Comments on 2016-01-13's Tapa

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Prasanna16391 commented at 2016-01-13 00:17:04
Saw the logical way on the resolve but I don't really regret not waiting for it because its really narrow and obscure. A nice puzzle once you figure it out though.

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rob commented at 2016-01-13 00:49:37
Hmm, care to share a hint? I only saw the wrong way out of the bottom left fail when the puzzle became non-unique in the top left... (And then it does fail due to connectivity, but that's going quite far.) It's nice when the required case distinction is near the start, though, because then I can just "Clear Puzzle".

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Prasanna16391 commented at 2016-01-13 00:51:10
Its a lot of connectivity stuff, thinking that something can't come out from two separate places at the same time. The bottom 3-1-1 can also be proven to be straight or curved early on which helps.

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Prasanna16391 commented at 2016-01-13 00:53:40
Specifically, the top left part of the bottom 3-1-1 will have to be part of the "3" of it and the top right of it can either come out upwards through the middle or through the right, meaning the bottom has to come out from the right. Does require some forward thinking but not much if you spot the right patterns.

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kiwijam commented at 2016-01-13 06:24:03
I've done this a few times now, but still don't see much logic at the start. If you guess wrong then there's no immediate contradiction, and you can continue happily until connectivity fails later. But I suppose guessing is probably still faster than trying to find a logical track.

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kiwijam commented at 2016-01-13 06:29:24
PS I found the top-right corner a faster place to start guessing.

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john_reid commented at 2016-01-13 06:29:57
Yeah - it was just TOO hard.

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Para commented at 2016-01-13 09:32:19
That was confusing. My brain really kept excluding correct options. Surprised I'm still so far at the top.

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rajeshk commented at 2016-01-13 12:41:03
For any guess I made, contradiction came very late and I have to redo this puzzle many times. Very nice puzzle to get your brain ticking.

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anderson commented at 2016-01-13 21:15:35
I kept thinking I had a contradiction when guessing my way through it, and it turned out that my very first guess wasn't actually a contradiction but I thought it was. Oops! Is there a solution that doesn't involve thinking more than two steps forward at any point?

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rob commented at 2016-01-14 00:56:34
I'm somewhat closer to something reasonable now (trying out chess notation): A3,B4,A5 shaded, DE6 blank. Can't go through below E2 (else D3 can't escape). Wall between CD4 (else D2 can't escape). There's now two options for C3: B3B4C4 shaded, in which case D3 has to escape along DEF3, or D234 shadedin which case D1 must also be shaded (say for A3 to escape). So we also have two options for E2, and in both cases, F1 is a shaded 1.

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rob commented at 2016-01-14 01:03:08
... Now we see that F3 has to be part of G4's 3, and its group can either escape up along the center, or to the bottom right (but not both). So F3 has to escape along the right of I3. Now H4 must be blank, so G4 connects with G5's 3, hence G6 is blank. So our bottom right group needs to escape via I78 and EFG10. H8's 1 must now be H9, so we must shade H567, and finally we're ready to resolve the bottom left.

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Comments on 2016-01-14's Tapa

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Prasanna16391 commented at 2016-01-14 00:08:00
I was too slow to see the bottom left and how that stopped connectivity. Ah well. Nice puzzle.

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john_reid commented at 2016-01-14 07:51:31
Much nicer than yesterday's! [I could actually work this one out.] Great puzzle - I really like the theme of only 1 clues.

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Rohan Rao commented at 2016-01-14 16:06:26
This was really pleasant to solve after yesterday's 'colourful' one.

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rajeshk commented at 2016-01-14 19:59:58
Very nice theme

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swaroop2011 commented at 2016-01-15 00:33:57
Yes i also missed the bottom left flow. Did that at the end.

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Comments on 2016-01-15's Tapa

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Prasanna16391 commented at 2016-01-15 00:05:40
Haha, nice finish, this is a Tapa with Borders puzzle in a way :P

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swaroop2011 commented at 2016-01-15 00:33:23
ah i am going too slow now a days. dont know why.

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nilz commented at 2016-01-15 01:58:15
Hmm, I was really slow, but this was a really nice puzzle. Tried to use uniqueness to put a line across the top from one 3 to the other. Which obviously didn't go well...

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gareth commented at 2016-01-15 04:28:09
I love the false uniqueness-assumption temptations in this puzzle. :)

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Rohan Rao commented at 2016-01-15 15:26:14
Interesting puzzle to defy intuition :-)

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rajeshk commented at 2016-01-15 18:05:17
Uniqueness used at many places in this puzzle.

