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World Puzzle Championship 2011


The 6th World Sudoku Championship and 20th World Puzzle Championship was held on 6th-10th November, 2011 in Eger, Hungary.

Championship Page


This is the first time the WSC and WPC was held as a combined event.

Team India
The national finals of the Indian Sudoku Championship and the Indian Puzzle Championship was held in June 2011. Unfortunately, Ritesh Gupta and Gaurav Korde were unable to attend the WSC, and Harmeet Singh was unable to attend the WPC. So, we were forced to go down the list and finally are team consisted of:

Sudoku Team
Sumit Bothra (Bengaluru)
Tejal Phatak (Mumbai)
Prasanna Seshadri (Mumbai)
Rohan Rao (Mumbai)

Puzzle Team
Rajesh Kumar (Bengaluru)
Rajib Ranjan Borah (Mumbai)
Tejal Phatak (Mumbai)
Rohan Rao (Mumbai)

I was very busy since I had three exams before my trip and have my entire end-semester examinations immediately after my trip, so I spent minimal time for puzzles. Not the best thing to do by a national champion but I was left with little choice.

Last year I stood 41st in WPC and my goal this year was to reach the top 25.


6th November, 2011 - 8th November, 2011
World Sudoku Championship 2011

9th November, 2011
We had a day before WPC began. A city tour to an ice cave seemed exciting but no one was prepared for the surprise that awaited us. Right in the midst of the cave, was held the WSC prize distribution and the photo session!

It was an excellent idea, and it went pretty smoothly. It was nice on the organisers part to do something different of this sort, yet, not overly change things.

10th November, 2011
The World Puzzle Championship 2011 began.


Round 1: In Memorium
It was a pretty ordinary start. Not too good, not too bad. Ulrich Voigt (Germany) outperformed everyone by a good margin.


Round 2: Assorted Puzzles
I started feeling weary and tired. Mental strain was winning over my body. I seemed very slow in a lot of puzzles this round, and I knew this was going to be a bad round. And it was.


Round 3: Cows
I'm usually good at recovering after bad rounds, and this was no exception. The 75-pointer Small Regions was my strength and I'm glad I could crack it. The 'Knight' puzzle had no solution, so I'm sure many players would've been affected.


Round 4: Borderless
Clueless in borderless. I do not know how other players felt about this round, but I had no strategy in this round. I was not comfortable with any variant, and I couldn't see a path other than guesswork in solving these puzzles. I wasn't even confident of getting a non-zero score.

During the first 15 minutes, I kept switching from one puzzle to another, having no progress at all. Then, I found a clue in Easy As ABC (big) and I solved it. That encouraged me to do the smaller one too, and that was all. Palmer Mebane (USA) scored 295. I wonder...


Round 5: Evergreens
I thought this was one round where I could really score well. I was quite disappointed with my performance. Got stuck in a couple of puzzles, made an error in one. On my day, I could've done much much better.


Round 6: Board Games
The concept and puzzles was very nice. It was fun solving them. Lets not talk about the scores though.


Round 7: Naval Puzzles
By this time, all of us were tired and we knew we had no hope to getting into the top 15 in the team rankings. We just solved this for the fun of it.

Not a very good first day for me. I was ranked around 40th at the end of Day 1. Too difficult to get into top 25 from here. I just hoped to better my last year's rank of 41.


11th November, 2011
Day 2 of WPC.


Round 8: Screen Test
This was the best round of WPC. A screen test with animations! Some beautiful puzzles, and great ideas. A huge round of applause followed the test which shows most people enjoyed the test. I hope some players benefitted by the Screen Test I had organised on LMI a week before :-)

In terms of scores, Annick Weyzig (Netherlands) and Jason Zuffranieri (USA) topped with 185 points. I scored 125 and at least I beat Palmer Mebane (USA) and Ulrich Voigt (Germany) in one round!


Round 9: Sprint
Anyone loves Numberlink and Train puzzles? Try solving these ones. These were some tough ones for me. I think some of them were the toughest I've ever solved.

Round 10: Divide And Conquer
I love this puzzle type. And the puzzles that appeared, were simply superb. Even the easier ones, had some fantastic logic to it.


Round 11: Magic 11
This round was themed around the number '11'. It was a good round for me.


