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nasty puzzle today (Saturday, 7th October 2006)
procrastinator
Kwon-Tom Obsessive
Puzzles: 1083
Best Total: 12m 56s
Posted - 2006.10.07 12:46:38
In response to PuzzleLover's unlocked thread:

The shortest logical solution I can find hinges on the first 3 on the bottom line. Imagine what happens to the right if it has an x on the bottom. There are other bits that aren't trivial, but it's fairly obvious where to look for them. Whereas most of the lower right half of my board is vacant until I use that 3.
PuzzleLover
Kwon-Tom Obsessive
Puzzles: 1033
Best Total: 38m 17s
Posted - 2006.10.07 22:17:17
Quote:
Originally Posted by procrastinator
In response to PuzzleLover's unlocked thread:

The shortest logical solution I can find hinges on the first 3 on the bottom line. Imagine what happens to the right if it has an x on the bottom. There are other bits that aren't trivial, but it's fairly obvious where to look for them. Whereas most of the lower right half of my board is vacant until I use that 3.
I guess you mean "first from the left", the 3 at r14c9.  That's a very nice observation, thanks.

My lucky guess used the diagonal 1's at r12c9 and r11c8.  I guessed 4 x's where the 1's meet, which eventually led to a solution.  Though I didn't see it yesterday, trying the other 4 x's reaches essentially the same visible contradiction as yours (with some reading) in 7 clicks (6 x's, 1 line).  Yours is much nicer

After that, it's a moderately challenging (for me) but nice solve.  Many times there are patterns I know but find a bit hard to spot, which seem to be the only humanly tractable logical choices available.

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