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swaroop2011 commented at 2016-01-15 23:03:06
No uniqueness rule requried. Logic flows through nicely.

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Comments on 2016-01-16's Tapa

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Prasanna16391 commented at 2016-01-16 00:05:20
I do like these "travelling around the sides" ones. I feel I was a bit slow spotting the right side deductions in general.

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Para commented at 2016-01-16 09:14:46
That was fun. 113 seems to be a really frequent clue to create openings with this CTC.

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wicktroll commented at 2016-01-16 18:39:39
I lost time because I thought loop is not allowed in a Tapa.

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Comments on 2016-01-17's Tapa

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prasanna16391 commented at 2016-01-17 00:04:33
Missed the break-in for a while. Really nice puzzle.

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swaroop2011 commented at 2016-01-17 01:32:59
I started of fast. But stuck in middle. Considering big size, i wanted to avoid mistakes. But Very nice puzzle. Have to increase my speed.

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kiwijam commented at 2016-01-17 04:27:32
Very nice.

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john_reid commented at 2016-01-17 08:10:19
Great fun!

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Para commented at 2016-01-17 08:29:13
A good work out.

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Grizix commented at 2016-01-17 20:00:31
I'm unable to find any break-in ...

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Grizix commented at 2016-01-17 20:15:56
Ok, found it, power of posting.

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Comments on 2016-01-18's Tapa

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rob commented at 2016-01-18 00:24:24
Quite a steep difficulty progression in this one, and I have to admit I didn't get all the logic initially.

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prasanna16391 commented at 2016-01-18 00:47:08
Ouch, I completely missed the connectivity issues for a while. Really cool puzzle.

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hinowbye commented at 2016-01-18 00:55:40
got stuck on the upper left corner, dunno why. :( cool puzzle but couldnt do it logically

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rajeshk commented at 2016-01-18 01:05:50
I have to guess many times in this puzzle to solve it completely.

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gareth commented at 2016-01-18 02:49:09
Far too hard for me - will give up playing if there are many more that take this long since I don't have time.

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john_reid commented at 2016-01-18 05:30:54
Yes, again, this was much too hard for me. I was ok with the top right and bottom left corners, but the diagonal from top left to bottom right was a complete mystery. I just ended up guessing and guessing and guessing which I hate to do. Maybe there was a way to use the 1-1-2 clue along with that pair of touching 1-4s to force that path in the top left? Anyway, it beat the hell out of me!

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achan1058 commented at 2016-01-18 06:04:11
Without a way of marking edges, it is just too taxing to solve on screen. I ended up guessing quite a bit, as it is the quicker way to go forward.

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Prasanna16391 commented at 2016-01-18 08:48:59
There is a connectivity progression there, there is no way for the top right and bottom left to connect through the 2-2s, and so they both need to go down to the bottom right separately using the 4-1 clue. If they connect directly using the 4-1 clue then the wall stops there. So top right will take the "4" and the left side will take the "1". I had to make a colour change and then realize it was a little unnecessary. That happened yesterday too.

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swaroop2011 commented at 2016-01-18 09:43:20
Very nice puzzle. I did 2 mistakes while solving and had to undo little, could have saved 100 seconds more. But very nice logical flow using connectivity. I loved it.

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snehasanjeevini commented at 2016-01-18 09:47:01
Can somebody please explain the top left part? I am getting splits both at 1-4, 1-4, 1-1-2 clue and the middle 1-2, 2-2, 1-2 set.

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Prasanna16391 commented at 2016-01-18 10:01:07
Smaller sizes are coming up again tomorrow, so I'd think the time requirement would drop with that.

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Prasanna16391 commented at 2016-01-18 10:08:07
The wall goes around the two 4-1s to the top part, and doesn't connect through the 1-1-2. R3C4 and R4C3 are the "1s" for the 4-1 clues, and R4C4 is unshaded. Try connecting it now.

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snehasanjeevini commented at 2016-01-18 10:39:36
Yeah..got it ...thanks :)

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Rohan Rao commented at 2016-01-18 12:27:03
Ok, that was hard. I think I just got lucky with my guesswork.

