Puzzle No. 402-405 : Fillominos!

Update : Slight issues in Puzzle 403 and 404 fixed. Apologies.

Firstly, links!

This coming weekend, the 7th round of the 2013 WPF Sudoku Grand Prix, the Turkish Round, takes place on the Logic Masters India site. The weekend after that, the 8th round immediately follows. This is the Italian Round and it will also take place on the Logic Masters India site. The weekend after that, on July 7th to be exact, the Indian Puzzle Championship takes place, on, you guessed it, the Logic Masters India site.

On a more personal note now (And also concerning people in Chennai), my regular readers might remember about my and Rohan’s contribution to an event in Delhi recently. The same organizers, SportzConsult, are now organizing a similar event in Chennai, the Chennai Brain Games, in August. Just like last time, me and Rohan will be contributing, specifically for the Mental Math, Sudoku and Puzzle events. The Instruction booklets are already out essentially, and can be found on that link.

Now, to Fillominos! I went a little crazy with the genre trying to make a simple one without much implied-logic for the newspaper publishers, and miserably failing at that. In the end, I did manage to get one with the intended difficulty out, but I met these 4 along the way and they didn’t know where to go, so I told them about this place. Yeah, I talk to Fillominos now. Aannyywayyyy….

Fillomino Rules.

Enjoy!

P402

P402

P403

P403

P404

P404

P405P405

Puzzle No. 382-396 : Czech Puzzle Championship Puzzles

I think this was a set I wrote when I wasn’t that well. That’s not meant as an excuse, but as a warning – I tend to make things harder when I’m ill. However, some of these are also rejects from newspaper bunches for being not-too-easy (Heyawake for example) which means there’s some easy in there too. Unlike my previous puzzle set posts, I decided to find out a bit more this time, which basically means that I can add the points that were assigned to each puzzle. The Skyscrapers Pentomino was not used, but since it was not used for being too hard, I’ve simply valued it at points higher than any of the others.

The Championship had 5 rounds and then a playoff at the end. The first round had the largest time slot and so two of the hardest puzzles of my set, the Yajisan Kazusan and the Shakashaka were moved into that round. Two others, Heyawake and Multiplicative Corral were moved to the Playoff/Final. There’s no point valuing for these, but I’d put their difficulty around the LITS or the Country Road, something of a medium difficulty.

There were 25 participants, and Jan Novotný emerged as the winner, mainly by having a good playoff, as Matej Uher was ahead after the first 5 rounds (377.8 – 299.2). In fact, Jan was 4th before the playoffs, behind Jana Vodičková (332.5) and Jakub Hrazdira (306). Congrats to him, and the other qualifiers. For my round (the 4th round, valued at 110 points), the top scorers were Matej Uher (85), Jakub Ondroušek (77) and Jakub Hrazdira (62). I’m posting only my own puzzles but as a test solver for the event in general, I did have access to the other puzzles too, and the quality is quite high throughout. If you’re interested in knowing more, or you are a Czech/Slovakian interested in becoming a member of the HALAS Association (where I think you will gain access to all these puzzles), I’d suggest you contact Jiří Hrdina, who co-ordinated/organized this Championship.

Rules/links and points –

P382 : Bosnian Road (8 points).

P383 : Country Road (12 points).

P384 : Easy As Tapa (14 points) – Follow regular Tapa rules. Clues outside must be placed in the first unshaded cell in that row or column.

P385 : Fillomino (7 points).

P386 : Heyawake (Playoff puzzle).

P387 : LITS (12 points).

P388 : Masyu [Alternative] (4 points) – Follow regular Masyu rules. Additionally, the loop cannot pass two circles of the same colour continuously.

P389 : Multiplicative Corral (Playoff Puzzle) – Draw a single closed loop along the grid lines that contains all the numbered squares and does not touch itself, not even at a point. Each given number is the product of two numbers: the number of interior squares that are directly in line vertically with that number’s square (including the square itself) times the number of interior squares that are directly in line horizontally with that number’s square (again, including that square itself).

