Non Main Diagonals Sudoku 2013 - 1

Today we will try out another sudoku which will be appearing in the 8th World Sudoku Championship which is scheduled for next week.

This is a Non Main Diagonal Sudoku. Rules of Classic Sudoku apply. Additionally digits do not repeat on any of the marked diagonals.

ISO Sudoku 2013 - 1

Today I have created an Iso Sudoku as a practice puzzle for the upcoming World Championships. This is definitely a hard puzzle.

Fill in the grid so that every row, column, and 3×3 box contains the digits 1 through 9. Digits do not repeat along any of the three directions in which the hexagonal cells share edges.

Pyramid Sudoku 2013 - 1

Today we will have a puzzle from the WSC 2013 IB. This is a pyramid sudoku, It is nothing but an extension of an Extra region sudoku.

Rules of Classic Sudoku apply. Additionally regions marked in grey contain digits 1 to 9 without any repetition.

Arrow Sudoku 2013 - 1

As promised we have an arrow sudoku today. This is the first Arrow Sudoku that I am posting on the blog and thanks to PS for reminding me that I had never done an arrow sudoku before. This is of medium difficulty and not too tricky, well not too obvious either and i wanted to maintain the symmetry of the givens too.

Rules of Classic Sudoku apply. Additionally digits in the circle are equal to the sum of the digits along the arrow from it. Digits may repeat on an arrow.

Even Odd Skyscraper 2013 - 3

Today we have an Even Odd Skyscraper Sudoku. Some one reminded me that I have not put up an Arrow Sudoku on my blog so that will definitely be up here next week. However for this week we will stick to the Even Odd Skyscraper.

Place numbers in the grid such that each row, column and 3x3 box contains the numbers 1 to 9. Each number represents the height of the skyscraper in each cell. The digits outside the grid indicate the number of skyscrapers seen from the corresponding direction. Taller Skyscrapers hide shorter ones. Shaded cells inside and outside the grid can contain only even digits.

Killer Sudoku 2013 - 5

Today we have a killer sudoku for the daily league.

Rules of classic sudoku apply. Additionally, digits on the top of a cage denote the sum of the digits in the cage. Digits do not repeat in the cage.

Diagonal Sudoku 2013 - 4

Todays puzzle for the daily league is a Diagonal Sudoku.

Rules of Classic Sudoku apply. Additionally digits do not repeat on the two main marked diagonals.

Diagonally Non-Consecutive Sudoku 2013 - 2

Things are looking up for the sudoku and puzzle scene in India. Sportz Consult, a group interested in puzzles and sudoku is conducting  contests around various cities. I will be in Chennai this weekend coordinating one of the events. Lets see how things shape up.

Today's puzzle is a Diagonally Non-Consecutive Sudoku for the Daily League.

Rules of Classic sudoku apply. Additionally, diagonally adjacent cells cannot contain consecutive digits.

Multi Diagonal 2013 - 1

Todays puzzle for the Daily League is a One way multi diagonal. Rules of Classic Sudoku apply. Additionally the digits cannot repeat on the marked diagonals. Its a bit hard.

Non-Consecutive Sudoku 2013 - 5

Here is a difficult Non-Consecutive Sudoku for the Daily League.

Rules of Classic Sudoku apply. Additionally orthogonally adjacent cells cannot contain consecutive digits.

Times Sudoku Championship Review 2013

I think today I will just write about the Times Sudoku Championship in India which took place last weekend to determine Team India for the WSC 2013 to be held in China.

The prelims were conducted across 4 cities in India and top four from each location were invited to the finals.

The finals were preponed to 2nd August making it crazy to have it on a weekday. I was not even sure I would go as it clashed with the Annual Day celebrations at my sons school. However a few people, which included my wife, Jaipals Wifecompelled me to go and I booked my tickets at the last minute.

The only thing wrong about it was that all candidates outside of Mumbai had flights early in the morning, which meant that all of us had to be up by 3am to get ready and reach the airport in time to catch their respective flights. This can actually be physically taxing and mentally draining as the tournament progresses.

