Puzzle Ramayan – Loops


If there are some very very patient individuals who still keep tabs on this blog (and thanks for sticking around), I do plan to make it active again. This doesn’t necessarily mean I’ll start posting puzzles (I have too many other places to submit to these days), but there are some long overdue recaps for WSC-WPC 2015 which I plan to do, after which I’ll also review other contests which happen.

However, I expect all of this to happen only from April. The reason for this is I fell significantly behind schedule with my projects in 2015 for many different reasons, and I’ve been making ground in 2016 to get back to a position where I’m up to date with everything I’m doing. I estimate this to happen by the end of March, after which I’ll have more time for recaps and reviews.

The reason I’m posting this, other than acting as a random update, is to notify the readers about a Puzzle Contest happening this weekend on LMI. Its the 7th round of the ongoing series, Puzzle Ramayan. It is based on Loop puzzles, authored by me. We’ve targeted this tournament for newcomers and beginners, so in this round I’ve spent some time on the Instruction booklet and experimented with providing steps for solving the types appearing on the contest. We’re constantly looking at ways to encourage new solvers to participate, so if you’re new to puzzles and think this is a good way, let us know, by participating! ūüėČ

Contest Submission page with Instruction booklet – http://logicmastersindia.com/PR/201602/

Forum discussion – http://logicmastersindia.com/forum/forums/thread-view.asp?tid=1236

F.A.Q. – http://logicmastersindia.com/forum/forums/thread-view.asp?tid=381

I hope everyone participates and enjoys the contest!



Puzzle No. 509: Triomino Sudoku [Daily League]

I’ve got wayyy too much to do these days, so I’ve pretty much stopped any regularity on this blog. I might make the rare post though, like this one. I was a little bored of work and had some time so quickly explored this variant that’s part of the Indian Sudoku Championship which will be held online on LMI in about 13.5 hours. This one is pretty difficult (as are all variants I randomly and quickly post here when bored), but has some nice steps to get started.

Remember that you can solve the puzzles from the¬†League¬†online on the Sudokucup¬†Guest League¬†page with a 24h delay (though I’m not yet sure if this one can be supported there, but take a leap of faith, maybe it will be!).

Rules – Place a digit from 1 to 6 into each empty cell or blacken the cell so that each digit appears exactly once in every row, column, and outlined 3√ó3 region along with three black(shaded) cells. Each black(shaded) cell should be part of an orthogonally connected group of three blackened(shaded) cells (a triomino). No two triominoes can share an edge.




Puzzle No. 506 & 507: Trio Sudoku, Anti-Diagonal Sudoku [Daily League]

The Trio Sudoku is actually last week’s puzzle. I’d posted it on facebook but hadn’t posted it here. Thats rectified now. Its not the usual Trio Sudoku, but I prefer this slight tweak because it gives more to work with overall.

Remember that you can solve the puzzles from the¬†League¬†online on the Sudokucup¬†Guest League¬†page with a 24h delay. The Anti-Diagonal is today’s offering and will be the one appearing tomorrow on the online solver.

Also, a new puzzle genre I thought of debuted on GM Puzzles this past week. Its called Balance Loop. Have a go at these!

Balance Loop 1.

Balance Loop 2.

Balance Loop 3.

Rules for 506 –¬†Follow regular Sudoku rules. Additionally, Circles must contain only digits 1, 2 and 3. Small squares must contain only digits 4, 5 and 6. Diamonds must contain only digits 7, 8 and 9.

Rules for 507 –¬†Follow regular Sudoku rules. Additionally, each marked diagonal must contain exactly three distinct digits.




Puzzle No. 505: Anti-Clone Sudoku [Daily League]

I’ve had enough of Saturdays where I forget its a Saturday. The days I remember are usually Tuesday, Thursday and Sunday, for no specific reason other than that I’m weird. So, I’ve switched Sunday with Rajesh Kumar for the Daily League and I’m hoping that means I remember to post regularly.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules –¬†Follow regular Sudoku rules. The digits at the same locations on each shaded area must sum to 10. Shaded areas cannot be rotated or reflected.