Round 12: Hungaricum
A couple of good rounds earlier, but this round was not good. I was floating around the mid-30's and I had a good chance to squeeze myself in the top 30 with one round left.


Round 13: Innovative
Another average round.


Round 14: Best Of
The last individual round. And I messed it up. I got the lowest points among the players in the top 35 and I lost three ranks directly.

Bad finish, but I'm glad I was able to better my rank. I finished 34th.


WPC Playoffs
The format of the playoffs was interesting. Top 10 puzzlers start solving based on a time difference in proportion to their scores. The last 3 players to finish the first 3 puzzles are eliminated. Then the last 2 players to finish the next 3 puzzles are eliminated. Then a fight to the finish with the last 3 puzzles.

Ulrich Voigt (Germany): 7-time World Puzzle Champion. He had a big lead, and would surely win if the playoffs went smoothly.

Palmer Mebane (USA): Beating Thomas Snyder at USPC is no joke. Beating him again at WPC is no luck. I was pretty confident he would make it to the podium.

Thomas Snyder (USA): Performed poorly in Day 2, and lost chunks of points. But, you could never count him out till the end.

The fight for the title had to be between these three players. It was unlikely someone else would win.

Hideaki Jo (Japan), Bram de Laat (Netherlands), Peter Hudak (Slovakia), Nikola Zivanovic (Serbia), Roland Voigt (Germany), Wei-Hua Hwang (USA) and Neil Zussman (UK) complete the top 10. Michael Ley (Germany) finished 7th in the standings, but surprisingly (and unfortunately), he was not in the official team, and hence could not participate in the playoffs.

The playoffs began and it was going like everyone had expected. Ulrich had a one puzzle lead for a major portion and Palmer was catching up quickly. Thomas was unable to catch up to them. It all seemed to going well, and Ulrich reached the second last puzzle, with a one puzzle lead. Then the tables turned. Ulrich kept making a mistake. He was desperately erasing and trying. Palmer on the other hand, completed the puzzle and was the first one to reach the last puzzle. A few minutes later, he had won. Ulrich was still stuck on the puzzle. Now even Thomas reached the puzzle and solved it too! Just a few seconds after Thomas reached the last puzzle, was Ulrich able to complete his second last one. But he beat Thomas in the last puzzle to take silver.


Playoff Results

1. Palmer Mebane (USA)
2. Ulrich Voigt (Germany)
3. Thomas Snyder (USA)


Individual Results

1. Ulrich Voigt (Germany) - 5085
2. Palmer Mebane (USA) - 4769
3. Thomas Snyder (USA) - 4546

Indian Results

34. Rohan Rao - 2898
85. Rajesh Kumar - 1691
91. Rajib Ranjan Borah - 1495
97. Tejal Phatak - 1143

Complete Individual Results


Team Results

1. USA - 20447
2. Germany - 20304
3. Japan - 18026

Complete Team Results

Overall, it was a great championship. The puzzles, the rounds, and the format and organisation was as good as it could get. With WSC and WPC combined, it involves a lot of effort and work, and the Hungarians did a wonderful job.

I am happy with my performance. Top 25 would have been ideal, but at least I was able to improve my rank.

Congrats to Palmer Mebane for winning his maiden WPC title.


Congrats to Thomas Snyder for finishing on the podium in both events. Congrats to Thomas Snyder, Hideaki Jo and Nikola Zivanovic (and Michael Ley) for making the playoffs (top 10) in both events.

It was good meeting up with old friends and new ones, and I hope this trend of WSC+WPC continues (maybe with a little more rest time or little less puzzles!)

World Sudoku Championship 2011


The 6th World Sudoku Championship and 20th World Puzzle Championship was held on 6th-10th November, 2011 in Eger, Hungary.

Championship Page

This is the first time the WSC and WPC was held as a combined event.

Team India
The national finals of the Indian Sudoku Championship and the Indian Puzzle Championship was held in June 2011. Unfortunately, Ritesh Gupta and Gaurav Korde were unable to attend the WSC, and Harmeet Singh was unable to attend the WPC. So, we were forced to go down the list and finally are team consisted of:

Sudoku Team
Sumit Bothra (Bengaluru)
Tejal Phatak (Mumbai)
Prasanna Seshadri (Mumbai)
Rohan Rao (Mumbai)

Puzzle Team
Rajesh Kumar (Bengaluru)
Rajib Ranjan Borah (Mumbai)
Tejal Phatak (Mumbai)
Rohan Rao (Mumbai)

I was very busy since I had three exams before my trip and have my entire end-semester examinations immediately after my trip, so I spent minimal time for puzzles. Not the best thing to do by a national champion but I was left with little choice.

