall the rounds look very exciting and I am glad I decided to participate this year. Two small points:
1) In round two of the puzzle competition, the minesweeper example puzzle does not seem to be a minesweeper puzzle.
2) Is there any additional information about the team rounds? They are mentioned in the schedule but there is no instruction booklet yet.
See you all next week,
Michael
overall the rounds look very exciting and I am glad I decided to participate this year. Two small points:
1) In round two of the puzzle competition, the minesweeper example puzzle does not seem to be a minesweeper puzzle.
2) Is there any additional information about the team rounds? They are mentioned in the schedule but there is no instruction booklet yet.
See you all next week,
Michael
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
We are glad to welcome you Michael.moss wrote: ↑Fri 22 Feb, 2019 2:36 pmHi,
overall the rounds look very exciting and I am glad I decided to participate this year. Two small points:
1) In round two of the puzzle competition, the minesweeper example puzzle does not seem to be a minesweeper puzzle.
2) Is there any additional information about the team rounds? They are mentioned in the schedule but there is no instruction booklet yet.
See you all next week,
Michael
Point 1)  amended booklet now uploaded (V1).
Point 2)  Team rounds are work in progress at the moment. The puzzles are ready and tested but I need to prepare the files for these. We put people into teams and try to have a good mix with ability, nationality etc. Separate prizes are awarded to the winning teams for each of the two team rounds.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hello, I'm quite excited to be participating for the first time and to meet everyone!
I am still however not very familiar on how the rounds work.
I noticed that in each round, there are a certain number of puzzles, and a specified time frame.
For example Round 1 Sudoku has 16 puzzles/45 minutes or Round 2 has 12 puzzles/60 minutes. Does that mean we need to finish the 16 puzzles within 45 minutes, or the 12 puzzles in 60 minutes? is that possible? or do we just select and do as many as we can within the given time.
Any tips would be greatly appreciated.
Thanks!
Hassana
I am still however not very familiar on how the rounds work.
I noticed that in each round, there are a certain number of puzzles, and a specified time frame.
For example Round 1 Sudoku has 16 puzzles/45 minutes or Round 2 has 12 puzzles/60 minutes. Does that mean we need to finish the 16 puzzles within 45 minutes, or the 12 puzzles in 60 minutes? is that possible? or do we just select and do as many as we can within the given time.
Any tips would be greatly appreciated.
Thanks!
Hassana
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi Hassana, Each round has the puzzles that are described in the instruction booklet. The best solvers may well solve all the puzzles in the time allowed for that particular round and if they do, they can earn bonus points for each minute that they save (as long as their answers are all correct, or one very small error will enable them to earn partial bonuses). For the majority of solvers completing a round is something that they may only be able to dream of and they will choose which puzzles to tackle first in each round depending on their own particular skills. For example, some people absolutely detest a particular type of puzzle so wouldn't attempt those unless they have to, whereas someone else will love that particular type and attempt them first. The points that have been allocated to each of the puzzles have been determined after analysing the times submitted by the test solvers and give an idea of the difficulty of each puzzle. That said, again, some people may find lower point puzzles to be harder than higher point puzzles.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Thank you Liane!
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Morning Liane
For the Twin Killer in Sudoku round 5, I’m a bit confused. It’s a pair of identical solutions but the cages are different in each grid and together they’ll give enough information, but not separately?
The Coded First Seen Snake in Puzzle round 3 has no solution in the instruction booklet, and I was struggling to see what I’d do with it.
With Heteromino in Puzzle round 4, is it only triominoes in use?
Looking forward to it!
For the Twin Killer in Sudoku round 5, I’m a bit confused. It’s a pair of identical solutions but the cages are different in each grid and together they’ll give enough information, but not separately?
The Coded First Seen Snake in Puzzle round 3 has no solution in the instruction booklet, and I was struggling to see what I’d do with it.
With Heteromino in Puzzle round 4, is it only triominoes in use?
Looking forward to it!
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi Adam,
Yes you are correct on the killers. The grids will be different but have an identical solutions. You 'll need to work on both grids to get the solution. As long as one grid is fully completed correctly then you will get the points awarded.
Coded First Seen Snake looks like the solution hasn't come through when printed. I've redrawn it and will upload the new version when I can get on the system.  New version now uploaded.
Heteromino yes it is only triominoes that are used.
Yes you are correct on the killers. The grids will be different but have an identical solutions. You 'll need to work on both grids to get the solution. As long as one grid is fully completed correctly then you will get the points awarded.
Coded First Seen Snake looks like the solution hasn't come through when printed. I've redrawn it and will upload the new version when I can get on the system.  New version now uploaded.
Heteromino yes it is only triominoes that are used.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
New version of Puzzle round 3 uploaded (solution of Coded First Seen Snake redrawn to be visible when printed).
