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.

Enjoy!

Killer

P501 – Killer Sudoku

P502

P502 – Extra Region Sudoku

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Puzzle No. 491 : Killer Sudoku [Daily League]

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 certain whether this is too late to be put up today).

I’m sorry dearest readers, I think I’ll have to skip an explanation of why I’m inactive on my blog right now for later. There’s just too many plans right now, that all seem to end around May, and if it all goes as planned, you’ll see at least some of the reasons why I’ve been too busy to post here.

Anyway, here’s a Killer Sudoku that was used for the Polish Sudoku Championship qualifiers. These qualifiers were open to International solvers online, so I think many solvers would have seen this already. I still think it’s nice enough to put it up for those of you who haven’t.

Rules – Follow Classic Sudoku rules.
Additionally, the value on the top-left corner of a dotted cage is equal to the sum of the digits in the cage. No digit can repeat within a cage.Enjoy!

P491

P491

Puzzle No. 397 : Thermo-Killer Sudoku [Daily League]

First, PDFs!

Week 18.

Week 19.

Today’s Sudoku combines the increasing numbers logic of a Thermo Sudoku with the addition logic of a Killer Sudoku. It isn’t that difficult but you still need to get used to working with both together. I could perhaps have put a thermometer figure with a sum on the corner, but chose this layout for 2 reasons – Its easier to draw the image this way, and the fact that it enables having just normal Killer cages too.

Rules – Follow regular Sudoku rules. Additionally, the number at the top left of a cage gives the sum of the numbers within the cage. Numbers cannot repeat within a cage. Also, in cages with a shaded cell, the numbers increase from the shaded cell to the ends of the cage.

Enjoy!

P397

P397

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.

P317

P317

 

 

 

 

 

 

 

P318 : Corral.

P318

P318

 

 

 

 

 

 

 

P319 : Country Road.

P319

P319

 

 

 

 

 

 

 

P320, 321 : Fillomino.

P320

P320

P321

P321

 

 

 

 

 

 

 

P322 : Heyawacky.

P322

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.

P323

P323

 

 

 

 

 

 

 

P324, 325 : LITS

P324

P324

P325

P325

 

 

 

 

 

 

 

P326 : Masyu

P326

P326

 

 

 

 

 

 

 

P327 : Pentasight

P327

P327

 

 

 

 

 

 

 

P328 : Pentopia

P328

P328

 

 

 

 

 

 

 

P329, 330 : The Persistence of Memory

P330

P329

P329

P330

 

 

 

 

 

 

 

P331 : Regional Yajilin

P331

P331

 

 

 

 

 

 

 

P332, 333 : Tapa

P332

P332

P333

P333

 

 

 

 

 

 

 

P334 : Tapa Skyscrapers

P334

P334

 

 

 

 

 

 

 

P335 : Yajilin

P335

P335

 

 

 

 

 

 

 

P336 : Yajisan Kazusan

P336

P336

Puzzle No. 258 : Killer Sudoku

A few friends knew this was coming in 2013. They just didn’t know which variant would come first. 😛 Anyway, here’s my first Sudoku. I decided that its best to go with the “obvious” and start with my favorite variant.

This Killer has a bit of a tricky opening, and maybe a few thinking moments along the way.

Rules – Follow Classic Sudoku rules.
Additionally, the value on the top-left corner of a dotted cage is equal to the sum of the digits in the cage. No digit can repeat within a cage.

Rated – Hard, I’ve been told 😛

Enjoy!

P258

P258