Puzzle No. 504: Search 9 Sudoku [Daily League]

I’m back to the league this week and I hope that I’ll be back regularly now. Anyway, Search 9 Sudoku for today.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules –¬†Follow regular Sudoku rules. Additionally, each arrow points to the 9 in the respective row or column. The number in the cell with the arrow is the distance from the cell to the 9 in this row or column.




2014: Year in review – including links to my puzzles over the year

Hello dear readers,

I’ve not been that active on this blog this year. Aside from a few League posts, an ex-contest post here and there, and the 500th puzzle special, this blog hasn’t had much activity. So, in an effort to make amends, I’ll just list all the places you can see my puzzles from the year 2014, along with a few other thoughts.

The first notable change this year was obviously my inclusion as a Guest Contributor on GM Puzzles. We started out with a Countdown to the year 2014 and after a Tapa with a unique theme, we asked a question about the author, before the reveal. You can find all my contributions to the GM Puzzles Blog here. In addition to this, if you are a GM Puzzles patron, odds are, some of the rewards will contain my puzzles. Other than this, you can also visit the GM Puzzles bookstore for a direct purchase of some of the e-books, which also contain my puzzles. Currently, there’s a series of posts on GM Puzzles highlighting the best puzzles of 2014. I am really pleased to see two of my puzzles already showing in an entry.

Another place you can find my puzzles related to GM Puzzles is in Sudoku Spectacular by Penny Dell Puzzles. Thomas Snyder, Wei-Hwa Huang, Serkan Y√ľrekli and me have contributed a good number of variants to the title, including Tight Fit, Consecutive, Thermo, Arrow, Isodoku, etc. We have also contributed more Sudoku variants in a ‘Will Shortz’s Sudoku’ title by the same publications, set to be released soon, as mentioned here. So watch that space.

I also still had many projects with Logic Masters India. One of them was to start a Patron page of our own, and most of the Mini Packs and Main Packs available here contain my puzzles, along with a few puzzles by other Indian authors like Deb Mohanty, Ravi Kumar Macherla, Swaroop Guggilam and Ashish Kumar.

I also authored/organized/co-authored multiple contests on LMI this year. Here’s a list:

Parallel Universe: An LMI Monthly Sudoku test for the month of April, based on a unique concept.

Parallel Universe II: An LMI Monthly Puzzle test for the month of April, based on the same concept with slight differences.

Indian Puzzle Championship 2014: I organized this tournament with the help of some other top quality authors, and wrote some puzzles for the competition too.

Indian Sudoku Championship 2014: My contribution here was the same as with IPC above.

World Practice Championship Day 1 & World Practice Championship Day 2: Rohan Rao’s idea to have an LMI Test featuring one of the WPC rounds snowballed spectacularly into a contest featuring all 100+ puzzle types appearing in the World Puzzle Championship 2014, where I contributed quite a few puzzles.

Beginners’ Contest August 2014: Based on a patron request, I authored this Beginners’ Contest exploring the puzzle genres Cave and Yajilin.

I also authored contests outside LMI, most notably the Indian round of the WPF Sudoku Grand Prix 2014 which had a nice little ‘7’ based theme through the entire round which I was particularly happy with.

There are some other places which featured my puzzles in 2014 too, but other than my continued contribution to Akil Oyunlari magazines they are local ones like the ICT Evolve magazine (Pg 36) where it is likely to become a regular section, or college contests like the Saarang Sudoku Championship.

Apart from this, I’ve also participated in many competitions this year, so I’ll list the notable ones.

World Sudoku Grand Prix – 18th. Started strong, had a horrible few rounds in between, and was pretty much out of the reckoning for top 10 from Round 4.

World Puzzle Grand Prix – 17th. Started horribly, and it is really surprising that I finished at a better ranking than I did in the Sudoku GP, considering that the individual rankings read much better for the Sudoku GP.

Times Sudoku Championship – 1st. This was just my day, and I probably won’t have such a dominant day for a long time (even though I hope I do!). I won all of the four rounds against two great solvers in Rohan Rao and Rishi Puri. That’s… not usual.

World Sudoku Championship – 21st. I really really really need to stop my streak of horrible math rounds. It continued here, and Day 2 wasn’t long enough to mount a comeback like last year.

