Indian Sudoku Championship - Mock Test 14

The 14th Mock Test in preparation for the World Sudoku Championship 2010 was held on 28th February, 2010. The mock test started at 20:00 IST (14:30 GMT) on 27th February and it was open for 24hrs.
It was organised by TTHsieh and Minfang Lin (Part 1) and Oddest (Part 2).

Download Instruction Booklet (Part 1)
Download Instruction Booklet (Part 2)
Download Puzzle Booklet (Part 1)

Password is XinQiji
Download Puzzle Booklet (Part 2)

Password is LanTerN


The list of sudokus that appeared in the test are:

Part 1
1. Classic Sudoku

Part 2
1. Windoku
2. XV Sudoku
3. Average Sudoku
4. Odd Neighbour Sudoku
5. Jigsaw Sudoku
6. No Knight Step Sudoku
7. Diagonal Sudoku
8. All Odd/All Even Sudoku
9. Consecutive Sudoku
10. Greater/Less than Sudoku

Results

1. Zafer Huseyin Ergan (Turkey) - 790

2. Maruska Benediktova (Czech Republic) - 630

3. Chen Chen (China) - 530

4. Jakub Hrazdira (Czech Republic) - 510

5. Baris Cakmak (Turkey) - 500

6. Gaurav Korde (India) - 460

7. Jan Mrozowski (Poland) - 450

8. Rohan Rao (India) - 390

9. Kokanee () - 320

9. Tom Collyer (UK) - 320

Indian participants

6. Gaurav Korde (India) - 460

8. Rohan Rao (India) - 390

12. Amit Sowani (India) - 310

15. Rakesh Rai (India) - 270

18. Tejal Phatak (India) - 250

20. Ritesh Gupta (India) - 240

23. Poornima (India) - 210

23. Prashanth (India) - 210

34. Akash Doulani (India) - 140

35. Neeraj Mehrotra (India) - 130

Complete Results

There were totally 61 participants.

Congrats to everyone!

Tapa Variations Contest 3

The 3rd Tapa Variations Contest was held on 27th February, 2010 from 15:30 - 16:45 GMT (21:00 - 22:15 IST).

Download Instruction Booklet
Download Puzzle Booklet

Results

1. Philipp Weiß (Germany) - 962.2
2. Florian Kirch (Germany) - 807

3. Mehmet Murat Sevim (Turkey) - 766

4. Sebastian Matschke (Germany) - 710.4

5. Nikola Zivanovic (Serbia) - 696.5

6. Hideaki Jo (Japan) - 683.7

7. Andrey Bogdanov (Russia) - 682

8. Przemyslaw Debiak (Poland) - 670

9. Takuya Sugimoto (Japan) - 605

10. Taro Arimatsu (Japan) - 591.4

Indian participants

20. Amit Sowani (India) - 402.2

32. Rohan Rao (India) - 258

39. Rajesh Kumar (India) - 142.4

45. Rakesh Rai (India) - 59

Complete Results

There were totally 46 participants.

Congrats to everyone!

Solutions of Mock Test 13 Puzzles

Here are the solutions of the 13th Mock Test puzzles that was organised by Tejal Phatak and me.

Odd-Even No Touch Sudoku


Even Product Frame Sudoku


Consecutive Sum Frame Sudoku


Irregular Kropki Sudoku


Extra-Region Quadro Sudoku


Outside Anti Knight Sudoku


Odd Multiplication Table


Non-Consecutive Numeral Sudoku


Surprise Sudoku (Irregular Windoku Diagonal Sudoku


Sequences Equal Sum Skyscrapers Sudoku


Many participants were interested in the Outside Anti Knight Sudoku (which also happens to be my personal favourite among the 10 sudokus) so I'm sharing the method of how to go about solving the puzzle.
This was the puzzle.


Using the basic Outside Sudoku rules, you should reach this stage.


Filling up the '9's in the 9th, 6th, 4th, 5th boxes (in order), enables you to fill up the '3' and '8' in the 4th row, followed by the '3' in the 5th box.


In the 2nd row, '9' can only be placed in R2C5, which gives you the '9' in the 8th box. If you observe R6C3, it has to be '2'! (I guess this is the opening point of the puzzle :-) ) Proceeding, R8C3, it has to be '8'.