Anyways we all reached the airport in time and it was great catching up with all the finalists. Quite a few techniques and ideas were exchanged.In the name of breakfast a sandwich and a cup of tea/coffee was arranged and the competition began at 9am. Funny thing was there were no tables. Just chairs which had small writing desks attached to it as we have at most colleges and universities. Being a left handed person this was inconvenient for me and I decided to sit on the floor and solve the puzzles.

The first round was a sprint round consisting of 16 6x6 sudokus. There were pairs of classics followed by regular variants. The sprint round was of 25 minutes. IT was a nice sprint. I got stuck in a killer, for which I was kicking myself later as I wasted about an extra 2 minutes on it. I completed them all in 20 minutes but spent around 3 minutes checking to make sure there were no errors. I submitted with 2 minutes to spare. Rohan and Prasanna also completed the round but they also checked for errors and they submitted without any time remaining for bonus. So I assumed if all of us have correct entries then I have gained a vital 20 point lead over them due to the time bonus.

After a quick 10 minute break. The second round of Classic Sudokus began. 8 sudokus to be completed in 45 minutes. Now PS, Rohan and I are all strong and we were seated in a single file. I was ahead, with PS sitting behind me and Rohan bringing up the rear. We all began in earnest and Rohan was the first to submit with 13 minutes remaining. I finished a minute later but then again spent 2 minutes checking for errors and finally submitted with 10 minutes remaining. PS completed, checked and submitted with no bonus. No scores had been announced as yet so keeping the assumption that no mistakes by any of us, I had a cumulative time bonus of 12 minutes, Rohan had 13 minutes and PS none. Jaipal reddy in the mean time had completed round two with 2 minutes to spare. Which meant Rohan had taken a 10 point lead over me.

Another short 10 minute break and Round 3(Variants) started. No scores of previous rounds yet. This was the round where my body and mind started acting up due to the early morning flight. We had 8 variants to complete in 60 minutes and Prasanna came back with a vengeance. He completed it with a whopping 20 minutes to spare. Rohan completed with 11 minutes to spare. I got stuck on an Irregular and the mind just went blank. Left it and finished the last 2 puzzles before coming back to the Irregular. The moment I came back to the puzzle the opening was staring me right in the face and I quickly finished it. I submitted with 8 minutes remaining. Which means at the end of Round 3, Prasanna and I both had a cumulative time bonus of 20 minutes and Rohan with 24 minutes time bonus. Which meant Rohan was ahead of us by 40 points with PS and I joint second.

We broke for lunch and when we came back yet no points displayed. So we had no clue or idea as to where we stood. The fourth Surprise round was basically a mechanical sudoku. 9 tiles to be placed and the Squared Outline Sudoku to be solved in 50 minutes. Now this is more of a puzzle than a sudoku which is definitely not a sudoku. There was no time bonus in this round, just position bonus. The first person to finish would get 50 points bonus and the fifth person getting 10 minutes bonus. Now I knew with Rohan and Prasanna being really strong in puzzles I had no chance of catching up with them and mentally resigned myself to the third position. Rohan was the first to submit.and then with the clock reading 29 minutes into the puzzle I submitted. I was surprised to see that I was the second person to finish behind Rohan. It was a wonderful puzzle with a great break in. Prasanna was the third to complete but I was atleast assured that I had taken a 10 point lead over him and would be second in the worst scenario. Jaipal was the fourth person to finish this puzzle. Now all we had to do was anxiously wait for the final results and the final points tally.

Deb in the mean time had computed the results and within 5 minutes of end of round 4 the results were announced. Jaipal having finished 2 complete rounds was announced the fourth placed competitor with 1205 points, as was expected. Then to everyones surprise the third place went to Rohan with 1750 points. It seems he had made 3 errors in Round one which cost him 90 points.Prasanna got the second place with 1750 points again as he had also made an error in Round one costing him 30 points. Since Prasanna had a better score in the variant round he was placed ahead of Rohan. I breathed a sigh of relief when I was announced the winner with 1790 points. Biggest plus for me over the last couple of years in international events has been my ability to control and eliminate all the stupid mistakes I would make. Finally it was a great feeling to be on top in India. So the Indian team comprises of me, Prasanna, Rohan and Jaipal. This in my view is a really strong team which can give the other top countries a run for their money in the team championship.

