# Puzzle No. 488 – Fillomino [Instructive]

Check this post for reference on this blog’s 3 main types of posts from now on.

The instructive post-type is (for now) mainly a way to “rehearse” my way of explanation for a certain target audience, while also giving the general puzzle solvers an easy puzzle to solve. I will not cover any complex techniques here, because the end result I’m looking at is designing a curriculum with more detailed explanations. I will mostly just hint at the starting point and a basic technique that’s necessary to solve the puzzle in question.

The instructive PDF’s definitely just for complete newcomers to the puzzle type, so I’m posting the puzzle image below the PDF anyway, so the experienced solvers can solve it directly.

Enjoy!

P488

# Puzzle No. 478 : Christmas Loop

Just about got a crazy idea in time to execute it on Christmas day. Thanks to Chaotic Iak and Tiit Vunk for testing this one. The puzzle itself is pretty difficult. The rules are complex. So, Merry Christmas everyone! *evil laugh*

Oh and thanks to Tawan for hosting the wonderful contest Colour Restore, which I won, because I’m the KING of Rock-Paper-Scissors B-) Actually, that’s where the entire inspiration for this idea started, the colours, which is mainly why I wanted the colours to be able to help in the solve in some way. So thanks for that too.

Rules –

Part 1 – Cipher Fillomino – Using Fillomino rules, divide the grid into regions. The numbers are all replaced by colours. Same numbers are represented by the same colour, and different numbers by a different colour.

Part 2 – Regional Railroads – Draw a loop that passes through every cell of the grid and doesn’t overlap itself. It can cross only on cells with a + sign and has to cross on every cell with a + sign. Each region in the grid must have at least one continuous instance of the loop passing through all it’s cells.

Part 3 (Not necessary for the puzzle to be unique. You can skip ahead to the puzzle with the rules above without this helper) Colour Combinations – The 3 common ways that colours mix to form other colours ((Red, Blue, Purple)(Blue, Yellow, Green)(Red, Yellow, Orange)) will form 3 groups where the colour values can make the arithmetic equation A+B=C valid somehow. (e.g. Red +Purple = Blue)

Rated – Hard of course.

If you want an easier version than even the part 3 helper, here’s an image with the equations between colours directly given.

P478

# Puzzle No. 472, 473 : Shakashaka, Fillomino

Heh. Will get back to Tuesday-Thursday-Sunday from the coming week. Also, my Puzzle posts will be Tuesday and Sunday now, and the Daily League post will be on Thursday. This is to accommodate Richard Stolk on Tuesdays.

Anyway,

Rules –

P473 – Rules for Fillomino.

Enjoy!

P472

P473

# Puzzle No. 436, 437 : Fillomino, Tapa

As promised, here’s 2 puzzles to make up for missing out on Sunday. The Fillomino’s just something I made to explore the middle pattern. The Tapa is one of those that was meant for elsewhere, but the theme was pretty nice so I decided to move it here. Its got my favorite (symmetric clues have same sums) theme, while all symmetric clues are still different. Its also got a decent un-clued space in the middle.

P436 –

Rules for Fillomino.

Rated – Medium (easy side).

P437 –

Rules for Tapa.

Rated – Easy.

Enjoy!

P436

P437

# Puzzle No. 402-405 : Fillominos!

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

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….

Enjoy!

P402

P403

P404

P405

# Puzzle No. 400 : Fillomino [No Rectangles] [Big]

Rules – Follow regular Fillomino rules. Additionally, none of the polyominoes can form a rectangle.

Solution to this puzzle can be found here. Password – NRFillo.

Wait, why am I posting 400 before I find 399? I thought I said I’d find 399! And why am I linking to the solution to this puzzle? What’s wrong with me?!

Heh. Whatever. Enjoy! Once you solve this, be sure to check the solution. You know… for tallying purposes.

P400

# 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.

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

P383

P384

P385

P386

P387

P388

P389

P390

P391

P392

P393

P394

P395

P396

# 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!

P351

P352

P353

P354

P355

P356

P357

P358

P359

P360

P361

P362

P363

P364

P365

P366

# 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

P317  : Akari.

P317

P318 : Corral.

P318

P319

P320, 321 : Fillomino.

P320

P321

P322 : Heyawacky.

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

P324, 325 : LITS

P324

P325

P326 : Masyu

P326

P327 : Pentasight

P327

P328 : Pentopia

P328

P329, 330 : The Persistence of Memory

P329

P330

P331 : Regional Yajilin

P331

P332, 333 : Tapa

P332

P333

P334 : Tapa Skyscrapers

P334

P335 : Yajilin

P335

P336 : Yajisan Kazusan

P336

# Puzzle No. 291 : Fillomino

Firstly, LMI Beginners Contest February starts in about 3 and half hours from now, and will go on for a week as always. This time, the variants are provided by me. I still need work on my Classic-writing skills though, so the Classics is by Deb. So anyway, the variants are an Extra Region Sudoku, an XV Sudoku, an Irregular 7×7 and a Frame Sudoku.

Next, Daily League update –

Odd Toroidal Sudoku by Bastien on Wednesday.

Anti Knight Sudoku by Rishi on Thursday (Also a Valentine’s day special).

A bit late, but Week 4 PDF.

I realized pretty late that, “hey, I should make a Valentine’s day puzzle!”, and rushed through this Fillomino. I realize this is the first Classic Fillomino I’ve posted here, but its not the first I’ve created. This one’s easy for the most part with some slightly tricky finishes. I’ve drawn a heart  for 2 consecutive years now. Next year I’ll try Cupid.

Rules for Fillomino.

Enjoy!

P291