Puzzle No. 342 : Regional Yajilin

Daily League Week 9 PDF and Week 10 PDF.

If you haven’t yet attempted Beginners’ Sudoku contest March edition on LMI, what’re you waiting for?!

Also, I have another hectic month ahead of me. Apart from the usual Puzzle related commitments (which will all get posted here in their respective times), I also have my final year of Post Grad exams through this month. There’s also a Sudoku GP towards the end of April. So, I’ll post here when I can, but don’t expect much in terms of quality and variety. I’ll make it up come May when I’ll be “College-free”.

Anyways, here’s a random Regional Yajilin. I’d say its not too tricky.

Enjoy!

P342

P342

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Puzzle No. 340 : Shakashaka

Firstly, if you haven’t yet, I’d highly recommend solving the wonderful Sudoku set authored by Richard Stolk on LMI, V2V (Variations to Variants), still open for participation over the weekend + Monday as usual.

I have a sudden new found obsession for solving and creating Shakashaka puzzles. I’m not sure how or why it started, but it has. So, I wrote 3 Shakashaka puzzles. Out of those, I decided to keep 2 in reserve for future, as I’m trying to do that a bit these days as it’ll help when there’s a bunch of competitions at once. This is the one I thought would least suit any form of competitive solving, and so this is the one that got the cut. I’m sure that while solving this one the reason for that will be obvious, and it is not related to quality.

As for difficulty, I’d say its on the easy side, but prepare for some tricky moments too as I’m horrible at determining difficulty of genres that I’ve just begun creating.

Anyway,

Rules for Shakashaka.

Enjoy!

P341

P340

Puzzle No. 339 : Norinori

Daily League’s Week 9 PDF. I’ll share just the pdf links for now, till I get back to the usual frequency of posting.

The below puzzle’s pretty easy and random. Used a pattern a little bit in a newspaper puzzle and just wanted to use that pattern extensively, for no particular reason except that for the fact that its been some time since I just made a random puzzle post thats not meant for anywhere.

Rules –  Shade in some cells such that every region contains exactly two shaded cells, and every shaded cell shares an edge with exactly one other shaded cell.

Enjoy!

P339

P339

Puzzle No. 338 : Weighted Killer [Daily League]

I’ve fallen into an annoying illness over the past week, so I’ve just taken a week off from most places, including posting here. I’ll hopefully resume from now, but with a lesser frequency till I become completely fine. Here’s a Weighted Killer for the daily league. I’m now aware of a little difference when I approach Sum/math related Sudoku types. The little difference is I always finish them off quickly, and then they turn out harder than expected. This is spread across other genres too, but in this particular category it seems much more pronounced.

Anyway, this one has a few tricky deductions midway but otherwise its not what I would call hard (although the rules of the type in themselves dictate a hard path at most times).

Rules – Follow regular Sudoku rules. The number given at the top left of each cage is the sum of all digits in white cells plus double of the sum of all digits in gray cells inside that cage. No digit is repeated inside a cage.

Enjoy!

P338

P338

Puzzle No. 337 : Galloping Horses Sudoku [Daily League]

Daily League update –

A date with 8 on Detuned Radio on Friday.

Ten Box Sudoku by Bram on Saturday.

Odd Sudoku by Kwaka on Sunday.

Diagonally Nonconsecutive Sudoku by Fred on Monday.

Week 8 PDF.

My Contribution for today is below. Its a Knight-step related variant where the rules might be difficult to grasp without looking at the illustrative picture.  Much thanks to Vladimir Portugalov (also for test solving), Fred Stalder and Karel Tesař for inputs about making the rules more understandable. Once the rules are understood I don’t think the puzzle is especially difficult.

Rules : Follow Regular Sudoku rules. Additionally, a digit in a shaded cell must repeat in all cells of any one line of Knight steps including the cell itself. The line of knight steps goes on until its stopped by the grid boundaries. The shaded cell can be at any position on this line.

E.g. The picture below shows what this means, without considering the Sudoku part of the rules. Basically, because the 9 is shaded, it means any one of those colors must all contain 9 (Either all red=9 or all blue=9 or all yellow=9 or all green=9).  Thats what “line of knight steps” means in this case.

Enjoy!

Eg

Example

Galloping Horses

P337

Puzzle No. 316 – 336 : Polish Championship set

I’d mentioned a few posts earlier, that I’d contributed some puzzles to the Polish Championships this year. There was an offline qualifier, an online qualifier, the finals, and the playoffs. I think there was a good share of my puzzles in all 4 of these rounds. Its pretty confusing which was used where, since I’ve not organized it that well in my folders, so I’ll just post all the themed ones together (as mentioned in that post linked to above, the online qualifier had puzzles that I used simultaneously elsewhere and were more of a hurried solution).