Puzzle Round 1 reuploaded  no change, deleted in error.
Puzzle Round 1 reuploaded  no change, deleted in error.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
good morning,
Sudoku Round 4: 3 XV Sudoku seems to have more than one solution.
for the 1v4, 4v1 in the first column of boxes as well as the 9..8, 8..9 in that column of boxes.
Also the 5..6 placement in what might be the final steps of the puzzle can be placed in two different ways with the last 1s, 4s and 7s and the solved sudoku still works.
Thanks.
Regards
Tom
Sudoku Round 4: 3 XV Sudoku seems to have more than one solution.
for the 1v4, 4v1 in the first column of boxes as well as the 9..8, 8..9 in that column of boxes.
Also the 5..6 placement in what might be the final steps of the puzzle can be placed in two different ways with the last 1s, 4s and 7s and the solved sudoku still works.
Thanks.
Regards
Tom
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
hi again,
on the Sudoku Round 3: 7 Consecutive Sudoku, there are several possible solutions in terms of the placement of the last set of 4/5/6s as well as the last 1/3/9s and the positioning of two related 1/2 pairs.
Thanks for having a look into that.
Regards
Tom
on the Sudoku Round 3: 7 Consecutive Sudoku, there are several possible solutions in terms of the placement of the last set of 4/5/6s as well as the last 1/3/9s and the positioning of two related 1/2 pairs.
Thanks for having a look into that.
Regards
Tom
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi Tom, I hope you are enjoying working through the examples. I believe that the problem you are encountering with these is that the instructions stated that 'all' such marks are given in the grid, so for the XV puzzle for example, if you were to put 4,1 in row six instead of 1,4 then you would have a sum of 10 between the 1 and the 9. A similar situation would occur in the other places you mention. It is a similar situation with the Consecutive Sudoku that 'all' consecutive pairs are marked.
This can be a useful point when solving as it can rule out options.
This can be a useful point when solving as it can rule out options.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
hi there,
thanks for the reply. I'm surely trying to go through them all. Trying.
So just to make sure I understand it correctly... if the instructions state that all such occurencies are given, there cannot be a pair of numbers adding up to 5 or 10 anywhere else in the puzzle other than marked ones, correct? if that's so, then it makes sense
Thanks.
Tom
thanks for the reply. I'm surely trying to go through them all. Trying.
So just to make sure I understand it correctly... if the instructions state that all such occurencies are given, there cannot be a pair of numbers adding up to 5 or 10 anywhere else in the puzzle other than marked ones, correct? if that's so, then it makes sense
Thanks.
Tom
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Puzzle round 2, Four Winds / Eight Winds  does every cell in the grid have to be used?
Puzzle round 5, Pento Coral  must the pentominoes completely cover the coral i.e. must it consist of exactly 55 shaded squares?
Thanks,
Eva.
Puzzle round 5, Pento Coral  must the pentominoes completely cover the coral i.e. must it consist of exactly 55 shaded squares?
Thanks,
Eva.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
That is correct yes.TomasK wrote: ↑Sat 23 Feb, 2019 8:45 pmhi there,
thanks for the reply. I'm surely trying to go through them all. Trying.
So just to make sure I understand it correctly... if the instructions state that all such occurencies are given, there cannot be a pair of numbers adding up to 5 or 10 anywhere else in the puzzle other than marked ones, correct? if that's so, then it makes sense
Thanks.
Tom
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Yes to both  all cells will be used in the four winds and eight winds and the pento coral will consist of exactly 55 shaded cells.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Am I being daft (quite possible) or are there two solutions to Double Skyscrapers, Puzzle Round 5?
If you interchange the 1s and 2s in the second and fifth rows, I think that's still a valid solution or am I missing something in the rules?
If you interchange the 1s and 2s in the second and fifth rows, I think that's still a valid solution or am I missing something in the rules?
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Have you checked the last sentence of the instruction? If you were to swap them over the 1 that would be in row 2 would need to have a circle.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Oops. Many thanks.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Real pedantry here, but Round 4 Cave  can we shade the cave rather than the walls? The rules say "a single white area". That's not the way I tend to do these...
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi Liane  any chance we could get a combined PDF for each competition?
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Just tried doing one each for the Sudoku and Puzzle Tom and it came out that the file was too large. Will try something tomorrow.
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
The attached file includes instructions and examples for puzzles that will appear in the team rounds. Full instructions regarding the team rounds will be provided at the time, but as there are puzzle types that are not included elsewhere these are provided for familiarisation.
 Attachments

 Team Rules.pdf
 (254.97 KiB) Downloaded 86 times
Re: UKPA Open Sudoku and Puzzle Tournaments 2019
Hi,
Would we have to take printouts of the instruction booklets or could we refer them on our phones during the event?
Would we have to take printouts of the instruction booklets or could we refer them on our phones during the event?