Last year I stood 15th in WSC and my goal this year was to reach the top 10. I really thought I could make it this time, especially with my improvement in the LMI tests and other championship results.



6th November, 2011
We reached Eger around 6pm, rested for a while, and went for the Welcome Party. All of us were quite tired and sleepy after an 8-hour journey and being 4.5 hours behind our usual time-zone, we immediately hit the sac.


7th November, 2011
The World Sudoku Championship 2011 began.

Part 1: Wrong Puzzles
Many players were of the opinion that this is not a 'sudoku-solving' round. I was indifferent. I didn't think it was completely random, nor was I convinced it was the best round to start a WSC with.

The puzzles were a pleasant surprise. There were a good mix of grids, with various fonts, styles, sizes and overall, it was a fun round. I don't think many people would have complained after the round, but surely, it was better than expected for most players.

In terms of scores, I started very poorly with a mere 68 points in this round compared to the highest 150 by David McNeill (UK).


Part 2: Sudoku Pieces
It took me a while in understanding the puzzle when I was studying the booklet. Once it was clear, I wasn't comfortable with this. I'm not very good at these kind of sudoku rounds. When it was announced that we had to place the pieces on the sheet itself, I thought I was doomed. I just wanted the round to begin and then end, as soon as possible. I was glad this round had partial scoring.

When the round started, it was a little comforting that there were 81 clues and no empty cells. I was slow to start, but after getting a few pieces, I was quickly able to crack the grid. I was mighty pleased with myself as (I think) this was the first time I said 'Finish!' at a WSC :-)


Part 3: Easy Classics
This round went quite average for me. Tiit Vunk (Estonia) scored an exceptional 605 points.


Part 4: Halved Squares Sudoku
I had a bad feeling about this round. I did not practise at all (not even the ones of the Hungarian championship) and I was quite sure this would be one of the bad rounds.

I will not say it was good, but it went better than I expected. A below average score though.

Thomas Snyder (USA) took a considerable lead from many top players after this round.


Part 5: Sudoku Central Clues
This round was good, and I was able to move up a few ranks. I think I was 17th or 18th after this round at the end of Day 1 of Individuals.


Part 6: Circle Sudoku (Team)
The concept of this round was well thought of. The execution, even better. I always enjoy solving linked puzzles and this was very exciting. We were able to solve 4 sudokus and missed one more by a few seconds.


Part 7: Vasarely Sudoku (Team)
Another nice team round and we were quite happy we were able to finish it in time. A lot of other teams finished it too.


8th November, 2011
Day 2 of WSC. I needed all my rounds to go extremely well in order to be in the top 10. Tough chance, but possible.


Part 8: Decorated Sudoku
This was one of the big rounds. I started well and scored 465 points. Just for argument sake, I equalled Thomas Snyder (USA) in this round!


Part 9: Sprint Sudoku
A fast-paced round. I need to practise these Sprint rounds. I tend to do better in longer rounds. Probably because of my mental stamina.


Part 10: Sudoku Mix
Another big round. This round pulled me down a bit. I got stuck in Tetris and Increasing Roundabout and lost some time.


Part 11: Not Easy Classics
I got the highest score in Hard Classics in WSC 2010 in Philadelphia. Well, fluke rarely happens twice!


Part 12: 3D Sudoku
I'm not particularly good at solving Cube Sudokus, but I surprised myself and was able to solve it in time. So, second time in one WSC, I said 'Finish!'. Pretty cool!


Part 13: Weakest Link (Team)
A standard weakest link round where each player of the team solves an individual puzzle and then goes to the team table. Our team finished this round and we were confident of finishing in the top 10 in the team rankings.

WSC Playoffs
I finished 12th. Missed the playoffs by about 80 points. The playoffs consisted of a good set of players.