P390 : Nanro (14 points).

P391 : Norinori (5 points).

P392 : Product Heyawacky (25 points). Follow regular Heyawacky rules. Additionally, the number at the top left of a cage is the product of shaded cells in each different region, only pertaining to its area within the cage.

P393 : Shakashaka (40 points).

P394 : Skyscraper Pentomino (60 points?). (Edit – It should be noted that the puzzle in the link has “X” marks where pentominos can’t be placed, whereas the puzzle below has black cells denoting that)

P395 : Sum Skyscraper (9 points). Follow regular Skyscrapers rules. This skyscraper uses the digits 1~7. The numbers outside indicate the sum of the visible digits.

P396 : Yajisan Kazusan (40 points).

Now, the puzzles! Enjoy!

P382

P382

P383

P383

P384

P384

P385

P385

P386

P386

P387

P387

P388

P388

P389

P389

P390

P390

P391

P391

P392

P392

P393

P393

P394

P394

P395

P395

P396

P396

Puzzle No. 379 : Tapa

I really love using the 1-3 clue for Tapa. I’ve contributed a different 1-3 based puzzle elsewhere, and my birthday special was as good as a variation on including the clues 1-1, 1-3, 3-3. Here’s another much easier all 1-3 based puzzle. I made it for the local newspaper but thought the ending might be a bit much for beginners, so decided to post it here.

Rules for Tapa.

Enjoy!

P379

P379

By Prasanna Seshadri Posted in Easy, Tapa

Puzzle No. 376 : All Even or All Odd Sudoku [Daily League]

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Its been a mad, fun, exhausting 2 days. One evening with Manchester United Fan Club Mumbai at a screening of Sir Alex’s last home game in charge and also the trophy presentation. Full of mixed emotions but we made the most of enjoying the occasion. A day later, I was at the Wankhede stadium within shouting distance of the Hyderabad entrance, watching Pollard go on that six hitting spree in the IPL.

Anyway, back to today. You can download the league’s Week 16 PDF and Week 17 PDF.

Today’s Sudoku is pretty easy considering the things that can be done with this variant, but may still be a little challenging for first timers.

Rules – Follow regular Sudoku Rules. Additionally, in each 3×3 box, the shaded cells must be of the same parity, i.e., either they must all contain even digits or they must all contain odd digits.

Enjoy!

P376

P376

Puzzle No. 374 : Odd Sudoku with Descriptive Pairs [Daily League]

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Week 15 PDF. 

Compared to how difficult Descriptive Pairs can usually get, I think the Odd part tames this combination a lot and puts it on the easy side. I still like how it turned out, especially with the clue pairs working out with a “same sum” theme that I was trying.

Rules – Follow regular Sudoku rules. Also, all shaded cells must contain odd digits. Additionally, for every pair of outside clues X and Y, at least one of these cases is true :

1) X is in the Yth position in that direction.

2) Y is in the Xth position in that direction.

Enjoy!

P374

P374

Puzzle No. 371 : Kropki Sudoku [Daily League]

Week 14 PDF.

If you’ve not heard yet, LMI has started Beginners’ Puzzle Contests after the success of Beginners’ Sudoku Contests, and the first one is a lovely Classic Masyu Contest!

As I said in my last post, I’ve been busy with the Delhi Brain Games event as well as my exams. My exams got over today, and DBG was held successfully on Sunday. So, I’m looking at a relatively not-so-busy schedule ahead (after today). I’ll try to get back to regular posting here again. There’s also gonna be some more puzzle sets I’ll be posting here on some later date. For now, I’m in a hurry to finish things today that have been pending because of my exams + DBG. So, here’s an easy Kropki for the daily league.

Rules – Follow regular Sudoku rules. Additionally, If the absolute difference between two digits in neighbouring cells equals 1, then they’re separated by a white dot. If the digit in a cell is half of the digit in a neighbouring cell, then they’re separated by a black dot.

Enjoy!