The theme I was working on should be pretty obvious on seeing all the puzzles. It started with the easier Tapa, which I made completely by accident while writing a bunch of newspaper puzzles, and then I just tried a similar thing with the Corral and that happened quickly too. So, just decided to go along with it, discarded those two from the newspaper bunch and started off the Polish set with them. I couldn’t really try and retry the puzzles to get the exact appearances I wanted, and this is apparent from the 2 LITS and the Killer Sudoku among other ones. The LITS is of course something difficult that I set myself to do in a pretty short timespace, as both LITS were required hurriedly for the qualifiers, and to make it have duplicated regions throughout on the first try seems almost impossible, at least for me.

Anyway, here they are. As with the Zeka set, rules are either linked to by the puzzle names or just added here. These puzzles have varying difficulties, but I don’t think anything was exceptionally hard.

Enjoy!

P316 – ABC Box – Fill the grid with letters A, B and C. The clues outside give the sequence of letters in that row or column. If the clue is a number, that is the number of times a letter appears in that position of the sequence (Which letter is determined while solving). If the clue is a letter then that letter appears in that position of the sequence (The number of times it appears continuously is determined while solving). A “?” means that an unknown letter is appearing an unknown number of times in that position of the sequence.

P316

P316

 

 

 

 

 

 

 

 

P317  : Akari.

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P318 : Corral.

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P318

 

 

 

 

 

 

 

P319 : Country Road.

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P319

 

 

 

 

 

 

 

P320, 321 : Fillomino.

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P320

P321

P321

 

 

 

 

 

 

 

P322 : Heyawacky.

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P322

 

 

 

 

 

 

 

P323 : Killer Sudoku 8×8 – Follow regular sudoku rules. Additionally, the numbers at the top left of a cage gives the sum of numbers in that cage. Numbers cannot repeat in a cage.

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P323

 

 

 

 

 

 

 

P324, 325 : LITS

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P324

P325

P325

 

 

 

 

 

 

 

P326 : Masyu

P326

P326

 

 

 

 

 

 

 

P327 : Pentasight

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P328 : Pentopia

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P328

 

 

 

 

 

 

 

P329, 330 : The Persistence of Memory

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P331 : Regional Yajilin

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P331

 

 

 

 

 

 

 

P332, 333 : Tapa

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P332

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P333

 

 

 

 

 

 

 

P334 : Tapa Skyscrapers

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P335 : Yajilin

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P335

 

 

 

 

 

 

 

P336 : Yajisan Kazusan

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P336

Puzzle No. 315 : Creeky LITS?

Daily League Update –

A Renban Groups Sudoku with a slightly different perspective by Bastien on Wednesday.

An odd-even Chessdoku by Rishi on Thursday.

About today’s puzzle, its one of those cases where I’m thinking “Oh I wanna do this today, no, I wanna do that today, well I’ll just do both”. I’ve wanted to do a regionless LITS variant for a while now but haven’t been particularly happy with any of the choices I came up with. I’ve also wanted to do a Creek puzzle for a while because I really like these from what I’ve solved of them. Joining both together makes for a lot of rules, which, apart from the top right area, is the trickiest aspect of this puzzle so be sure to keep all of them in mind while solving 😉

Rules for Creek. Additionally, the white area has the following constraints –

1. A 2×2 area of cells cannot all be white.

2. The white area must all be tiled with tetrominos of different shapes and as in a LITS puzzle, same shapes cannot touch each other orthogonally.

Enjoy!

P315

P315

Puzzle No. 314 : Search 9 Sudoku [Daily League]

Daily League update :

Greater than Killer on Wednesday by Bastien.

Anti Knight Nonconsecutive on Thursday by Rishi.

Classic on Friday by Tom.

Quad Second on Saturday by Bram.

Magic Summer on Sunday by Kwaka.

Arrow by Fred yesterday.

And mine today below.

Also, week 7 PDF. Also, there were 2 fixes in last week’s pdf that I shared before the Zeka set post, so I’ve updated the link there.  (Particularly, the fixes were on the Odd Toroidal and the V-Day Sudokus).

Also, the daily league sudokus can now be solved on an online interface on the Sudokucup site one day later than they’re shared on our respective blogs. Thanks to Karel Tesař for setting this up. Its helped me out as well, as I’ve been particularly busy in the last few days.

Today’s sudoku is Search 9. The rules of this are the same version as the one contributed by Richard Stolk to the 3rd WPF Sudoku Grand Prix. I’m not extremely certain of its difficulty, but its certainly not easy.

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.

Enjoy!

Search9

Puzzle No. 313 : Knapp Daneben Tapa (Birthday Special)

Puzzle Marathon has now begun, and the Daily League Sudokus will now be available to solve on an online interface on Sudokucup. But, today’s not about all that 😉 Today’s about me being depressed that I’ve become one year older. And for that, here is a huge puzzle. Its the season for those after all, right?

Rules for Tapa. Additionally, all given clue numbers are either one more of one less than they should be. Therefore a 1 can mean a zero.

I have also put this into a PDF form, for those of you who find that more convenient.

Enjoy!

P313 PDF

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