The format of the playoffs was interesting. Top 10 puzzlers start solving based on a time difference in proportion to their scores. The last 3 players to finish the first 3 puzzles are eliminated. Then the last 2 players to finish the next 3 puzzles are eliminated. Then a fight to the finish with the next 4 puzzles.

Thomas Snyder (USA): World Sudoku Champion 2007, 2008. He had a big lead and would surely win if the playoffs went smoothly for him.

Jan Mrozowski (Poland): World Sudoku Champion 2009, 2010. He was probably the biggest threat to Thomas.

Tiit Vunk (Estonia) and Kota Morinishi (Japan) were looking very strong in the championship.

Florian Kirch (Germany), Jan Novotny (Czech Republic), Nikola Zivanovic (Serbia), Michael Ley (Germany), Hideaki Jo (Japan) and Jakub Ondrousek (Czech Republic) complete the top 10.

The playoffs started with a shock. Jan Mrozowski was stuck on the second puzzle while everyone else proceeded. He probably had some problem on his end. Kota Morinishi was racing through the puzzles and catching up with Thomas who was always one table ahead. Thomas kept the lead and calmly finished all the puzzles. Kota finished second, and Tiit,  with a slight stumble midway finished 3rd. Hideaki, after starting 9th, finished a creditable 4th.


Playoff Results

1. Thomas Snyder (USA)
2. Kota Morinishi (Japan)
3. Tiit Vunk (Estonia)


Individual Results

1. Thomas Snyder (USA) - 3760
2. Jan Mrozowski (Poland) - 3525
3. Tiit Vunk (Estonia) - 3459


Indian Results

12. Rohan Rao - 2983
44. Sumit Bothra - 2154
54. Tejal Phatak - 1966
71. Prasanna Seshadri - 1725
101. Rajesh Kumar - 1314

Complete Individual Results


Team Results

1. Germany - 16436
2. Czech Republic - 16181
3. USA - 14488

8. India - 11708

Complete Team Results

Overall, it was a great championship. The sudokus, the rounds, and the format and organisation was as good as it could get. With WSC and WPC combined, it involves a lot of effort and work, and the Hungarians did a wonderful job.

I am happy with my performance. Top 10 would have been ideal, but at least I was close. Maybe next time.

Congrats to Thomas Snyder for winning his 3rd WSC title. He has been very consistent throughout the year and is a deserving winner.

It was good meeting up with old friends and new ones, and I hope this trend of WSC+WPC continues.

Logic Masters India - Screen Test 2


Logic Masters India announces the second edition of Screen Test. It will be held on 1st-4th November.

I authored last year's Screen Test 1 with Deb Mohanty. This year, I authored it alone. I learnt a lot from last year and was quite happy with the response. I'm hoping this time it turns out to be better and bigger since there are some changes that have been made based on the feedback.

Championship Page
Download Screen Test Guide
Forum

For new-comers as well as regulars, it is very important to read through the Screen Test Guide and go through the examples on the webpage before starting the test to have maximum benefit of the system.

You may ask any queries on the forum or here.

I hope you enjoy the puzzles and relish the 35-minute puzzle-ride!

Logic Masters India - October 2011 Puzzle Test

Logic Masters India announces the October 2011 Puzzle Test 'Double Decathlon'. It will be held on 15th-16th October, 2011.
The author of the puzzles is Thomas Snyder. You will find a lot of practise puzzles on his blog 'The Art Of Puzzles'.

Championship Page
Download Instruction Booklet
Download Puzzle Booklet
Password will be available when you start the test.
Forum

Results will be declared on 17th October.

Logic Masters India - October 2011 Sudoku Test

Logic Masters India announces the October 2011 Sudoku Test 'A or B'. It will be held on 1st-2nd October, 2011.
The author of the puzzles is Deb Mohanty.

Championship Page
Download Instruction Booklet
Download Puzzle Booklet
Password will be available when you start the test.
Forum

The list of sudokus that will appear in the test are:

Odd Sudoku
Extra Region Sudoku
Greater Sudoku
Lesser Sudoku
Even Sudoku
Small Neighbours Sudoku
Sequence Sudoku
Palindrome Sudoku
Marked Quadro Sudoku
Multiplication Table Sudoku
Neighbouring Sudoku
Sum 10 Sudoku
Multiple Sudoku
Touchy Sudoku
Antiknight Sudoku
XV Sudoku
Kropki Sudoku
Consecutive Sudoku
Fiver Sudoku
Skyscraper Sudoku
Outside Sudoku
Odd/Even View Sudoku

Please read the instructions carefully. This is a different type of sudoku test.