World Puzzle Championship – 23rd. At the start of the WPC, Rohan (team captain and all) told me that he gives me 23 choices to top last year’s rank of 24th, and I’d better get one of them. It is so typical that I chose the 23rd choice. Should’ve been more restrictive, Rohan. Either way, this is still a new record for an Indian at a WPC.

The World Championships’ results can be found here. One notable statistic here which I didn’t mention above is India’s team rank in the WSC. We finished at 6th, which is India’s best performance at a WSC. So, yay us. Also, yay French team for making a mistake and helping us make history.

So what else is new?

Puzzle Toketa: The Japan team, in collaboration with Serkan Y√ľrekli, have been selling volumes 1 and 2 of this book at the last two WPCs (2013 & 2014). I’ve purchased it both times, and highly recommend it to puzzlers looking for a varied list of puzzle styles, both old and new, with varying ranges of difficulty.

Meraklisina Akil Oyunlari: The Turkish Puzzlers have started an online content circulation page with patron pledges. Unfortunately, I’m looking at saving up some money right now, so I haven’t been able to enjoy these puzzles, but considering the authors involved, and knowing Akil Oyunlari’s general quality, I’d recommend subscription.

So come 2015, I’m hoping to be a bit more active here. Doing what, I’m not sure. It is clear above that there are other avenues for which I need to contribute puzzles. But I’ll think of something, hopefully. One thing I’ll definitely make an effort with: being more active in the Daily League. I’ve definitely fallen behind on that front.

Other than that, there are already plans lined up for 2015. some projects with GM Puzzles, LMI, the WPF. You can already see a Sudoku Mahabharat Round scheduled for Jan where I’m the author, and I’ll also be involved in the Indian Sudoku GP 2015. Here’s to a great 2015.

Happy New Year everybody!

Puzzle No. 503 – Diagonal Sudoku [Daily League]

I’m hoping for a bit of free time at the end of the year, I might put up a detailed post about… stuff, then. For now, Sudoku! This might be hard but don’t take my word for it.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Rules –¬†Follow regular Sudoku rules. Additionally, each marked diagonal must also contain all digits from 1~9.

P503 - Diagonal Sudoku

P503 – Diagonal Sudoku

Puzzle No. 501 & 502 – Killer Sudoku & Extra Region Sudoku [Daily League]

Now that I’ve posted my 500th puzzle, I am sharing the Sudoku I contributed to the Daily League last Saturday, along with the Sudoku I’m contributing for it today. I didn’t post the Killer last week on my blog because I wanted the space saved for the special puzzle.

Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.

Common Rules –¬†Follow regular Sudoku rules.

For Killer¬†The number in the top-left corner of a dotted cage is equal to the sum of this cage’s digits. No digit can repeat within a cage.

For Extra Regions – Each group of nine grey cells must also contain the digits 1 to 9.



P501 – Killer Sudoku


P502 – Extra Region Sudoku

Puzzle No. 500 – 9 Shady Masterminds [Special] [Marathon]

I thought quite a bit about what I wanted for my 500th puzzle here. There was a stage when I thought I’d just ignore the milestone and post something normal. Then I got a bit of an idea of a simple theme which might still give out a nice solve path with different logical deductions combining.

The puzzle that resulted from this idea is pretty narrow and quite difficult, according to my and Swaroop‘s test solving experiences. Still, I think its ended up being quite varied in the thinking required and I like how it turned out.

Unlike my usual approach of posting a single image, for this puzzle I am attaching a PDF instead. This PDF has 4 pages. The first page contains the puzzle. The 2nd and 3rd pages contain the rules (The length is just because there are 9 different puzzles to cover, but most of them are familiar and should just be a quick read-through). There are two newer puzzle types, and one variant which I couldn’t immediately find an example for, so I have added 6×6 examples for these three rule-sets. The remaining are all classics, so I’ve just linked to the respective page where I got the rules from, and you can visit these links if you want an example. If you are new here and haven’t seen those sites before, I suggest visiting them anyway for more great puzzles.

Here’s the PDF:

9 Shady Masterminds

Please let me know in the comments or by mail (prasanna16391@gmail.com) if you have any queries regarding the rules or any other issues.