P371

P371

Puzzle No. 351 – 366 : Zagreb Open puzzles

I managed to somehow squeeze this set out in one day just before my exams started, right in the middle of the hectic submissions time in college. After that, Vladimir managed to squeeze in some time on that day itself to test these puzzles, so many thanks to him for that.

Rules all placed at the start of the post with the puzzles coming later (Trying a new format for posting, simply because its more convenient for me. The puzzle captions should aid you in knowing which rule is for what puzzle, but the ordering is the same as well, so it shouldn’t be much hassle either way.

Rules –

351 – Akari.

352 – Fillomino.

353 – Graffiti Snake.

354 – Heyawake.

355 – Japanese Sums – Place the digits 1-6 in some of the squares, so that no digit is repeated in any row or column. Sums on the outside indicate the sums of consecutive digits in that row or column, in order. Each sum is seperated by at least one empty square.

356 – LITS.

357 – Nanro – Write numbers in some cells of the diagram. All numbers in a region must be equal. The given number in a region denotes how many cells in this region contain a number (at least one). Same numbers must not be orthogonally adjacent across region boundaries. Numbered cells must not cover an area of size 2×2 or larger. All numbered cells must form a single orthogonally continuous area..

358 – Odd Even Skyscraper – In addition to Skyscraper rules linked to below, all outside clues that are shaded are odd. The rest are even. Range 1-6.

359 – Pentopia.

360 – Regional Yajilin.

361 – Shakashaka.

362 – Skyscrapers. Range 1-6.

363 – Tapa.

364 – Tents – Place a tent ortogonally next to each tree so that no two tents touch eachother, not even diagonally. Numbers on the outside indicate the amount of tents that are in that row or column.

365 – Walls Fillomino – Some region borders are given; i.e. the numbers on both sides must be different.

366 – Yajisan Kazusan.

Enjoy!

Akari

P351

Fillomino

P352

GraffitiSnake

P353

Heyawake

P354

Japanese Sums

P355

LITS1

P356

Nanro

P357

OddEvenSkyscrapers

P358

Pentopia

P359

RegionalYajilin

P360

Shakashaka1

P361

Skyscrapers

P362

Tapa

P363

Tents

P364

WallsFillo

P365

YK

P366

Puzzle No. 344 – 346 : UKPA Open Tournament puzzles

I’d sent many more puzzles for the UK tournament, but the rounds were put together in a bit of a rush, so a lot of them will be used in future contests, I’m told. Anyway, the 3 that were used, 2 Snake variants, and a LITS are what I’m posting now. Its been a while since the Puzzle Booklets were released on the UK forum so most of you have probably seen these. Still, for the few who haven’t…

On a side note, I’ve been working on a few puzzle sets recently too. While a few of these might/might not make it here, one set in particular will sometime in the next week I think. So, something to look forward to.

Also, try out April Contest by Riad on LMI. Its tough, but there aren’t any time constraints, so one can solve the puzzles at their own pace purely for enjoyment.

Anyway, to the puzzles.

No. 344 – Horse Snake – Blacken some cells so that they form a single continuous path, one cell width (the snake), which head and tail are given. The snake cannot touch itself, even at a point. A clue in a cell corresponds to the number of snake cells (head and tail included) which can be reached in a knight step from this cell. There cannot be any snake segment on a cell containing a clue.

P344

P344

 

 

 

 

 

 

 

No. 345 – Slitherlink Snake – Draw a 1 cell-wide snake of unknown length, not touching itself even diagonally. Its head and tail are marked with circles. The snake cannot go through numbered cells. Numbers show the amount of cells occupied by the snake in the four neighboring cells.

P345

P345

 

 

 

 

 

 

 

No. 346 – LITS – Colour a shape of 4 orthogonally connected squares in each black bordered region so that all coloured squares form a single contiguous area. This area can’t contain any 2×2 coloured squares. Two identical shapes in different regions can’t touch eachother by a side. Rotations and reflections are considered the same shape.

P346

P346

 

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