R5C3 has to be '7' followed by R2C3 being '5'. Observing the centre box, you should be able to fill '2', '8' and '6' using basic rules.


Observing the 2nd column, you will get '1' in R6C2, followed by the '6' in the 4th box. Observing the 7th row, you will get '6' in R7C7.


Observing the 1st box, '6' has to be in R2C2, and then you should be able to complete the 2nd row.


Using Anti Knight rule in the 6th box, the '2' and '7' is obtained. Using basic rules, you will get the '3's in the 9th and 8th boxes.


Using Anti Knight rule in the 8th box, the '2' and '7' is obtained, which will give you the '2's in the 7th and 9th boxes. Observing the 8th row, '7' has to be in R8C2, which will give you the '7' in the 9th box too.


'8' cannot be placed in R7C9 due to the positions of '8' in the 6th box. Hence R7C9 is '5'. Observing the 5th column, '5' has to be in R4C5. Solving the last two columns should get you here.


Using Anti Knight rule in the 5th box, R4C6 cannot be '1'. Hence, it is '4'. Using Anti Knight rule in the 3rd box, R3C7 cannot be '5'. Hence it is '7'. Solving the 1st and 3rd rows should get you here.


'8' has to be placed in R1C4 in the 2nd box. Using Anti Knight rule in the 3rd row (by the centre '6'), '6' has to be in R3C8. Putting '5' in R8C1 by Outside rules should help you finish the puzzle :-)

Indian Sudoku Championship - Mock Test 13

The 13th Mock Test in preparation for the World Sudoku Championship 2010 was held on 21st February, 2010. It was organised by Tejal Phatak and me.

Download the Instruction Booklet

Download the Puzzle Booklet

Password is EnjoyTheSudokuMix!

The list of sudokus that appeared in the test are:

1. Odd-Even No Touch Sudoku

2. Even Product Frame Sudoku

3. Consecutive Sum Frame Sudoku

4. Irregular Kropki Sudoku

5. Extra-Region Quadro Sudoku

6. Outside Anti Knight Sudoku

7. Odd Multiplication Table Sudoku

8. Non-Consecutive Numeral Sudoku

9. Surprise Sudoku (Irregular Diagonal Windoku Sudoku)

10. Sequences Equal Sum Skyscraper Sudoku

Results

1. Jan Mrozowski (Poland) - 910

2. Zafer Huseyin Ergan (Turkey) - 720

3. Jakub Ondrousek (Czech Republic) - 630

4. Jakub Hrazdira (Czech Republic) - 590

5. Gaurav Korde (India) - 570

6. Hideaki Jo (Japan) - 550

7. PupaMojaSliczna (Poland) - 480

8. Rishi Puri (India) - 470

9. Nikola Zivanovic (Serbia) - 460

10. Chen Chen (China) - 450

Indian participants

5. Gaurav Korde (India) - 570

8. Rishi Puri (India) - 470

11. Rajesh Kumar (India) - 420

21. Jaipal Reddy (India) - 270

28. Neeraj Mehrotra (India) - 190

32. Aditya Saraf (India) - 140

33. Akash Doulani (India) - 110

33. Abhishek Sharan (India) - 110

33. Sudhanshu (India) - 110

40. Poornima (India) - 80

Complete Results

There were totally 49 participants.

Congrats to everyone!

Thank You all for participating in the mock. I guess the puzzles were a little difficult, but I hope you enjoyed solving...

Looking forward to more in future :-)

Indian Sudoku Championship - Mock Test 12

The 12th Mock Test in preparation for the World Sudoku Championship 2010 was held on 14th February, 2010 from 14:30 - 16:00 IST (09:00 - 10:30 GMT).

It was organised by Deb Mohanty.