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Grizix commented at 2016-01-18 15:04:36
Found that one easier than yesterday, so more pleasing. Although, it would be really better if we could mark borders, as achan wrote. I had to guess in the extreme top left and bottom right corner, but found the connectivity problems with the 2-2s and the 1-4. Just guessed that the wall goes around the two groups of two clues. Guessing is not only luck, it's also intuition, which comes with experience !

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tamz29 commented at 2016-01-18 22:48:17
woah! pretty surprised with my time - didnt have to guess much - the puzzle broke into 4 corners and its a matter of joining them.

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Comments on 2016-01-19's Tapa

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prasanna16391 commented at 2016-01-19 00:02:09
I'm already missing the big puzzle days :P

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chaotic_iak commented at 2016-01-19 00:24:52
I thought this could be solved intuitively quickly. How wrong I was. (The logical solution is far easier to spot.)

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marred commented at 2016-01-19 00:39:34
thanks for a break from big puzzle :) but after a few day with smaller one i'll want switch to bigger ;)

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swaroop2011 commented at 2016-01-19 01:14:25
Big Puzzles are surely , rank changer ;)

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tamz29 commented at 2016-01-19 10:39:37
like solving minesweepers :)

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udoroh commented at 2016-01-20 02:27:25
It was very small and easy today :-)

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Comments on 2016-01-20's Tapa

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prasanna16391 commented at 2016-01-20 00:07:40
I did some really silly stuff there.

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rob commented at 2016-01-20 01:12:16
Rushing got the better of me, too... I expect some ~20s times here really.

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Prasanna16391 commented at 2016-01-20 01:51:51
Me too. My first 20 seconds were utter madness and I still managed to solve it :P

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wow this gonna be big week.

Comments on 2016-01-21's Tapa

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prasanna16391 commented at 2016-01-21 00:10:02
That was another one of those where I see a fiddly path later but don't regret it that I didn't wait around for it.

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piet commented at 2016-01-21 00:20:34
I was waiting for the good hour ... ... and YES, with 758 sec, I am in the first 20 !! ;-) ;-)

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swaroop2011 commented at 2016-01-21 00:22:33
damn what the hell i was doing. Bad day for me.

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bskbri commented at 2016-01-21 01:40:31
I worry that all tapa story will vanish in a 113 clue :/

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john_reid commented at 2016-01-21 10:26:22
Guessing guessing guessing guessing guessing guessing guessing guessing guessing guessing...

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MrLiang commented at 2016-01-21 10:51:54
guessing for 113 clue more and more -_-

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Prasanna16391 commented at 2016-01-21 12:24:33
There is a pattern here for people to know - 4-2 cannot have a shaded cell in all four corners. This helps at the top, since all the 5-1s and 3-1-1s must have all corners shaded, which forces 3 corners shaded for the 4-2. That gets some progress but I'm not sure about a solid path after that.

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yureklis commented at 2016-01-21 13:27:24
Please... I'm expert to prepare the Tapa, and I know so many tricks. So if you cannot see the path, please don't judge "guessing". For this puzzle, I'll prepare a file that show solving steps and I'll share the link which you can see the path.

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Prasanna16391 commented at 2016-01-21 18:02:43
I'd love to see that for the 1-3 day too. I think all authors here have experienced something like this where they put in some tricks and then solvers aren't able to find.the path. It should be taken in context, that solvers new to the tricks had to guess within time-constraints on an interface (which, no matter how great, won't replicate the markings of paper solving for some). I've found new patterns over the course of this CTC so I don't doubt that I missed some too, and would love to learn.

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Prasanna16391 commented at 2016-01-21 18:31:01
By 1-3 day, I mean 13th Jan.

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john_reid commented at 2016-01-22 08:38:23
Sorry about my 'guessing' comment, I probably shouldn't have posted that. No offense intended to the constructor Serkan who I do have a lot of respect for. I was just frustrated at my own inability!

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Comments on 2016-01-22's Tapa

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hinowbye commented at 2016-01-22 00:10:40
I think I'm getting the hang of this...

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prasanna16391 commented at 2016-01-22 00:12:13
My mouse gave me a real problem on this one, randomly sliding off to other cells :( Ah well.

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swaroop2011 commented at 2016-01-22 04:33:48
a relief i guess for me, after yesterdays bad day.

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john_reid commented at 2016-01-22 08:40:35
Alright! My kind of puzzle! I really like the 1-1-1-1 clues in this one!

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hinowbye commented at 2016-01-22 18:22:00
is it gonna get harder this week ?

