A particularly devilish Yajilin puzzle. At least I think so.
Puzzle 14: Yajilin
Note how it has 5 ones and 5 twos? If you change R9C6 into 1 down instead, you’d also get 5 vertical arrows and 5 horizontal arrows. Sadly I’m aiming for difficulty, not really aesthetics, so that.
Tetromino Slitherlink. Follow usual rules of Slitherlink. In addition, the gray squares can be partitioned into tetrominoes such that in each tetromino, each number from 0-3 appears. Pretty hard because it’s first time. Well it’s first time; I can’t estimate its difficulty properly.
Puzzle 13: Tetromino Slitherlink
Yay. Okay the tetrominoes are obvious, but putting the numbers aren’t that obvious.
I can obviously imagine a version where the tetrominoes can be ambiguous. As long as the numbers (and hence the loop) are fixed, it doesn’t matter how the tetrominoes are divided. Or otherwise, without given numbers. The latter would be way more difficult actually, because I couldn’t think of an opening without a number. Time to ask someone good at making difficult puzzles.
Hidato. Fill in a number in each white cell such that for any two consecutive numbers, they are orthogonally or diagonally adjacent. Probably a little harder than usual; numbers 1-80.
Puzzle 12: Hidato
Yay Hidato. Tried a new design trick here; see if you can find it. See that 1 and 80 are adjacent? We have a loop!
Yajilin. Shade in black cells and make a loop visiting all remaining white cells (not including clue cells). Black cells may not be orthogonally adjacent; each clue cell points at the number of black cells in the direction of the arrow, passing over other clue cells. Should be some kind of easy.
Puzzle 11: Yajilin
First, I attempted to make exactly identical clues symmetrically (see R1C4 and R10C7, R4C7 and R7C4). But then I got stuck because it’s just impossible to put a 3-clue, putting a 0-clue kinda gives stuffs for long lines, and I just got bored. Hence the given result. Yes, symmetrical givens because it’s quite easy making that in Yajilin.
To keep you entertained, there will be two more puzzles, each appearing in 12 hours after the latest one. If I manage to construct another before all puzzles are released, then there will be more this weekend.
Slitherlink; common logic puzzle I’d say. Google for rules. 17×17, easy-to-medium.
Puzzle 10: Slitherlink (click to enlarge)
UPDATE (7-Aug-2012, 19:38 UTC+7): Fixed an ambiguity around the G.
Okay, so you’re reminded that it’s the beginning of a new week. At least for me. Notice the symmetry?
That was extremely hard to think of. I started by listing all letters where it can form another letter when turned 180 degrees; I got like 7 pairs, including “A” paired with “U/V” (the middle two letters), and also 7 single letters. Then after some failed tries (like, trying SWAP with its reverse being JUMS…wut?), I noticed the word NOW which can be turned to MON. I tried to think of a Monday date that is also rotationally symmetric, and as you see, 6 August is symmetric. Quite. It’s pretty rare to see U with a line, but whatever.
However, before getting the idea of making a “today’s date”, I started with planning that every 10 puzzles (puzzles with puzzle number ending with 0), I will make a large puzzle (at least 289 cells). That’s also why I tried my best to construct two puzzles (Puzzle 8-9), as I haven’t stocked enough to publish this one. I’m also planning to make an extra large puzzle (at least 1395 cells (31×45) or something extremely fancy to overcome the restriction) every 50 puzzles or 100 puzzles, but it seems like I’m having a long way to go…
Hm I start to forget stuffs in IMO. Better get these out before I forget it entirely.
In short, I did extremely poorly in it, at least for my target of getting 21 points or silver whichever is higher. Stuffs aside, I’m having moar fun in the recreation hall, especially after Day 2’s contest where the stuffs of recreation hall becomes available.
Five Cells. Mark walls along the gridlines to divide the grid into pentominoes such that each number tells exactly how many walls are among the four sides of the cell containing the number. 10×10. Easy-ish or something.
Puzzle 9: Five Cells
This puzzle has symmetry, unusual for Five Cells. Mostly toying around with one trick used at least twice that I remember, plus another trick used also at least twice. Yay. Puzzle 10 is ready, but it will be posted when it strikes 00.00 on 6 August (Monday) my time, for a reason you’ll see…
Update (4-Aug-2012 20:32 UTC+7): Fixed a multiple solution issue.
Surveyors Heyawake, 10×10. Should be rather easy.
Puzzle 8: Surveyors Heyawake
Hm things seem pretty easy. That’s what happened when I tried making a “normal” Heyawake with absolutely no symmetry. The 6×6 room is pretty fun to toy with though; think of it as a Minesweeper. Oops spoiler; but you don’t think that 11 is going to be a Minesweeper clue don’t you -_-
Hm, Surveyors Heyawake and Smullyanic Dynasty can make some great hybrid, due to both having Minesweeper clue-style. I’ll see how I can toy with it…but I need to try making a Smullyanic Dynasty first.
Originally I wanted to make another IMO post, but I’ll start with this first because of the…uh…weirdness I find. Also linking to verbose blog title for random reasons, most likely because this post also contains heavy random statistics.
1. There are two comments filtered to my spam comment. One I decided to approve, and the other one I decided to delete. I mention this because I’m unable to determine whether they are spam comments or not. The one deleted said “I can not figure out how do I subscribe to your weblog”. I’m not sure whether WordPress allowed non-WordPress users to follow another blog without signing up (enter e-mail address) without the blog’s owner needing to put the follow widget, so there you go.
2. Top searches in the past 7 days:
imo 2012 problem 6: Here you go. I didn’t solve it, but now I get the solution with that cursed +12 induction.
betaveros imo taiwan: This is his blog; ask him if you have any questions about him.
imo geometry blog: Ask betaveros above. I’m a combinatorics person, and train my geometry like 1% of my math time. I think he trained his geometry way more than me.
angle chasing imo problems: Try to see Problems 1 or 4 in past IMOs. I distinctly remember IMO 2006 P1 and IMO 2012 P1; I don’t remember any else solvable with only angle chasing (plus concyclicity and simple stuffs like that).
solutions of imo argendina 2012: Why it’s spelled “argendina” -_- See here.
indonesian position in imo 2012 in mar del plata , argentina: 35th position, getting a total of 100 points and claiming 1 silver, 3 bronze, 1 HM.
in mario and sonic in the olympics winter games how do you get the speedster emblems: O.o Uh the best advice is to stock up Mushrooms, then in some steep hill you should jump and use five at once to boost your speed to 250+ kph and maintaining it because you don’t touch the ground.
3. Top five posts/pages in the past 7 days:
Home page / Archive: Obvious
IMO 2012 Post 1: Probably because I’m listing as a series, so people start by the first of the series.
IMO 2012 Post 3: Probably because it’s on the main page, explaining why it gets more traffic than Post 2.
Puzzle 7: Yay Number In Order gets quite some traffic. Why it gets more than Puzzle 6…perhaps because it’s more on the top of the main page than Puzzle 6?
IMO 2012 Post 2: Hm pretty obvious if people are reading my series.
Done with statistics and stuffs, time to make IMO 2012 Post 4.
Hm for an absolutely unrelated opening text: I find out the following comment from someone, filtered in my Spam. I have a hard time deciding whether it’s spam or not -_-
“I went over this internet site and I conceive you have a lot of great info, saved to my bookmarks (:.”
IMO 2012, Post 3. In short, I find the recreation hall. Stuffs basically don’t deviate far from that thing.
Chaos at the Sky 