So Team India go give it your best shot.

Odd-Even Anti-Knight Sudoku 2013 - 1

A hurriedly made even odd sudoku with the anti-knight constraint.

Rules of classic sudoku apply. Grey cells can contain only even digits. A digit cannot repeat at a cell which is at a knights step from itself.

Squared Outline Sudoku 2013 - 1

Today we will tackle another variant which is expected at the Times Sudoku Championship this weekend.

Rules of Classic Sudoku apply. Additionally, No digit can repeat on any of the marked diagonals.

Odd Sum Sudoku 2013 - 1

With the Times Sudoku Championship finals slated for this weekend, there were a few requests for an Odd Sum Sudoku. I managed to create an easy one as time is short. So have a go at it.

Rules of Classic Sudoku apply. Additionally adjacent cells marked in grey always will have digits whose sum is an odd number.

Non-Consecutive Sudoku 2013 - 4

Ok, having done with experimenting on Trio sudokus, it is time to get back to normal variants. This is keeping in mind the Finals of the Times Sudoku Championship.

So today we have a look at a Non-Consecutive Sudoku.

Rules of classic Sudoku apply. Additionally orthogonally adjacent cells cannot contain consecutive digits.

Trio Knights Non Consecutive Sudoku 2013 - 1

In continuation of twisting up the Trio, I decided to take it a step further. Thought why not try it with a Knights Non-consecutive constraint. This has turned out better than yesterdays twist.

Rules of classic Sudoku apply. Cells which are at a Knights step from each other cannot contain consecutive digits. Grey cells can contain only the digits 1,2 and 3. Yellow cells can contain only the digits 4,5 and 6.

Trio - NC Sudoku 2013 - 1

Trio Sudoku has always been one of the basest of Sudokus. Its like three different set of sudokus rolled into one. I was just sitting and wondering how I could make the three individual sets interact and decided to add the Non-Consecutive constraint to it. The result was quite pleasing and here is a Trio with a Twist.

Rules of classic sudoku apply. Additionally orthogonally adjacent cells cannot contain consecutive digits. Grey cells can contain only the digits 1,2 and 3. Yellow cells can contain only the digits 4,5 and 6.

Killer Sudoku 2013 - 4

Today we will try and tackle a Killer Sudoku. It is kind of hard getting into a mode of creating a sudoku daily after a long hiatus. Hope people dont find it too tough.

Rules of Classic Sudoku apply. Additionally, the number on the top left corner of the cage is the sum of all the digits in that cage. Digits are not repeated inside a cage.

Diagonal Sudoku 2013 - 3

Well, Its time I restarted posting on the blog. With the regional rounds of the Times Sudoku Championship underway, 2 rounds have been completed and two more to be conducted over the coming weekend. Top 4 players from each region will take part in the finals at Mumbai on 3rd August.

Winning the Chennai round was quite satisfying on a personal front. Irrespective of the competition, I was more concerned with accuracy and my solving speed. Leaving nothing to chance I spent a whopping 7 minutes in round 2, checking to make sure that there were no errors or blank cells, mistakes which I have made plenty in the previous years. Was glad to see that no such issue had occurred and I had all correct. The final will be a different ball game altogether and I look forward to renew the battle with Rohan, and Prasanna now amongst the fore runners, its going to be an interesting battle. It bodes well for the Indian team if we all qualify as that would ensure a really strong Indian team at the WSC.

Todays puzzle is a bit tricky Diagonal sudoku. Lot of people found the Diagonal Sudoku in the Chennai round to be tough and asked me to post something related to Diagonal Sudoku. Please feel free to try it and if stuck do not hesitate to mail or ask me on the blog.

Asterisk Sudoku 2013 - 2

Today we have a hurriedly made Asterisk Sudoku.