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Prasanna16391 commented at 2016-01-22 19:38:08
Well bigger doesn't always necessarily mean harder just like smaller doesn't mean easier, as yesterday showed. It definitely gets bigger though :P

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tamz29 commented at 2016-01-23 18:30:12
yay

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Comments on 2016-01-23's Tapa

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swaroop2011 commented at 2016-01-23 00:41:27
that was bad bad. Unconscious mouse hovering, shaded some cells black which i didnt even realize :( .

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prasanna16391 commented at 2016-01-23 00:48:57
I continue to find new ways to mess up. Thankfully today's wasn't a huge loss, but somehow I clicked intto new tab while solving and when I came back a lot of random cells were shaded which I had to undo. Still, not as much damage I suppose. Great puzzle. A lot of basic filling with connectivity controlling the latter part of it.

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hinowbye commented at 2016-01-23 00:59:26
somehow I put dots into some random cells without even noticing. didnt notice it until I failed twice. great -big and hard!- puzzle.

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TiiT commented at 2016-01-23 01:28:07
Somehow I don't mess up at all. I don't like tapa but it just comes out well. :P

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chaotic_iak commented at 2016-01-23 02:28:41
Too big that it doesn't fit on my screen. And I also forgot there's scrollbar, so I was stuck for a minute or two without realizing there's a last row that is out of view.

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rob commented at 2016-01-23 05:21:01
The penalty for an error really scales weirdly with puzzle length.

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john_reid commented at 2016-01-23 09:22:43
Another great puzzle!

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Comments on 2016-01-24's Tapa

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john_reid commented at 2016-01-24 00:11:45
Excellent! This is my favorite one so far. It will be interesting to see the fastest times on this one.

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Prasanna16391 commented at 2016-01-24 00:28:08
This was really cool. I tried something weird with controlling my mouse and I think it worked, even though I probably didn't do my best here.

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swaroop2011 commented at 2016-01-24 04:04:47
My bad run continues. I think i need to change my mouse.

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MrLiang commented at 2016-01-24 10:01:49
today, I enjoy solving. :)

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rob commented at 2016-01-24 23:20:03
This hit the sweet spot for me in terms of difficulty. Really fun!

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I lost a lot of time on today's puzzle as it was stuck for a while on "waiting for server response". So I decided to click again after almost a minute and registered the time of my second click. That sucked.

Comments on 2016-01-25's Tapa

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prasanna16391 commented at 2016-01-25 00:05:44
I kept making the wrong deductions today for some reason.

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prasanna16391 commented at 2016-01-25 00:13:04
I resolved it now, and progress starting from the right is a bit tougher than progress starting from the left, but just enough that if you start there you can continue working it out. .This was mainly what slowed me down I suppose. Another great puzzle though. I don't see myself holding on to 2nd place for more than a day this time either.

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john_reid commented at 2016-01-25 02:40:42
Lower right corner was tough for me. Excellent puzzle. I love these big ones!

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kiwijam commented at 2016-01-25 13:40:49
Bigger are better :)

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puzzlescot commented at 2016-01-25 23:14:42
It would be nice to have a difficulty level visible before starting each puzzle. For the average solver, some are requiring 20+ minutes, so it's an issue if we've just put 5-10 minutes aside for a 'quick' solve. I don't think size alone is necessarily a sufficient indicator. Thanks.

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Comments on 2016-01-26's Tapa

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prasanna16391 commented at 2016-01-26 00:04:00
I missed the trick a little again by waiting on pause-spots too much. This has been a really enjoyable week of large but not difficult puzzles.

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tamz29 commented at 2016-01-26 01:24:51
Circle the 8s!

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swaroop2011 commented at 2016-01-26 02:39:00
uff finally not that bad day. I missed the other 2 big puzzles. But no mistake on this one. Very nice puzzles. I wish there are more big puzzles coming in next week.

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rajeshk commented at 2016-01-26 09:20:38
Nice big puzzles. Yes, looking forward for big puzzles next week :)

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MrLiang commented at 2016-01-26 09:45:25
Yeah, a lot of 8. But, 8 and 2-4 trick me -_-

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Comments on 2016-01-27's Tapa

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tamz29 commented at 2016-01-27 00:32:02
spent ages fixing the left side of the puzzle :(

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prasanna16391 commented at 2016-01-27 00:49:12
A lot of fun. Did a colour change for the start just to be careful, but it is definitely visible without that.

