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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

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


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

The list of puzzles that appeared in the test are:

Horse Snake
Pointing Evens Sudoku
Star Battle


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


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'?