Rules of classic sudoku apply, additionally marked cells contain unique digits 1 to 9.

Sudoku Mania App for Android.

Finally the day has arrived. The app has been approved and published on the Google Play Store and it is available for download on Android Smartphones and tablets. A lot of efforts have gone into it to provide as many variants as possible in the app. No other app has provided so many variants and combined with the fact that all sudokus are hand crafted and not a single puzzle has been computer generated, We are pleased with the end result.

Since this is version 1.0 and we have done as much testing as possible, however as users you might come across a bug or even if there is no bug, we would value your suggestions deeply to enhance the solving experience. So any feedback, be it Good, Bad or Ugly(Creative Criticism) is most welcome and looked forward too.

The app can be downloaded at here. Alternatively you can also search the Goople play store on your phone/tablet by word Sudoku Mania, or by my name or any of the variants provided in the app.

Here is to happy solving. Enjoy!!

No Donkey Step Sudoku 2013 - 2

Today for the Daily league we have a No Donkey Step Sudoku.

Rules of Classic Sudoku apply. Additionally, a digit cannot repeat within 2 cells from itself in any of the 8 directions.

Killer Sudoku 2013 - 3

Today we have a Killer Sudoku for the Daily League. And as always if someone prefers to solve it online, then it will be available at www.sudokucup.com under the guest leagues' section on April 19th.

My write ups are short as there is a lot of time being devoted to the launch of the app which will be very soon. I am eagerly awaiting it and so are many others who have been kind enough to respond.

So Happy solving :)

Classic Sudoku 2013 - 4

Today we have a Classic Sudoku which is also available on the Sudoku Mania app.

This coming week will feature puzzles from the app. One puzzle from each of the variants available in the app. So the image of the puzzle will actually be a screenshot of the app with the puzzle displayed.

Happy Solving.

Sudoku Mania App Home Screen

Below is the home screen shot of the Sudoku Mania App. This is a screenshot of the app on an Android Device. The app can run on any android device having an OS version of 2.0 + at the bare minimum.

More Screenshots will be coming in soon till the app store takes its time to approve and it is ready for download. Hope you all enjoy this app as much you have enjoyed solving puzzles on my blog.

Non-Consecutive Sudoku 2013 - 3

A Couple of years back I had seen a Non-Consecutive Sudoku by Thomas Snyder where only 2 digits were used as clues. Somehow I remembered that puzzle on last Sunday and decided to try it. The result is for you to judge once you solve it.

I know I have not been spending as much time on the blog as I would like too, but then I have been busy working on the SudokuMania app for smart phones and tablets, which would be available for download soon.

Rules of classic sudoku apply. Additionally, adjacent cells cannot contain consecutive digits.

Sudoku Mania App

A collection of Hand-made sudokus are coming soon to a smart phone or a tablet near you. 

Keep watching this space.

Diagonally Non-Consecutive Sudoku 2013 - 1

Today we have a Diagonally non-Consecutive Sudoku.

Rules of Classic Sudoku apply. Additionally, diagonally adjacent cells cannot contain consecutive digits.

Palindrome Sudoku 2013 - 1

Today we have a Palindrome Sudoku for the Daily League.

Last week was good performance wise for me at the Daily League.

Last Friday was a Twodoku by Tom Collyer.
Saturday saw a Kid Sudoku by Bram, which was one of my favourites from last week.
Sunday was an Outside Sudoku by Kwaka.
Monday we had a Sum or Product Outside Sudoku by Min Young Joo.
Tuesday was Prasanna's Consecutive Sudoku.
Wednesday was Bastien's Irregular Sudoku, which I still have to solve.

Another big step for the League was taken with the help of Karel Tesar who manages the sudokucup.com website. The league puzzles are available online on their website for solving, so if anyone wants to try the puzzles online without having to print them, then sudokucup.com is the website you need to visit. :)

The rules of Palindrome sudoku are the same as a classic sudoku. Additionally digits along the given lines read the same when read from either direction on the line.

