The Logical World of Puzzles: March 2010

US Sudoku Championship 2010

The US Sudoku Championship - 2010 will be held on 28th March, 2010 at 13:00 EDT (22:30 IST).

Results

1. Jason Zuffranieri (USA) - 409
2. Yuhei Kusui (Japan) - 383.167
3. Nikola Zivanovic (Serbia) - 379.083
4. Ours Brun (France) - 359.958
5. Allen Kong (USA) - 340.708
6. Jonathan Rivet (USA) - 340.458
7. Jim Schneider (USA) - 335
8. Branko Ceranic (Serbia) - 320
9. William Blatt (USA) - 315.208
10. Chris Narrikkattu (USA) - 315

Visit championship page for more details.

Indian Sudoku Championship - Mock Test 18

The 18th Mock Test in preparation for the World Sudoku Championship 2010 was held on 28th March, 2010. The mock test started at 20:00 IST (14:30 GMT) on 26th March and it was open for 24hrs.
It was organised by Branko Ceranic (Skywalker).

Download Instruction Booklet
Download Puzzle Booklet
Password is gat18cumo

The list of sudokus that appeared in the test are:

Relay
1. Diagonal Sudoku
2. Killer Sudoku
3. Irregular Sudoku
4. Classic Sudoku
5. XV Sudoku
6. Anti Knight Sudoku

Variants
7. Alphabet Sudoku
8. Odd Sudoku
9. Classic Sudoku
10. Killer Sudoku
11. Neghbours +N Sudoku
12. Non-Consecutive Sudoku
13. Classic Sudoku
14. Big Bands Sudoku
15. Irregular Disjoint Sudoku
16. Windoku

Results

1. Chen Chen (China) - 1600
2. Rishi Puri (India) - 1430
3. Florian Kirch (Germany) - 1310
4. Gaurav Korde (India) - 1300
4. Rohan Rao (India) - 1300
6. Ce Jin (China) - 1160
7. Amit Sowani (India) - 1080
8. Fred Stalder (Switzerland) - 947
9. Zafer Huseyin Ergan (Turkey) - 939
10. Kokanee () - 921

Indian participants

2. Rishi Puri (India) - 1430
4. Gaurav Korde (India) - 1300
4. Rohan Rao (India) - 1300
7. Amit Sowani (India) - 1080
14. Rakesh Rai (India) - 834
14. Jaipal Reddy (India) - 834
19. Tejal Phatak (India) - 824
24. Neeraj Mehrotra (India) - 705
26. Akash Doulani (India) - 618
37. Sudhanshu Pandey (India) - 407

Complete Results

There were totally 47 participants.
Congrats to everyone!

Puzzle No.298

This is a Multiplication Table Sudoku.

PUZZLE NO.298: MULTIPLICATION SUDOKU

SOLUTION:

Puzzle No.297

This is a No Even Neighbours Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.297: NO EVEN NEIGHBOURS SUDOKU

SOLUTION:

Puzzle No.296

This is an Even Sudoku made by Deb Mohanty.

PUZZLE NO.296: EVEN SUDOKU

SOLUTION:

Puzzle No.295

This is a Classic Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.295: CLASSIC SUDOKU

SOLUTION:

Puzzle No.294

This is a Classic Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.294: CLASSIC SUDOKU

SOLUTION:

Puzzle No.293

This is an Anti Diagonal Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.293: ANTI DIAGONAL SUDOKU

SOLUTION:

Puzzle No.292

This is an Outside Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.292: OUTSIDE SUDOKU

SOLUTION:

Puzzle No.291

This is a Descriptive Pairs Sudoku made by Gaurav Korde.

PUZZLE NO.291: DESCRIPTIVE PAIRS SUDOKU

SOLUTION:

Puzzle No.290

This is a Mirror Sudoku made by Gaurav Korde.

PUZZLE NO.290: MIRROR SUDOKU

SOLUTION:

Rules of 'Descriptive Pairs Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. Each pair of digits A and B on the outside means that at least one of the following are true in the row/column:
a) There is a digit A in the Bth cell
from the edge.
b) There is a digit B in the Ath cell
from the edge.

EXAMPLE:

UNIQUE SOLUTION:

Rules of 'Mirror Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. The 1st and 9th boxes, and the 3rd and 7th boxes are mirror images of each other.

EXAMPLE:

UNIQUE SOLUTION:

Puzzle No.289

This is a Group Sum Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.289: GROUP SUM SUDOKU

SOLUTION:

Puzzle No.288

This is an Outside Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.288: OUTSIDE SUDOKU

SOLUTION:

Puzzle No.287

This is a Group Sum Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.287: GROUP SUM SUDOKU

SOLUTION:

Puzzle No.286

This is an Irregular Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.286: IRREGULAR SUDOKU

SOLUTION:

Indian Sudoku Championship - Mock Test 17

The 17th Mock Test in preparation for the World Sudoku Championship 2010 was held on 21st March, 2010. The mock test started at 20:00 IST (14:30 GMT) on 20th March and it was open for 24hrs.
It was organised by Jakub Hrazdira (Gotroch) and Maruska Benediktova (Cauchy).

Download Instruction Booklet

Download Puzzle Booklet 1

Password is R1exa7bero

Download Puzzle Booklet 2

Password is R2snuotn3y

The list of sudokus that appeared in the test are:

Round 1 (Relay)

Relay 1

1. Classic Sudoku

Relay 2

1. Diagonal Sudoku

2. Anti Knight Sudoku

3. Untouch Sudoku

4. Non-Consecutive Sudoku

5. Quadro Sudoku

Round 2 (Variants)

1. Arrow Sudoku

2. Pandigital Sudoku

3. Fortress Sudoku

4. No Four In A Row Sudoku

5. Outside Killer Sudoku

6. No Operations Mathdoku

7. Loop Sudoku

Results

1. Jan Mrozowski (Poland) - 840

2. Jakub Ondrousek (Czech Republic) - 720

3. Rohan Rao (India) - 715

4. Chen Chen (China) - 675

5. Branko Ceranic (Serbia) - 665

6. Fred Stalder (Switzerland) - 630

6. Florian Kirch (Germany) - 630

8. Rishi Puri (India) - 615

9. Sylvain Caudmont (France) - 605

10. Gaurav Korde (India) - 550

Indian participants

3. Rohan Rao (India) - 715

8. Rishi Puri (India) - 615

10. Gaurav Korde (India) - 550

18. Tejal Phatak (India) - 465

21. Jaipal Reddy (India) - 410

27. Rakesh Rai (India) - 325

29. Amit Sowani (India) - 305

30. Neeraj Mehrotra (India) - 295

31. Ritesh Gupta (India) - 290

39. Rajesh Kumar (India) - 230

Complete Results

There were totally 56 participants.

Congrats to everyone!

Indian Sudoku Championship - Mock Test 16

The 16th Mock Test in preparation for the World Sudoku Championship 2010 was held on 14th March, 2010. The mock test started at 20:00 IST (14:30 GMT) on 13th March and it was open for 24hrs.
It was organised by Amit Sowani and Kshitij Sharma.

Download Instruction Booklet

Download Puzzle Booklet

Password is RandPass

The list of sudokus that appeared in the test are:

1. Battleship Sudoku

2. Skyscraper Sudoku

3. Sudokuro

4. Minesweeper Sudoku

5. Domino Sudoku

6. Easy As Sudoku

7. Mastermind Sudoku

8. Word Search Sudoku