Results will be declared on 3rd October.

US Sudoku Championship 2011

The US Sudoku Championship 2011 was held on 24th September, 2011.

View Championship Page

You can download the booklets from the website.

USA Results


1. Jonathan Rivet - 255
2. Jason Zuffranieri - 230
3. Jim Schneider - 224

International Results


1. Branko Ceranic (Serbia) - 289.29
2. Bastien Vial-Jaime (France) - 280
3. Hideaki Jo (Japan) - 275
4. Ko Okamoto (Japan) - 260.17
5. Rohan Rao (India) - 260

Complete Results


Logic Masters India - September 2011 Sudoku Test


Logic Masters India announces the September Sudoku Test 'Crazy Arrows'. It was held on 10th-11th September, 2011.
I am the author!

Championship Page
Download Instruction Booklet
Download Puzzle Booklet
Password is CrazyzarCArrowsworrA
Forum

The list of sudokus that appeared in the test are:

0-9 Arrow Sudoku
Count Arrow Sudoku
Difference Arrow Sudoku
Incomplete Arrow Sudoku
Missing Arrow Sudoku
Parted Arrow Sudoku
Product Arrow Sudoku
Skyscraper Arrow Sudoku
Sum Arrow Sudoku
Symmetric Arrow Sudoku
Wrong Arrow Sudoku

Results

1. Thomas Snyder (USA) - 925
2. Nikola Zivanovic (Serbia) - 805
3. Kota Morinishi (Japan) - 760
4. Palmer Mebane (USA) - 740
5. Branko Ceranic (Serbia) - 715
6. Sinchai R (Thailand) - 700
7. Zafer Huseyin Ergan (Turkey) - 680
8. Sylvain Caudmont (France) - 660
9. Hideaki Jo (Japan) - 635
10. Peter Hudak (Slovakia) - 635

Best Indians

32. Rakesh Rai - 485
34. Amit Sowani - 465
42. Jaipal Reddy - 410
44. Sudhir Shankar Raman - 400
56. Rajesh Kumar - 350

Complete Results

Congrats to Thomas for winning Crazy Arrows with a big lead. Congrats to Nikola and Kota for 2nd and 3rd respectively.

I got the idea of Crazy Arrows last year, and I'm glad I could finally conduct this test. The test was tough, and some of the sudokus were very challenging for players.

0-9 was my favourite variation of this set, and also was the first variant that I had thought of.

Count was the easiest sudoku of the set and 90% of the players solved it.

Difference was difficult to start, but once you get few numbers correctly, the grid solves quickly.

Incomplete was another easy sudoku and this was Deb's idea that I worked on.

Missing was the toughest of the set. Guesswork was needed in multiple places and only 5 players were able to solve it. This is now the least solved individual sudoku on LMI so far. Maybe you can try to crack it!

Parted was not easy. After getting a few initial numbers, there is a little guesswork required.

Product was one of my favourite sudokus. The idea was taken from USA where it appeared in WSC 2010.

Skyscraper was relatively easy compared to the other sudokus.

Sum 1 was tough. As Jason mentioned in his post on LMI, it had a very 'Killer feeling'.

Sum 2 was my favourite. And it also is the favourite of the players. Most people commented on this grid and it has the maximum rating too, so, I consider this the cream of the set.

Symmetric was the one sudoku that couldn't make this test a neat one. It was worth 75 points and I apologize for the mistake on my part. It was much tougher and deserved a lot more points. It was also very difficult and a lot of players might've been affected by this and I regret the mistake.

Wrong was one of my top 3 sudokus of the set. Many players might have had a hiccough while solving when seeing a '9' on an arrow and a '1' in a circle. But I guess most of the players realised that it does work that way :-)

I thank all the participants for removing time and participating in Crazy Arrows and I hope you'll enjoyed at least a few of the sudokus. Hope to see you again in 'Crazier Arrows'!

Logic Masters India - September 2011 Puzzle Test

Logic Masters India announces the September 2011 Puzzle Test 'Sprint Test'. It was held on 3rd-4th September, 2011.
The author of the puzzles is Bastien Vial-Jaime (Ours Brun).