Even Odd Skyscraper Sudoku 2013 - 1

Today's puzzle is one of my favorite creations. I don't think I have spent more time on any puzzle than I have spent on creating this sudoku for the Daily League. I know I am putting up a sudoku once a week on the blog as against a daily puzzle but believe me that there is good news in the offing soon. :)

Last Friday was Tom Collyer's Diagonal Sudoku.
Saturday was Bram's Sum Sandwich Sudoku, in preparation for an upcoming LMI Contest.
Sunday was Kwaka's Rossini Sudoku with Disjoint group constraints.
Monday was Fred's Irregular Sudoku.
Tuesday was Prasanna's Weighted Killer Sudoku.
Wednesday was Bastien's Thermo Sudoku.

Today for the Daily League we have an Even Odd Skyscraper. Place numbers in the grid such that each row, column and 3x3 box contains the numbers 1 to 9. Each number represents the height of the skyscraper in each cell. The digits outside the grid indicate the number of skyscrapers seen from the corresponding direction. Shaded cells inside and outside the grid can contain only even digits.

Happy Solving. :)

AntiKnight Sudoku 2013 - 3

Today is an Anti-Knight Sudoku for the Daily league. Things have been hectic and hence the puzzle updates for blog have become infrequent. Soon there will be a news update for all so keep watching this space.

On the Daily League, we have had a splurge of great puzzles as always. I haven't solved any this week, but indeed to do it later this weekend.

Friday was Tom Collyer's 8 is still alive which was renamed as A Date with 8. I will take credit for that :)
Saturday was Bram's 10 Box Sudoku.
Sunday was Kwaka's Odd Sudoku.
Monday was Fred's Diagonally NonConsecutive Sudoku.
Tuesday was Prasanna's Galloping Horses.
Wednesday was Bastien's Figure Sudoku.

Rules of Classic Sudoku apply. Additionally, a number cannot repeat at a cell which is at a Knight's step, as in Chess, from itself.

Anti-knight Sudoku 2013 - 2

Today is an Anti-Knight Sudoku for my dear friend Tom Collyer. You will find a few of them cropping up quite frequently in the coming few days.

Rules of classic sudoku apply. Additionally, a digit cannot repeat at a cell which is at a knight's step from itself.

Even Odd Chessdoku 2013 - 2

Today we have another Chessdoku, but this time it also doubles up for the League's puzzle. The week has started off interestingly with some great puzzles Arrow Sudoku by Fred, Search 9 by Prasanna and a Renban Sudoku by Bastien.

I hope the chessdoku lives up to the level set up by the previous authors for the week. This is not a difficult puzzle but then it does require a wee little bit of thinking.

Fill the grid such that every row, column and 3x3 box contains the digits 1 to 6, a Chess King(K), Queen(Q) and Knight(N). Additionally, a King cannot attack another King, a Queen cannot attack another Queen and a Knight cannot attach another Knight. Each piece following their moves as in chess. Grey cells can contain only even digits and the orange cells can contain only odd digits.

Summer Magic 2013 - 1

Kwaka beat me to the the summer magic sudoku at the daily league.

Fill the grid such that every row, column and 3x3 box has digits 1 to 6 and 3 blank cells in it.Numbers outside the grid show the total of all numbers appearing in corresponding rows and columns. These numbers are separated by at least one empty cell. Example: 12_3_456__ = 471; 6543__21_ = 6564.

EvenOdd chessdoku 2013 - 1

I was just dabbling with an idea for the Chessdoku and thought why not add the even odd constraint, which will help reduce the number of givens drastically. Here is the result.

Fill the Grid such that the digits 1 - 6, King(K) Queen(Q) and Knight(N) occur once in every row, column and 3x3 box. Grey cells can contain only the even digits, yellow cells can contain only odd digits.

A Chess King cannot attack another King, a Knight cannot attack another Knight and a Queen cannot attack another Queen.

AntiKnight-Nonconsecutive Sudoku 2013 - 2

Last one week has been  hell and effects are still there on my health. Still not completely recuperated but atleast able to login and get back to some sudoku creation. Hopefully there won't be any more disruptions in the puzzling activities.

