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Thanks again for posting that video.

Thank you for your interest. If there is a puzzle you would like to see a video for let me know.

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Thanks again for posting that video. As you say, it was the bit from 1:25 onwards that was key to unlocking the puzzle. The methodical process of elimination you used to determine where the 8 is located in row 3 was instructive.

While I eventually managed to solve the puzzle, I think I jumped around too much on the day and ran out of time. I’ll exercise more patience in future (including today’s Killer, which is proving to be a bit of a challenge so far).

Paul

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paulv66 wrote:

I’ll have a look at the rest of it to see where you managed to find the crucial step that eluded me for so long.

The more complicated steps start from about 1:25.

The timing is not great, I will work on that if I do another video, maybe it can be faster for the easy parts, and slow down for the more difficult steps.

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I’ll have a look at the rest of it to see where you managed to find the crucial step that eluded me for so long.

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frederick wrote:

nice

with #4 as well ?

Thanks frederick.

Not sure what your question is about #4.

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with #4 as well ?

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There are a few typing errors and it goes a bit quick, I will try to make improvements for my next video if there is any interest.

https://youtu.be/ylVdvYrIVig

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I was just thinking about writing a guide for the bitwise OR operation, but this thread deems that mostly unnecessary.

However, I would like to add one perspective that I often take on cages with 3|, 5| and 6|.

As clm rightly points out, these only have few combinations which go in to it. Taking 3|-cage as an example, you will see from the list of combinations that only 1's, 2's and 3's may go in to such a cage. However, it gets a bit better:

This means that, once you see a cage with 3| in it, you can pencil-mark 1's, 2's and 3's in ever cell of the cage. Once you've done that, you can completely ignore the cage itself. By this I mean: you have extracted all the information there is from the 3|-cage, and you won't need think about the actual cage again.

The exact same works for 5| (but this time with 1's, 4's and 5's) and for 6| (with 2's, 4's and 6's).

If you don't like thinking about bitwise OR operation (which I don't think anybody does), this may simplify things a bit.

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I'm sure an expert would change my code around to make a lot smaller in size, run quicker etc but it does the job for me for the most part but would like to tidy up & add a bit t it. I used to use a website that was listed in the forums here years ago that I used for ages but it only did + - / * up to 9. I have it at the moment that it does + - / * ^ | & bit so all bases covered.

Let me know if anyone can help or point me to something similar already done so I'm not reinventing the wheel.

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https://www.youtube.com/watch?v=jdNSrfn8OaA

Any comments are much appreciated

(I'm half expecting most will be of the type: "you could have solved

it much more quickly by doing XYZ )

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cjsidharth wrote:

I'm trying to attach an image but can't figure it out.

Some info is here: viewtopic.php?f=3&t=38

(I'll make this a "sticky" topic so it stays at the top)

(if you already have the image, you only need step 2 of course)

Patrick

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Remember that the cages with 0x or 0/ must have a cell with the value 0.

1. a5 is not 0, refer to cage b4

2. a6 is not 0, refer to row 1 (b1 and e1 would be 0 if a6=0)

3. c5 is not 5, refer to cage c1 (cage c1 must have -1 in one of the cells)

4. a6 is not 1, refer to cage d6

5. c6 is not 0, refer to cage c3 (if c6=0 then d5=0 and that would leave no 0 for any cell in cage c3)

6. c6 is not 2, refer to rows 5&6, cage e5 would have no valid values.

7. c5 or d5 must be 2, that solves cell a5

From this point it is all basic steps to complete the puzzle.

I have created some images of the above steps if anybody is interested.

If anybody has any questions please feel free to ask, or if I made a mistake let me know.

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It took some trial and error in several cages, but I eventually arrived at the correct solution. I had a no-op bonus puzzle before this one IIRC. I can only imagine the chaos that would ensue if there were a bonus puzzle with negative numbers AND no-op in it!

skeeter84

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