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gareth commented at 2016-01-27 01:35:12
Would be a little easier if 'undo' worked properly! :)

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achan1058 commented at 2016-01-27 02:05:08
Took me a while to find the break in, but other than that, it is fun.

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swaroop2011 commented at 2016-01-27 02:19:25
yes took a while to get started, almost spent 2 min to put few cells and then it was quick run. Very nice puzzle :)

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puzzlescot commented at 2016-01-27 08:31:04
1/2 hour of trial and error before deducing the break-in, then done in 5.

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MrLiang commented at 2016-01-27 09:50:00
bottom left clue nearly trick me. It's zigzag. -_-

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john_reid commented at 2016-01-28 20:05:50
Loved it! I was fortunate enough to get a quick start on this one.

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Comments on 2016-01-28's Tapa

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prasanna16391 commented at 2016-01-28 00:08:03
For some reason this had some strange connectivity which my head just couldn't wrap around. My main thoughts were, "this can't possibly be a break in connectivity". Took a significant amount of time at the end checking because of this. Cool puzzle.

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kishy72 commented at 2016-01-28 00:33:25
I submitted at 2:21 precisely.The server registered by time as 2:27 .It showed "waiting for server response" while the timer continued to run??!

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brecher92 commented at 2016-01-28 04:26:51
I had the same problem...though my wi-fi connection has been flaky lately.

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tamz29 commented at 2016-01-28 05:59:32
brain block :(

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MrLiang commented at 2016-01-28 09:53:28
Yeah! It's my lucky day ^_^

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john_reid commented at 2016-01-28 20:12:42
Tricky finish for me with the right hand side. Took a while to work out the 6, 3-3 and pair of 2 clues on the right wall.

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swaroop2011 commented at 2016-01-28 23:39:41
Very nice puzzle. Made silly mistake although just at the end, or else it would have been a nice finish.

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Comments on 2016-01-29's Tapa

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prasanna16391 commented at 2016-01-29 00:05:29
Should have spotted the continuity break in top left, went for a guess instead. Unnecessary.

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Prasanna16391 commented at 2016-01-29 00:17:24
For those wondering what I'm talking about (because it seems like others are missing it too) - a 2-3 clue in the corner needs at least one of R1C3/R3C1 to be separate from R3C3 as the 'other' shaded block of the 2-3, and the 1-1-1-1 clue stops connectivity "around" the 2-3 because of this. I feel anyone who spots this quickly will do very well today.

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swaroop2011 commented at 2016-01-29 00:21:02
I agree with you, after few seconds, I went for guess (not needed actually) and it was not my lucky shot. But that guess made me realize the connectivity thing in left side. But avoided mistake today :p . Very nice puzzle again.

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john_reid commented at 2016-01-29 08:09:54
Too hard for me and unfortunately I had to guess on this one again. I can kind of understand this idea about connectivity regarding that 2-3 clue in the corner but these things are very hard for me to spot. I haven't really been able to advance from 'local' to 'global' thinking and so I get stuck on these tricky puzzles more often than not.

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MrLiang commented at 2016-01-29 09:54:27
1-1-1-1 wrong guess slow my time record. -_-

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achan1058 commented at 2016-01-29 20:05:26
I hate messing up minor details. Forgot to colour a square on the bottom left.

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rob commented at 2016-01-29 23:06:38
I didn't spot the connectivity thing, but my wrong guess near the 33 did lead me to quickly discover it, and then it went smoothly from there.

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Comments on 2016-01-30's Tapa

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rob commented at 2016-01-30 01:26:37
The kind of puzzle where I'm really worried when hitting "Submit"...

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brecher92 commented at 2016-01-30 02:42:35
I'm like that for all puzzles. :)

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The homepage link to the contest seems to have vanished. For a moment, I was worried it was already over!

Funny. Anyway, here's the link, just in case people haven't noted it - http://logicmastersindia.com/2016/CTC/submit.asp#

Comments on 2016-01-31's Tapa

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rob commented at 2016-01-31 00:04:49
Fun!

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swaroop2011 commented at 2016-01-31 00:28:33
nice connectivity at top.

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prasanna16391 commented at 2016-01-31 05:43:19
Cool!

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rajeshk commented at 2016-01-31 20:07:53
Fun Puzzle

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tamz29 commented at 2016-01-31 20:32:14
nice and straightforward

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hinowbye commented at 2016-01-31 21:16:02
nice puzzle

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