Today's puzzle is also part of my contribution towards the Daily League group on FB. It is an Anti-Knight Non-Consecutive Sudoku.

another development for the daily league is that now all people will be able to solve our puzzles online at the sudokucup.com website. I will be posting links and more details on that shortly today. In the mean time enjoy this puzzle for today.

Rules of Classic Sudoku apply. Additionally, consecutive numbers cannot occupy orthogonally adjacent cells and a digit cannot repeat at a knights step from itself. Basically a nonconsecutive sudoku and an antiknight sudoku rolled into one.

Little Killer Sudoku 2013 - 1

It has been a one hell of a tiring week. Too much of travelling and sudoku creation for a few championships. I am packing my bags for another bit of travel as I get ready to upload this puzzle. This Little Killer Sudoku serves the Daily League at FB as well as practice for the WPF GP that takes place this weekend on the German website.

At the Daily league wed had a wonderful start with an Equal Sudoku by Cristoph. A very well made sudoku. Tuesday was Prasanna's turn with a Between 1 and 9 sudoku which was again very well made with only two given hints. Wednesday was Bastien's Fortress Sudoku.

For the Little Killer, apply standard sudoku rules. Additionally, digits outside the grid denote the sum of all digits in the corresponding direction of the arrow.

Classic Sudoku 2013 - 3

Today is a hurriedly made Classic Sudoku due to lack of time.

Fill the grid such that each row, column and 3x3 box has the digits 1 - 9.

Irregular Non-Consecutive Sudoku 2013 - 2

Lets solve this Irregular non-Consecutive Sudoku as practice for the German leg of the WPF GP.

Every Row, Column and irregular shaped regions must contain the digits 1 to 9 without any repetition. Additionally, horizontally and vertically adjacent digits cannot be consecutive.

Search 9 Sudoku 2013 - 1

Today we will attempt to solve a Search 9 Sudoku as practice for the Third leg of the WPF GP.

Rules of Classic Sudoku apply. Additionally, arrows in a cell point towards the digit 9. The number 9 is always at a distance equal to the digit in the cell with the arrow. All possible arrows are marked.

Anti-Knight Sudoku 2013 - 2

Valentines day is a day of Love. Every Damsel has her Knight in shining armour. In order to avoid Knights fighting over a pretty damsel, we have today a Valentine special  Anti-Knight Sudoku.

Rules of Classic Sudoku apply. Additionally a number cannot repeat at a cell which is at a knight's step from itself.

Consecutive Sudoku 2013 - 2

The Second leg of the WPF Grand Prix is over. There was nothing new to the puzzles. They were obviously of the highest quality that we have come to expect from Deb over the years. Kudos for the wonderful set. The results were much better than expected. I ended up 6th which was nice to see for a change.

The best puzzle that I liked was the Even Odd Big Small Sudoku. The twist of determining the application of symbols was truly a masterstroke. I personally prefer sudokus that make a solver think instead of just rushing with filling in the numbers. Part of this could be because I am not as fast as some of the solvers in the world like Jakub O, Tiit, Jan M to name a few. So when Sudokus make a solver pause and think, gives players like me a chance to catch upas I feel that is my strength.

With the third leg in less than 2 weeks away, it is time to start practicing for them. In case you have not downloaded the Ib, it is available at this link. The third leg is being conducted by the Germans and you may want to register at their website, incase you have not already done so.

So to begin the practice for that, we start of with an easy-medium level Consecutive Sudoku.

Rules of Classic Sudoku apply. Additionally, cells sharing a border with a thick line can contain only consecutive digits. Cells without the thick border cannot contain consecutive digits. Happy Solving.

Even Odd Jigsaw 2013 - 1

Today we will have an Even Odd Jigsaw Sudoku. Its your typical Jigsaw sudoku with cells having even digits marked in grey.

Fill the Grid such that every, row, column and irregular shaped box contain the digits 1 to 9. Additionally, cells marked grey can contain only even digits.