Download Instruction Booklet
Download Puzzle Booklet
Password is Wi4RaoZIm9

The list of sudokus that appeared in the test are:

1. Equal Product Sudoku
2. Symbol Sudoku
3. Snail Sudoku
4. 4 In A Row Sudoku
5. Sum Line Sudoku
6. Mini Diagonal Sudoku
7. Find X! Sudoku
8. Odd Or Even Count Sudoku
9. Touchy Sudoku
10. Symmetric Unequal Sudoku

Results

1. Jan Mrozowski (Poland) - 1165
2. Rishi Puri (India) - 1115
3. Chen Chen (China) - 1085
4. Jakub Hrazdira (Czech Republic) - 1055
4. Rohan Rao (India) - 1055
6. Gaurav Korde (India) - 1030
7. Fred Stalder (Switzerland) - 1005
8. Nikola Zivanovic (Serbia) - 925
8. Branko Ceranic (Serbia) - 925
10. Jakub Ondrousek (Czech Republic) - 890

Indian participants

2. Rishi Puri (India) - 1115
4. Rohan Rao (India) - 1055
6. Gaurav Korde (India) - 1030
13. Rakesh Rai (India) - 745
18. Ritesh Gupta (India) - 555
19. Amit Sowani (India) - 550
19. Tejal Phatak (India) - 550
21. Hitesh Gupta (India) - 525
22. Neeraj Mehrotra (India) - 510
25. Jaipal Reddy (India) - 395

Complete Results

There were totally 34 participants.
Congrats to everyone!

Tapa Variations Contest 2

The 2nd Tapa Variations Contest was held on 13th February, 2010 from 14:30 - 15:45 GMT (20:00 - 21:15 IST).

Download Instruction Booklet

Download Puzzle Booklet

Results

1. Ulrich Voigt (Germany) - 714

2. Florian Kirch (Germany) - 712.6

3. Nikola Zivanovic (Serbia) - 709.8

4. Sebastian Matschke (Germany) - 593

5. Philipp Weiß (Germany) - 585

6. Hideaki Jo (Japan) - 570.8

7.Tomasz Stanczak (Poland) - 431.2
8. Takeshi Kawasaki (Japan) - 428
9. Przemyslaw Debiak (Poland) - 415
10. Yuka Sugimura (Japan) - 411

Indian participants

13. Rohan Rao (India) - 381
36. Rajesh Kumar (India) - 140.8

Complete Results

There were totally 43 participants.
Congrats to everyone!

Rules of 'Equal Product Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. The given crosses mark groups of four cells in which two pairs of diagonally opposite numbers multiply to the same product.

EXAMPLE:


UNIQUE SOLUTION:

Russian Sudoku Championship 2010

The Russian Sudoku Championship 2010 was held on 7th February, 2010 from 14:00 - 15:40 GMT (19:30 - 21:10 IST).

Download Instruction Booklet

Download Puzzle Booklet

Password is rsc2010onl

Results

1. Jakub Hrazdira (Czech Republic) - 534

1. Hideaki Jo (Japan) - 534

3. Jan Mrozowski (Poland) - 528

4. Jakub Ondrousek (Czech Republic) - 522

5. Nikola Zivanovic (Serbia) - 516

5. Dave Petranick (USA) - 516

5. Stefan Gaspar (Slovakia) - 516

8. Rishi Puri (India) - 510

8. Rohan Rao (India) - 510

10. Sylvain Caudmont (France) - 504

Indian participants

8. Rishi Puri (India) - 510

8. Rohan Rao (India) - 510

21. Jaipal Reddy (India) - 390

25. Rakesh Rai (India) - 365

30. Tejal Phatak (India) - 354

Complete Results

There were totally 66 participants.

Congrats to everyone!

Tapa Variations Contest 1

The 1st Tapa Variations Contest was held on 6th February, 2010 from 15:30 - 16:45 GMT (21:00 - 22:15 IST).

Download Instruction Booklet
Download Puzzle Booklet

Results

1. Florian Kirch (Germany) - 710
2. Sebastian Matschke (Germany) - 671.6
3. Nikola Zivanovic (Serbia) - 655
4. Philipp Weiß (Germany) - 590
5. Przemyslaw Debiak (Poland) - 577
6. Jana Tylova (Czech Republic) - 540
7. Hideaki Jo (Japan) - 538
8. Andrey Bogdanov (Russia) - 522
9. Lukasz Bozykowski (Poland) - 507
10. Ruben Gafencu (Romania) - 504

Indian participants

14. Rohan Rao (India) - 302
28. Rajesh Kumar (India) - 168
29. Rakesh Rai (India) - 158

Complete Results

There were totally 51 participants.
Congrats to everyone!