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Tuesday Teaser #32: Tapa Corral 2

I'm a little surprised at the outright absence of demand. Maybe you don't want me to move to Facebook? Anyway, I'm bumping the last entry and putting the big part behind a cut. If I'm really that desperate, the least I can do is stop being so pushy about it, maybe wait 'til I have a proper header.

Today's puzzle is a real blast from the past. I was browsing Anuraag Sahay's puzzle blog (I think I got his name right) and I saw a Tapa variant where every clue was missing a digit. Now unfortunately, the author has taken that puzzle down, but it got me thinking that my previous chimera was missing some digits. (Wow, has it really been over a year since I heard of Tapa?)



So again, solve it once as a Tapa, solve it again as a Corral. The two-digit clues signify two one-digit blocks of squares in the Tapa and one two-digit area in Corral. One of a few situations where multiple solutions are a feature.

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( 3 comments — Leave a comment )
(Anonymous)
May. 24th, 2011 05:27 pm (UTC)
Nice to see tapa combined with another puzzle in an elegant way.
I liked this tapa very much,it is really sweet.I dont think i found many that solve in such a lovely way.Though i think the top-left is the best place to start,you can also "intuitively" start in the '1-3' clue down right.
Did not attempt the other half.Not sure about what the givens mean in the corral.
cyrebjr
May. 24th, 2011 06:17 pm (UTC)
All right, then. I'm glad you liked the Tapa, so here are the rules for the other puzzle.

Draw a single, looping wall along the grid lines that doesn't revisit any intersection and contains all the clues. That means it neither touches itself at a corner nor crosses itself. (Alternatively, the interior of the loop forms one polyomino and the area outside, plus a frame around the puzzle area, can form another polyomino.)

The clues give the number of interior squares, including the clue square, which are in a direct "line of sight" with that square. A "line of sight" here means that you can proceed in any one orthogonal direction (up, down, left, or right) without hitting a wall.

Here's an example of one clue, with periods showing the interior and x's showing the exterior:
.3x.
....
.xxx
..xx

The 3 clue counts its own square plus the one immediately to the left and the one immediately below. It doesn't count the one two spots to the right or three spots below because there is wall and exterior space in the way. And it doesn't count either square to the left or right of the one below it because "line of sight" is defined only for orthogonal directions.
(Anonymous)
May. 24th, 2011 11:04 pm (UTC)
The corral was a quick blast. Tapa was more difficult than it looked, and I enjoyed it quite a lot, esp. the top left part. I never fail to be impressed by the crafting skill you demonstrate with your chimeras, and this was no exception.

--term
( 3 comments — Leave a comment )

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