Killer Sudoku 2013 - 2

The WPF GP has started at the LMI site today. This is my last contribution towards practice. Today its a Killer Sudoku.

Rules of classic Sudoku apply. Additionally, numbers at the top of a cage denote the sum of the digits inside the cage. A digit cannot repeat inside a cage.

Quad Sum Sudoku 2013 - 1

Initially I had thought of posting a Killer Sudoku today for the GP Practice. Then I realised that a Killer Sudoku would be readily available to all. So I decided to create a Quad Sum Sudoku.

This is of an Easy-Medium Difficulty level and should not take more than 5 minutes for an average solver. Top solvers should easily be able to crack it in under 3 minutes.

Rules of Classic Sudoku apply. Additionally, a circle at a corner implies that 1 digit is the sum of the other 3 digits around that corner.

Toroidal Sudoku 2013 - 1

In continuation with providing practice puzzles for the WPF GP, today we have a medium level Toroidal Sudoku.

This is an 8x8 Sudoku. Ensure that every row, column and irregular shaped regions contain digits 1 to 8. some regions wrap around the grid and are shown open ended.

Enjoy.

Trio Sudoku 2013 - 3

With a Splurge of tough puzzles at the Daily League, I decided to have an easy Trio sudoku for the speed freaks :) ( No ill intention intended towards anyone)

Rules of Classic Sudoku apply. Additionally, cells having circles can contain only the digits 1,2 or 3. Cells will rectangles can contain only the digits 4,5 and 6.

XV Sudoku 2013 - 1

We are in the middle of the week with just 3 more days left to go for the second leg of the WPF GP. Hope the sudokus are of help and it is time to move ahead from easy puzzles to medium difficulty level puzzles that make you think a wee little bit.

Today we will attempt an XV sudoku.

Rules of classic sudoku apply. Additionally, if there is a "v" between two cells then the digits of those cells add upto 5. If there is a "x" then the digits of those 2 cells add upto 10.

Happy Solving.

Odd Sudoku 2013 - 1

In continuation to the preparation for the Grand Prix, today we are going to solve an Odd Sudoku. This is again an easy sudoku to familiarise people with the variant.

Rules of classic Sudoku apply. Additionally, cells marked grey can contain only the odd digits 1,3,5,7,9.

Odd Even Big Small Sudoku 2013 - 1

Next weekend we will see the second leg of the WPF initiated Sudoku Grand Prix to be hosted at the logicmastersindia website.

It is an innovative mix of puzzles and I would recommend everyone to try it. In order to prepare for the Grand Prix and also provide Practice material for all, I have decided to create sudokus which are going to be there in the actual competition. Karel at Sudokucup is also preparing some variants so I will not try and duplicate them, and will attempt to create examples of other variants.

To begin I have produced an Easy Level Odd Even Big Small Sudoku. Have deliberately kept it easy so that more and more people get accustomed to the rules of the sudoku and adapt themselves. Instead of the Japanese symbol notification, I have used the English Alphabet.

Every row, column and 4x2 box contains the digits 1 to 8 without any repetition. Additionally, The letters outside the grid denote the first two digits in the first two cells for that particular row or column.
E denotes even numbers. (2,4,6,8)
O denotes Odd numbers. (1,3,5,7)
B denotes Big Numbers (5,6,7,8)
S denotes small numbers (1,2,3,4)

Hope you enjoy this simple creation.

Non Consecutive Sudoku 2013 - 2

Today the Daily League completes 4 weeks. It has been a fun filled time. The week ends with another nice variation by Kwak. The booklet for week 4 will be available for download publicly in a few days time.

The second leg of the Sudoku Grand Prix being conducted by the WPF is going to take place at the LMI website next weekend. If you have not done so already then please register at the WPF site.

Till then we have a Non-Consecutive Sudoku today. I would rate it as medium difficulty level. Experts would take about four minutes to solve it, I would estimate.

Rules of Classic Sudoku apply. Additionally horizontally and vertically adjacent cells cannot contain consecutive digits.