Championship Page
Download Instruction Booklet
Download Puzzle Booklet
Password is SroSis201246
Forum

The list of puzzles that appeared in the test are:

Akari
Fillomino
Fortress
Galaxies
Heyawacky
Horse Snake
LITS
Masyu
Nurikabe
Pointing Evens Sudoku
Slitherlink
Snail
Star Battle
Tapa
Yajilin

Results

1. Palmer Mebane (USA) - 348
2. Thomas Snyder (USA) - 345
3. Ko Okamoto (Japan) - 336
4. Nagata Yuta (Japan) - 312
5. Hideaki Jo (Japan) - 306
6. Psyho (Poland) - 306
7. Zoltan Horvath (Hungary) - 297
8. Kota Morinishi (Japan) - 288
9. Phillip Edwards (Australia) - 287
10. Michael Ley (Germany) - 285

Best Indians

46. Rakesh Rai - 180
49. Rohan Rao - 175
72. Amit Sowani - 140
97. Jaipal Reddy - 115
112. Harmeet Singh - 105

Complete Results

Another new dimension to LMI! A fast-paced test where every second counts. Puzzles were excellent. Full credit to Bastien for this fantastic set.
You make one error, and you lose chunks of relative time. Its quite disappointing that I wasn't able to finish all the 15 puzzles, especially when there are players who do it in half your time.
Congrats to Palmer and Thomas (I guess you'll are continuing the battle here too) and the Japanese for their excellent results.

Sudokucup 6 (Part 2)

The sixth Sudokucup was held in two parts. Sudokucup 6 Part 1 was held on 23rd-24th July, 2011.
Sudokucup 6 Part 2 was held on 3rd-4th September, 2011.

Championship Page
Download Instruction Booklet
Download Puzzle Booklet
Password is KNASUQ91?3JMEP


The list of sudokus that appeared in the test are:

1. Classic Sudoku
2. Diagonal Sudoku
3. Irregular Sudoku
4. Extra Region Sudoku
5. Antiknight Sudoku
6. Sequences Sudoku
7. Kropki Sudoku
8. All Even All Odd Sudoku
9. Surprise Sudoku
10. Clock-Faces Sudoku
11. More-Less Sudoku
12. Arrow Sudoku
13. Little Killer Sudoku
14. Decimal Killer Sudoku

Results

1. Jakub Ondrousek (Czech Republic) - 300 (01:10)
2. Jan Mrozowski (Czech Republic) - 300 (01:17)
3. Tiit Vunk (Estonia) - 300 (01:22)
4. Michael Ley (Germany) - 300 (01:24)
5. Jason Zuffranieri (USA) - 300 (01:25)
6. Hideaki Jo (Japan) - 300 (01:27)
7. Branko Ceranic (Serbia) - 300 (01:30)
8. Rishi Puri (India) - 300 (01:35)
9. Chen Cen (China) - 300 (01:36)
10. Nikola Zivanovic (Serbia) - 300 (01:38)

Best Indians

8. Rishi Puri - 300 (01:35)
15. Rohan Rao - 300 (01:46)
58. Jaipal Reddy - 227
69. Prasanna Seshadri - 211
83. Rakesh Rai - 171

Complete Results

Sudokucup 6 Part 2 was definitely much easier than Part 1. 27 Players finished all sudokus within the 2 hours compared to just 7 in Part 1.

Now that both parts of SC6 are over, I wonder who is the winner of 'Sudokucup 6'?

US Puzzle Championship 2011

The 2011 US Puzzle Championship was held on 27th August, 2011.

View Championship Page

USA Results

1. Palmer Mebane (USA) - 415
2. Thomas Snyder (USA) - 349
3. William Blatt (USA) - 309

Complete Results

This was my first 'complete' USPC. Since it is midnight in India during USPC, I dozed off last two years.

Congrats to Palmer Mebane for ending Thomas Snyder's five-year reign at the USPC! Both of them have been performing consistently well in championships throughout the year, and I'm sure they would be among the top guns at the WPC in Hungary.

You can read more about the championship on the champions' blogs:
Thomas Snyder's views
Palmer Mebane's views

Looking forward to meet you'll and your team in Hungary.